Driver Safety Equipment

Helmets – Full face helmets are required for all occupants of the vehicle.

Fire Suits – Full fire suits are highly required for all occupants of the vehicle. At a minimum long sleeve shirts and full length pants are required.

NECK RESTRAINTS - All competitors shall utilize a Head and Neck Restraint System in accordance with one of the following specifications:
• SFI 38.1 specifications
• FIA standards 8858-2002 or FIA 8858-2010
• Donuts and neck collars are not allowed

• 1.11: IDENTIFICATION MARKERS
• 1.11.1: All vehicles in competition must be identified with the correct entrant number.
• 1.11.2: Entrant numbers shall be composed of a combination of digits 0 through 9 only (no letters).
• 1.11.3: All vehicles must utilize a “shark fin” style number plate located behind the “B” pillar and offset in
• from the side panels of the vehicle to protect it from mud. In addition to the “shark fin”, all vehicles must have one front facing and one rear facing number plate with the same color combination as the “shark fin”. Shark fin numbers must be 7” tall with 1” brush stroke. Front and rear facing numbers must be 6” tall.
• Black numbers with a white or yellow background. Any number location that is deemed to be too hard to read will have to be changed before the vehicle is allowed to compete in the event.
• 1.11.4: Y.O.R.R. assumes no responsibility for scoring vehicles with unrecognizable numbers. It is the vehicle driver’s responsibility to maintain numbers in recognizable condition. This includes mud, dust, etc. If we can’t see your numbers we will not score your times.
• 1.11.5: Advertising, symbols, and names may be displayed on competition and support vehicles provided that they do not interfere with required official identification markings and that they are in good taste as judged by Y.O.R.R. sanctioned representatives.

There has been a lot of discussion on are penalty and discloser system, and why
we have it. This being our first season of racing for points, we have a number of
race rigs that want to race , but do not fit the rules exactly as they are written.
One example was Brian and his tire issue. Last year he bought 35 inch tires and
can’t afford new tires to fit the 33 inch rule. Are the 35 tires going to benefit him
in the race? Maybe. Will they be the deciding factor in him winning the race . I
think we can all agree that will not be the deciding factor. None the less, they are
outside the rules. This is where they penalty and discloser rule comes into play.
When you tech and register, you will be required to disclose any part of your rig
that does not fit into the rules as they are written. After the drivers meeting, we
will meet as a group and assess the penalties as a group, based on your disclosers.
The penalty can be up to 10%. Anything above that would jump to the next class.
At this time the driver can either accept the penalty or reject it. If rejected he can
then opt to run sportsman or move up to the next class. After the race is done we
will have a mandatory impound area for post-race inspection. Also a place that
spectators can check out the rigs. The rigs must remain there for 30 minutes after
the race ends, so every racer has a chance to check them out. If a problem is
found after the race, the penalty will be assessed at that time. Possibly taking a
position away. This is where the discloser policy will help you out. If you do have
a penalty, you will know up front what you must do to win. In the post-race
inspection we will be looking for competitive advantages only. Tech and safety
will not have a post-race inspection or penalty.

Last updated 3-15-2024

Y.O.R.R. OFFICIAL RULEBOOK
1.0 UTV Classes____________
Pro Turbo Production UTV Class definition:
The Pro Turbo production class vehicles are built using production Turbo UTV’s, manufactured by
registered companies, i.e. Polaris, Can-Am, Artic Cat, that issues Vin #’s. Companies must produce a
minimum number of 1000 units per year. UTV’s must have a minimum of 2 seats. OEM engines must be
used unless specified for the class. All OEM engine electronics must be used unless specified for the
class. Maximum engine size is 1000cc. Must use hood, grill, front and rear fenders from the UTV. The Pro
Classes do have a points championship, a points championship fund, and an individual race purse.
Pro Production UTV Class definition:
The Pro UTV production class vehicles are built using production UTV’s, manufactured by registered
companies, i.e. Yamaha, Polaris, Can-Am that issues Vin #’s. Companies must produce a minimum of
1000 units per year to be accepted. UTV’s must have 2 seats. OEM engines must be used. Maximum
engine size is 1000cc. Must use hood, grill, front and rear fenders from the UTV. This Pro Class does have
a points championship, a points championship fund, and an individual race purse.
Pro Unlimited UTV class definition:
The Pro Unlimited UTV class vehicles are built using a factory UTV frame or a full tube custom frame.
Motorcycle, snow mobile or UTV engine must be used. Maximum engine size 2000cc. No car engines.
Turbo chargers and superchargers are allowed. Must use Hood and front fenders from a UTV. Max
wheelbase 134”. The 134” wheel base can be achieved by cutting the factory frame or built into the custom
tube frame. Any type of suspension is allowed. This is an open UTV class, with the
exception of wheelbase 134”, width 80” and tire size 32”. This Pro Class does have a points championship,
a points championship fund, and an individual race purse. Any UTV is legal to race in the Unlimited UTV
class. Any racer that enters this class must stay in this class for the remainder of the season,
although, they can move to the sportsman class if they do not want to race Pro class.
Sportsman UTV class definition:
The Sportsman class is for any UTV team that wants to race but does not care, to race for championship
points or prize money. The Sportsman class has lower entrée fee. Any UTV vehicles that are not built to
the Pro UTV production class rules, but are classified as a UTV by a YORR UTV tech inspector will be
allowed race in the Sportsman UTV class.
Driver Safety Equipment
Helmets – Helmets must meet the following requirements; Snell memorial foundation, SAH2015, SA2015,
or SA2020 with a legible Snell sticker attached, FIA Standard 8860-2004, 8860-2018, 8860-2018-ABP,
8860-2010, and 8859-2015 with a legible with a legible FIA sticker attached.
Protective Clothing – Driving suits are required that cover the body from the neck to the ankles and to
the wrist. Suits must be manufactured from fire resistant material with the manufacturer's fire-resistant
label attached. Suits must be labeled SFI 3.2A/5 or higher. DRIVING SUITS ARE MANDATORY. Drivers’
suits must be in good condition, clean and free of damage (i.e., holes, tears, rips, etc.). Driving gloves
and shoes must meet SFI 3.3 requirements and be free of holes are mandatory. Leather boots are
acceptable. Only cotton undergarments or fire-retardant long sleeve tops, and long bottom undergarments
as well as fire retardant socks rated to the SFI 3.3 specification are allowed.
NECK RESTRAINTs- All competitors shall utilize a Head and Neck Restraint System in accordance with
one of the following specifications:
• SFI 38.1 specifications.
• FIA standards 8858-2002 or FIA 8858-2010
• Donuts and neck collars are not allowed
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1.1 SUSPENSION COMPONENTS
1.1.1: SHOCK ABSORBERS - Stock shocks or aftermarket replacement shocks are permitted so as far as
the original chassis mounting points are retained. Factory mounting position may have material added for
the purpose to strengthen, but must retain the factory material, and specifications. Upper shock mount can
be repositioned but must be an off the shelf bolt in kit. No weld in mounts allowed.
1.1.2: BUMP STOPS - Hydraulic Bump stops are not permitted
1.1.3: Long Travel Suspension - Suspension kits must be aftermarket off the shelf suspension kits
readily available for sale and must not exceed an outside track width of 77”.
1.1.4: Stock factory suspension pivot point specifications must be retained and connecting points must be
free of cracks and in good physical condition as determined by the Chief Technical Inspector or his/her
delegate. Factory suspension pivot points may have additional material added for the purpose of
strengthening but factory material must not be removed.
1.2: WHEELS & TIRES
1.2.1: Tires shall be visually checked for condition and must not be considered obviously unsafe by the
Chief Technical Inspector.
1.2.2: Maximum tire size is unlimited.
1.2.3: Tires must be factory-built readily available. Tires from any ATV/UTV tire manufacturer are
permitted.
1.2.4: Tire studs, screws, or any other items added to the tire are not permitted.
1.2.5: Grooving, sipping, or other modifications that involve removing material from the tire are permitted.
1.3: FASTENERS
1.3.1: It is recommended that all component parts of the vehicle’s steering, suspension, chassis, drivetrain,
and running gear be secured with fasteners suitable to the task, and in good working order. Male threaded
fasteners should be secured with either: lock nuts, lock washers, cotter pins or safety wire and shall have
at least one full thread showing through the nut.
1.4 STEERING
1.4.1: Drag link and tie rod ends designed for use with a castellated nut and cotter pin must be secured
with a cotter pin. Spherical rod ends (Heim joints) are a permitted replacement for OEM-style tapered tie
rod ends.
1.4.2: Aftermarket steering racks are permitted but must retain factory type.
1.4.3: Factory power steering is permitted. Aftermarket electric power steering is approved.
1.5 BRAKES
1.5.1: Brakes are considered the system used for slowing and stopping the wheels.
1.5.2: Brakes must be able to apply adequate force to lock up all four tires. Brakes must be in a safe
operating condition and free of leaks during the entire event. If brake system problems occur during the
event they must be repaired before continuing in competition.
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1.5.3: Turning, cutting, or steering brakes are not permitted.
1.5.4: Aftermarket brake products are permitted.
1.5.5: Brake pedal(s) mounted in driver’s foot-well must be able to operate all brakes with a single foot.
Adjustable brake bias is not allowed. Factory brake pedal assembly needs to be retained.
1.5.6: Each vehicle should have a means of applying continuous brake pressure while vehicle is parked
with occupant(s) outside the vehicle. Hydraulic “line-locks” or mechanical “park” mechanisms are
permitted.
1.6 ELECTRICAL SYSTEM
1.6.1: IGNITION - Each vehicle must have a positive action on/off ignition switch. The switch must be
labeled “ignition on/off” and be located within easy reach of the driver and from the outside of the vehicle.
1.6.2: BATTERIES - Batteries must be securely mounted.
1.6.3: LIGHTS - All UTVs must have a minimum of two taillights, two brake lights. All UTVs must have 4
rear facing safety lights. The 4 required rear facing safety lights are; 1 steady amber, 1 flashing amber, 1
blue light steady. All 3 of these safety lights must be LED, a minimum of 2000 lumens and 4 bulbs. THE
4th MANDATORY REAR SAFETY LIGHT IS A SPEC BLUE STROBE LIGHT. THIS LIGHT MUST BE
MOUNTED AS HIGH UP ON THE CAGE AS POSSIBLE AT A MINIMUM OF 48” AND REAR FACING.
The amber flashing and blue strobe is an attempt to identify the UTV class vehicle, so that faster vehicles
will be able to recognize that they are approaching a slower vehicle. Safety lights must be approved by the
YORR UTV Tech Inspector. Federal Signal, Rigid, Tribal Whips and KC Hilites have been approved. Other
manufactures may be approved call the YORR UTV Tech inspector for more information. YORR rules
state that all safety lights must be working at all times, if a light fails to work it must be fixed at the
next pit stop, or the vehicle cannot continue.
NOTE--The blue light should only be used during an official race. Previous incidents report this is illegal on
roads and BLM, State, or public lands. All lights must be in operating condition at time of inspection. All
rearward facing lights (taillights, brake lights, blue light, and amber lights) must be in operating condition
before the vehicle will be permitted to start the race. All rearward-facing lights must be protected against
damage in the event of a rollover. Tail lights/brake lights must be at least 3 inches in diameter, or
meet YORR approval. They must be mounted in such a manner as to be clearly visible from the rear of the
vehicle. Rearward facing amber lights and blue light must be approved by the YORR UTV Tech Inspector.
The amber lens must be deep-coated amber in color (no other color is permitted). The blue lens must be
medium coated blue in color (no other color is permitted). The amber lights and blue light must be mounted
a minimum of 48 inches from the ground and must be clearly visible, with no obstructions (IE: not mounted
behind any solid object), from any angle from the rear of the vehicle. The amber lights and blue light must
be placed so that an approaching driver’s vision is not impaired. The amber lights and blue light must
remain on during the entire race.
1.6.4: STARTER - All vehicles must be self-starting by use of an onboard electric starter.
1.6.5: HORN – All vehicles must be equipped with a horn or siren. The horn or siren must be load enough
that it can be clearly heard over a running engine. The horn or horn switch must be mounted in a location
that can be reached by the driver or co driver while wearing a safety harness.
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1.7. FUEL SYSTEM
1.7.1: FUEL - Any of the following commercially available fuels may be used:
1.7.1.A: Service station pump gasoline (the type normally used in passenger vehicles for highway
use, this also includes E85.)
1.7.1.B: Racing gasoline as manufactured
1.7.1.C: Commercial aviation gas
1.7.1.D: Diesel fuel (including bio-diesel)
1.7.1.E: Propane or natural gas.
1.7.1.F: Commercially produced, nationally advertised fuel additives may be used.
1.7.1.G: No alcohol, or nitro-methane is permitted. Nitrous Oxide is not permitted.
1.7.2: Stock fuel systems - Unmodified stock fuel systems are approved
1.7.3: Modified fuel systems - Safety fuel cells are required for any vehicle that has modified its factory
fuel system. Safety fuel cells shall consist of a bladder enclosed in a smooth skinned container. The
container shall be constructed of 20-gage steel, 0.060 Inch aluminum, or 0.125 inch marlex. All fittings
must be built into the container skin and bonded to the container skin as an integral part of the tank or
mechanically sealed by a ring and counter-ring system by either flat joint or an O-ring. Internal baffling is
mandatory in all fuel cells. Foam is an acceptable internal baffling. Bladder construction shall be of nylon or
Delcron woven fabric impregnated and coated with a fuel resistant elastomer, rotary molded polymer cells
are acceptable when encapsulated in a container constructed of 20-gage steel, or 0.060 inch aluminum.
1.7.4: Fuel tanks shall be mounted in a fashion to protect the tank from damage due to a rear-end or side
collision, impact from debris or rocks from below the vehicle, damage due to roll over, or the possibility of
damage from chassis flex. Firewalls and/or bulkheads must separate the driving compartment from any
fuels, engine fluids, and acids. Rear mounted Fuel cells higher than drivers shoulder must extend fire wall
to 2 inches above fuel cell.
1.7.5: Fuel filler lines and positive-locking, non-vented fuel filler caps must be located and secured in such
a manner as to prevent them from being knocked off or open during vehicle movement, rollover, or
accidental impact.
1.7.6: The fuel vent line if so equipped must vent outside of occupants’ compartment and be directed away
from the engine and exhaust system.
1.7.7: All fuel fillers attached to the frame or a body panel must use a flexible coupling to the tank. All fuel
fillers must be surrounded by a boot or splashguard. (Body panel is acceptable as a splashguard if it is
sealed.) Splashguard must direct fuel out of the vehicle and away from occupants.
1.7.8: Factory ECU’s must be retained; aftermarket tuners are approved. Stand-alone aftermarket ECU’s
are prohibited. Aftermarket CDI is acceptable for carbureted rhino models.
1.7.9: Fuel mats are recommended for all refueling. No vehicles shall be refueled outside approved pit
locations. Storage of fuel in the pits shall consider safety the highest priority. Check with local event
restrictions concerning the storage, transportation, and transfer of fuel. Y.O.R.R. highly recommends the
use of safety tape and “No smoking/No open flame” signs in the area surrounding fuel storage and transfer
locations.
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1.8 ENGINE TRANSMISSIONS TRANSFERCASE & DRIVELINE
1.8.1: Engine make is limited to the stock configuration from the manufacture not to exceed 1000CC. No
snowmobile or motorcycle engines allowed. Air cleaner, header pipe, exhaust pipe, muffler and clutch can
be changed and or modified.
1.8.1a: Factory installed turbos are allowed in the Pro Turbo Production UTV Class, however factory
geometry must be maintained on the turbine and impeller. No aftermarket intercoolers will be allowed.
Turbochargers must be OEM stock. No modifications or changes are allowed.
1.8.1b: Unlimited and Sportsman UTV classes; Any turbocharger is allowed. Any modifications are
allowed. Any ECM/ECU is allowed. Any fuel controller is allowed. Any engine electronics are allowed.
1.8.1c: FUEL CONTROLLERS Pro Production class is allowed to use aftermarket fuel controllers. Pro
Turbo Production class is NOT allowed to use aftermarket fuel controllers.
1.8.2: Engine shall be free of leaks.
1.8.3: Entrant may replace a complete engine during an event. Entrant will be deemed to have replaced a
complete engine if the case has been replaced.
1.8.4: Every vehicle must have a functional reverse gear.
1.8.5: Transmissions are limited to stock as supplied from the manufacture. Transmission shall be free of
leaks.
1.8.6: All vehicles shall be 4-wheel drive
1.8.7: All throttles, whether controlled by hand or foot, must have at least one return spring of sufficient
stiffness to instantly close the throttle plate when the throttle is released. Carbureted vehicles must have at
least two throttle-return springs, at least one of which must be attached to the carburetor. All vehicles
should have at least one throttle return spring at the throttle plate and one at the throttle control (pedal or
hand control). Computer controlled throttles (Electronic Throttle Control or “drive-by-wire” systems) are
exempt from the requirement to have a return spring at the throttle body, but must have a return spring at
the throttle control (pedal or hand control) or maintain the stock OEM system. A positive stop or throttle
override system must be used to prevent throttle linkage from sticking in an open position.
1.8.8: A hand throttle may be used if physical limitations require use of such device. Hand throttles must
meet the same requirements as foot throttles, and must meet with the approval of Y.O.R.R.
1.8.9: Oil coolers, transmission coolers, and radiators located in front of the vehicle occupants must have a
shroud that, in the event of a rupture or leak, will prevent liquids from blowing back or leaking onto the
occupants. All hoses running through the passenger compartment must be shielded. Steel braided hoses
do not constitute a shield.
1.8.10: All vehicles must start event in good working condition.
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1.9 VEHICLE SAFETY EQUIPMENT
1.9.1: ROLLCAGES - It is each competitor’s responsibility to present a safe vehicle for pre-event technical
inspection. Competitors must maintain their safety equipment including the roll cage integrity. Y.O.R.R.
reserves the right to not allow any cage designs that, in the opinion of the Chief Technical Inspector, is not
fit for competition. Competitors are ultimately responsible for their vehicle’s safety features, including the
design, fabrication, quality of execution, maintenance, and repair of the roll cage structure. The roll cage is
considered to be the main 6-point structure that surrounds and protects the vehicle’s occupants.
1.9.2: Six (6) point or higher roll cages are required surrounding the occupants. Stock factory roll cages
that are made from .095” wall thickness tubing or higher and have 6 points of contact are acceptable but
not recommended. Main tubes of the roll cage must be of one piece design with no removable sections.
The only bolted joint allowed on the main hoops is at the connection to the vehicle frame. 2 front window
bars towards the center of the vehicle are highly recommended.
1.9.3: All welds must be of high quality, with good penetration and no undercutting of parent material.
1.9.4: All roll cage components (hoops, braces, gussets, etc.) must have a minimum of 3” of clearance
from any vehicle occupant’s helmet when occupant is seated in normal driving/riding position. All roll cage
components that might come into contact with the vehicle occupants’ helmets must be padded.
1.9.5: Roll cages must be securely mounted to the frame, chassis, or body. Roll cage mounting fasteners
must be at least 3/8” diameter S.A.E. or metric equivalent, Grade 8 or equivalent or better when utilizing
the stock mounting positions. Sandwich plates, if used, must be oriented only in the horizontal plane. No
vertical or other non-horizontal sandwich plate orientations are permitted.
1.9.6: Welding of cab or body-mounted roll cages to body structure is strictly prohibited. Roll cage terminal
ends must be attached to a frame or body member that will support maximum impact and not shear or
allow movement in the cage terminal end.
1.9.7: All vehicles must include factory or aftermarket door with permanent or secondary latching system to
protect occupants in the event of a roll over, or collision. A chassis integrated door bar with an aluminum
skin is approved.
1.9.8: Gussets should be installed at all major intersections, including diagonal and rear down braces,
where single weld fractures can affect occupants’ safety. Gussets of the same material and thickness as
the roll cage may be used.
1.9.9: A minimum 0.040” expanded or flat sheet steel or 0.125” aluminum should cover the area
immediately above the occupants’ seats and be attached via welding or bolting to a steel tubing frame
work.
1.9.10: DRIVER RESTRAINT SYSTEMS - All vehicles must have a five-point H-style driver restraint
system for each occupant. Driver restraints must incorporate a lap belt, anti-submarine strap, and shoulder
straps.
1.9.11: The driver restraint system shall consist of one 2” wide anti-submarine strap, one 3” wide lap belt
and two 3” wide shoulder straps. Sternum straps and chest buckles may be used. Hybrid Head & neck
restraint belts allowed when used in conjunction with a head and neck restraint system. The use of some
form of neck protection is highly recommended.
1.9.12: Belt/strap material shall be nylon or Dacron polyester. Driver restraint system must be in new or
perfect condition with no cuts, frayed layers, chemical stains, or excessive dirt and must be in flexible
condition (i.e. material must not be stiff).
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1.9.13: No portion of the driver restraint system may be altered in any fashion from the manufacturer’s
standard design.
1.9.14: All driver restraint systems must be properly mounted in accordance with manufacturer’s directions
and recommendations. Bolt in, wrap-around, and snap-in mounting styles are permitted, except that lap
belts may not be mounted by wrap-around method.
1.9.15: In addition to conforming to the manufacturer’s directions, driver restraint system installations must
also conform to the following:
1.9.15.A: The driver restraint system must be mounted to structural members able to withstand the load
the restraint system will place on them in a crash, without rupturing or failing.
1.9.15.B: Driver restraint must be matched to a properly constructed, fitted, and installed seat securely
mounted to the frame / chassis / roll-cage.
1.9.15.C: Seats must not be modified to create belt slots.
1.9.15.D: All belts should be as short as possible to minimize the belt's stretch.
1.9.15.E: Belt routing must allow webbing to pull in a straight line against anchor point. Mounting brackets
must be at an angle that is compatible with the direction of pull on the webbing.
1.9.15.F: Preferred anchor mount is a double-shear bracket.
1.9.15.G: Driver restraint systems must be mounted using high-quality hardware appropriate for the
installation. 1/2" or 7/16" OR Metric equivalent fine-thread Grade 8 bolts and Grade 8 deformed thread
locknuts (or better) are recommended.
1.9.15.H: Belts must not rub against any surface that will cause them to fray.
1.9.15.I: 3-bar slides must be located as close as possible to the anchor plate, or if belt is wraparound
style, to the bar around which they wrap.
1.9.15.J: Belts using non-sewn anchor plates must be wrapped back a fourth time through the 3-bar slide.
1.9.15.K: Wrap-around style mounting should be confined to shoulder and 5th point belt installation and
must include some method to prevent lateral movement of the belts.
1.9.16: Driver restraint systems must be worn properly tightened, by all occupants; at any time the vehicle
is in motion.
1.9.17: SAFETY NETS - Approved safety nets are mandatory on all vehicles and must cover the complete
open area of the cockpit on both sides of the vehicle to the extent that it is impossible for any limb or body
part of any occupant to protrude from the vehicle at any time when the occupant is properly seated and
strapped in their normal driving / riding position.
1.9.18: Nets must be installed on the inside of the roll cage to prevent them from being damaged or
coming off in a roll over or slide on the side.
1.9.19: Nets attached to doorframes are permitted when Door frame is equipped with a latch that prevents
it from opening and locked permanently closed.
1.9.20: Nets must be installed so that the occupants can release the netting unassisted and exit the
vehicle regardless of the position of the vehicle.
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1.9.21: The net border or edge and the net attachment must be made of materials that are as strong as, or
stronger than, the net itself. Net attachments must be at a minimum of every 6 inches. Acceptable
attachments include, but are not limited to: steel hose clamps, snaps, lift-a-dot, metal hooks, and steel
rods. Nets must be tight so that when subject to a pushing force of approximately 50lbs the net deflects no
more than four inches.
1.9.22: SEATING - All seats must be manufactured by a recognized manufacturer and approved for racing
application for human beings. Seats must be interchangeable between left and right sides. Mock seats are
not approved.
1.9.23: All seats must be securely mounted to frame of vehicle.
1.9.24: Adjustable track-type seat mounts must be securely mounted to frame of vehicle to allow no lateral
or vertical movement between seat and frame or mounting track and frame.
1.9.25: Headrests constructed of at least 2” thick resilient padding and being approximately 36 square
inches in area are required or the use of a high back seat.
1.9.26: Fire Extinguishers – It is required that each vehicle carry at least two fire extinguishers. The fire
extinguishers must be mounted so that one or both is accessible to the occupants and that one or both are
accessible to someone on the outside of the vehicle. In addition the mounts constructed in a manner that
will keep the fire extinguishers secure in the event of a roll over, collision, etc.
1.10 GENERAL VEHICLE COMPONENTS
1.10.1: The vehicle occupants must be able to easily enter and exit unassisted with the vehicle in any
position. Firewalls and/or bulkheads must separate the driving compartment from any fuels, engine fluids,
and acids.
1.10.2: Official vehicle weight shall be the empty dry weight of the vehicle. Empty dry weight is measured
without fuel, spare tires, tools, spare parts or occupants in vehicle. Official weight will be the weight as
shown on the Y.O.R.R. official scales where applicable.
1.10.3: Stock floorboards as delivered from manufacture are required on all vehicles. Floorboards must
cover the entire area from in front of the pedal assembly to behind the seat(s), and from the outside edge
to the outside edge of the vehicle.
1.10.4: No hazardous front or rear bumpers, nerf bars, frame heads or other protruding objects from
vehicles are permitted. Ends must be capped and rounded to prevent any sharp edges. Bumpers and nerf
bars must be designed in a way that reasonably minimizes the chance of two vehicles becoming locked
together.
1.10.5: A rear view mirror is required on all vehicles. Mirrors must have at least six square inches of mirror
surface. Mirror must have a reasonably unobstructed view of area behind vehicle.
1.10.6: All spare parts and extra equipment carried on or in a vehicle must be securely attached or stowed
to prevent movement during competition. All spare parts and extra equipment must be carried in a manner
that minimizes the risk of injury to the vehicle occupants.
1.10.7: All vehicle body parts must remain on the vehicle (accidental damage excluded) during the entire
event.
1.10.8: Chassis frame may not be modified from factory specifications. Vehicles are to retain overall UTV
appearance as delivered from the factory.
1.10.9: Minimum dry vehicle weight less occupants is 1200 lbs.
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1.11: IDENTIFICATION MARKERS
1.11.1: All vehicles in competition must be identified with the correct entrant number.
1.11.2: Entrant numbers shall be composed of a combination of digits 0 through 9 only (no letters).
1.11.3: All vehicles must utilize a “shark fin” style number plate located on the roof behind the “B” pillar and
offset in from the side panels of the vehicle to protect it from mud. In addition to the “shark fin”, all vehicles
must have one front facing and one rear facing number plate with the same color combination as the
“shark fin”. Shark fin numbers must be 7” tall with 1” brush stroke. Front and rear facing numbers must be
6” tall. Black numbers with a white or yellow background. Any number location that is deemed to be too
hard to read will have to be changed before the vehicle is allowed to compete in the event.
1.11.4: Y.O.R.R. assumes no responsibility for scoring vehicles with unrecognizable numbers. It is the
vehicle driver’s responsibility to maintain numbers in recognizable condition. This includes mud, dust, etc.
If we can’t see your numbers we will not score your times.
1.11.5: Advertising, symbols, and names may be displayed on competition and support vehicles provided
that they do not interfere with required official identification markings and that they are in good taste as
judged by Y.O.R.R. sanctioned representatives.
 

1.0 Youth Beginner UTV______
Polaris RZR 170 Vehicle, Polaris ACE/Ranger 150 or equivalent vehicle
DEFINITION: Single or two seat youth class for drivers aged 5-11 years. This class will run on a very
shortened course by the pits 2-8 laps depending on the track in between races or the night
before.
This is an open class and all components will be considered open unless restricted herein
Driver Safety Equipment
Helmets – Full face helmets are required for all occupants of the vehicle.
Fire Suits – Full fire suits are highly recommended for all occupants of the vehicle. At a minimum long
sleeve shirts and full length pants are required.
1.1 SUSPENSION COMPONENTS
1.1.1: FRONT SUSPENSION – stock
1.1.2: REAR SUSPENSION - stock
1.1.3: Shock Absorbers - stock
1.1.4: SECONDARY SUSPENSION – No secondary suspension allowed
1.2: WHEELS & TIRES
1.2.1: Tires shall be visually checked for condition and must not be considered obviously unsafe by the
Chief Technical Inspector.
1.2.2: Maximum tire size is unlimited.
1.2.3: Tire studs, screws, or any other items added to the tire are not permitted.
1.2.4: Grooving, sipping, or other modifications that involve removing material from the tire are permitted.
1.3: FASTENERS
1.3.1: It is recommended that all component parts of the vehicle’s steering, suspension, chassis,
drivetrain, and running gear be secured with fasteners suitable to the task, and in good working order.
Male threaded fasteners should be secured with either: lock nuts, lock washers, cotter pins or safety wire
and shall have at least one full thread showing through the nut.
1.5 BRAKES
1.5.1: Brakes are considered the system used for slowing and stopping the wheels.
1.5.2: Brakes must be able to apply adequate force to lock up all four tires. Brakes must be in a safe
operating condition and free of leaks during the entire event. If brake system problems occur during the
event they must be repaired before continuing in competition.
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1.5.3: Turning, cutting, or steering brakes are not permitted.
1.5.4: Aftermarket brake products are permitted.
1.5.5: Brake pedal(s) mounted in driver’s foot-well must be able to operate all brakes with a single foot.
Adjustable brake bias is not allowed. Factory brake pedal assembly needs to be retained.
1.5.6: Each vehicle should have a means of applying continuous brake pressure while vehicle is parked
with occupant(s) outside the vehicle. Hydraulic “line-locks” or mechanical “park” mechanisms are
permitted.
1.6 ELECTRICAL SYSTEM
1.6.1: IGNITION - Each vehicle must have a positive action on/off ignition switch. The switch must be
labeled “ignition on/off” and be located within easy reach of the driver and from the outside of the vehicle.
1.6.2: BATTERIES - Batteries must be securely mounted.
1.6.3: LIGHTS - All vehicles must have a minimum of two taillights, two brake lights
1.6.4: STARTER - All vehicles must be self-starting by use of an onboard electric starter.
1.6.5: HORN – All vehicles must be equipped with a horn or siren. The horn or siren must be load enough
that it can be clearly heard over a running engine. The horn or horn switch must be mounted in a location
that can be reached by the driver or co driver while wearing a safety harness.
1.7. FUEL SYSTEM
1.7.1: FUEL - Any of the following commercially available fuels may be used:
1.7.1.A: Service station pump gasoline (the type normally used in passenger vehicles for highway
use, this also includes E85.)
1.7.1.B: Racing gasoline as manufactured
1.7.1.C: Commercial aviation gas
1.7.1.D: Diesel fuel (including bio-diesel)
1.7.1.E: Propane or natural gas.
1.7.1.F: Commercially produced, nationally advertised fuel additives may be used.
1.7.1.G: No alcohol, or nitro-methane is permitted. Nitrous Oxide is not permitted.
1.7.2: Stock fuel systems - Unmodified stock fuel systems are approved
1.7.3: Modified fuel systems - Safety fuel cells are required for any vehicle that has modified its factory
fuel system. Safety fuel cells shall consist of a bladder enclosed in a smooth skinned container. The
container shall be constructed of 20-gage steel, 0.060 Inch aluminum, or 0.125 inch marlex. All fittings
must be built into the container skin and bonded to the container skin as an integral part of the tank or
mechanically sealed by a ring and counter-ring system by either flat joint or an O-ring. Internal baffling is
mandatory in all fuel cells. Foam is an acceptable internal baffling. Bladder construction shall be of nylon
or Delcron woven fabric impregnated and coated with a fuel resistant elastomer, rotary molded polymer
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cells are acceptable when encapsulated in a container constructed of 20-gage steel, or 0.060 inch
aluminum.
1.7.4: Fuel tanks shall be mounted in a fashion to protect the tank from damage due to a rear-end or side
collision, impact from debris or rocks from below the vehicle, damage due to roll over, or the possibility of
damage from chassis flex. Firewalls and/or bulkheads must separate the driving compartment from any
fuels, engine fluids, and acids. Rear mounted Fuel cells higher than drivers shoulder must extend fire wall
to 2 inches above fuel cell.
1.7.5: Fuel filler lines and positive-locking, non-vented fuel filler caps must be located and secured in
such a manner as to prevent them from being knocked off or open during vehicle movement, rollover, or
accidental impact.
1.7.6: The fuel vent line if so equipped must vent outside of occupants’ compartment and be directed
away from the engine and exhaust system.
1.7.7: All fuel fillers attached to the frame or a body panel must use a flexible coupling to the tank. All fuel
fillers must be surrounded by a boot or splashguard. (Body panel is acceptable as a splashguard if it is
sealed.) Splashguard must direct fuel out of the vehicle and away from occupants.
1.7.9: Fuel mats are recommended for all refueling. No vehicles shall be refueled outside approved pit
locations. Storage of fuel in the pits shall consider safety the highest priority. Check with local event
restrictions concerning the storage, transportation, and transfer of fuel. Y.O.R.R. highly recommends the
use of safety tape and “No smoking/No open flame” signs in the area surrounding fuel storage and
transfer locations.
1.8 ENGINE and Transmission
1.8.1: ENGINE AND ENGINE DISPLACEMENT - stock no bigger then 170cc. NO Engine
MODIFICATIONS big bores, turbo, nitrous ect.... Aftermarket or Re-flashed ECUs Allowed.
Intake, Exhaust & Fuel Programmer Allowed
1.9 VEHICLE SAFETY EQUIPMENT
1.9.1: ROLLCAGES - Stock rollcages are allowed but Y.O.R.R. recommends aftermarket cages because
of the added strength and safety. It is each competitor’s responsibility to present a safe vehicle for pre-
event technical inspection. Competitors must maintain their safety equipment including the roll cage
integrity. Y.O.R.R. reserves the right to not allow any cage designs that, in the opinion of the Chief
Technical Inspector, is not fit for competition. Competitors are ultimately responsible for their vehicle’s
safety features, including the design, fabrication, quality of execution, maintenance, and repair of the roll
cage structure. The roll cage is considered to be the main 6-point structure that surrounds and protects
the vehicle’s occupants.
1.9.3: All welds must be of high quality, with good penetration and no undercutting of parent material.
1.9.4: All roll cage components (hoops, braces, gussets, etc.) must have a minimum of 3” of clearance
from any vehicle occupant’s helmet when occupant is seated in normal driving/riding position. All roll cage
components that might come into contact with the vehicle occupants’ helmets must be padded.
1.9.5: Roll cages must be securely mounted to the frame, chassis, or body. Roll cage mounting fasteners
must be at least 3/8” diameter S.A.E. or metric equivalent, Grade 8 or equivalent or better when utilizing
the stock mounting positions. Sandwich plates, if used, must be oriented only in the horizontal plane. No
vertical or other non-horizontal sandwich plate orientations are permitted.
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1.9.6: Roof Panel REQUIRED
1.9.7: All vehicles must include factory or aftermarket door with permanent or secondary latching system
to protect occupants in the event of a roll over, or collision. A chassis integrated door bar with an
aluminum skin is approved.
1.9.10: DRIVER RESTRAINT SYSTEMS - All vehicles must have a minimum of four-point H-style driver
restraint system for each occupant. Driver restraints must incorporate a lap belt, anti-submarine strap,
and shoulder straps.
1.9.11: The driver restraint system shall consist of one 2” wide anti-submarine strap, one 2” wide lap belt
and two 2” wide shoulder straps. Sternum straps and chest buckles may be used. Hybrid Head & neck
restraint belts allowed when used in conjunction with a head and neck restraint system. The use of some
form of neck protection is highly recommended.
1.9.12: Belt/strap material shall be nylon or Dacron polyester. Driver restraint system must be in new or
perfect condition with no cuts, frayed layers, chemical stains, or excessive dirt and must be in flexible
condition (i.e. material must not be stiff).
1.9.13: No portion of the driver restraint system may be altered in any fashion from the manufacturer’s
standard design.
1.9.14: All driver restraint systems must be properly mounted in accordance with manufacturer’s
directions and recommendations. Bolt in, wrap-around, and snap-in mounting styles are permitted, except
that lap belts may not be mounted by wrap-around method.
1.9.15: In addition to conforming to the manufacturer’s directions, driver restraint system installations
must also conform to the following:
1.9.15.A: The driver restraint system must be mounted to structural members able to withstand the load
the restraint system will place on them in a crash, without rupturing or failing.
1.9.15.B: Driver restraint must be matched to a properly constructed, fitted, and installed seat securely
mounted to the frame / chassis / roll-cage.
1.9.15.C: Seats must not be modified to create belt slots.
1.9.15.D: All belts should be as short as possible to minimize the belt's stretch.
1.9.15.E: Belt routing must allow webbing to pull in a straight line against anchor point. Mounting brackets
must be at an angle that is compatible with the direction of pull on the webbing.
1.9.15.F: Preferred anchor mount is a double-shear bracket.
1.9.15.G: Driver restraint systems must be mounted using high-quality hardware appropriate for the
installation. 1/2" or 7/16" OR Metric equivalent fine-thread Grade 8 bolts and Grade 8 deformed thread
locknuts (or better) are recommended.
1.9.15.H: Belts must not rub against any surface that will cause them to fray.
1.9.15.I: 3-bar slides must be located as close as possible to the anchor plate, or if belt is wraparound
style, to the bar around which they wrap.
1.9.15.J: Belts using non-sewn anchor plates must be wrapped back a fourth time through the 3-bar slide.
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1.9.15.K: Wrap-around style mounting should be confined to shoulder and 5th point belt installation and
must include some method to prevent lateral movement of the belts.
1.9.16: Driver restraint systems must be worn properly tightened, by all occupants; at any time the vehicle
is in motion.
1.9.17: SAFETY NETS - Approved safety nets are mandatory on all vehicles and must cover the
complete open area of the cockpit on both sides of the vehicle to the extent that it is impossible for any
limb or body part of any occupant to protrude from the vehicle at any time when the occupant is properly
seated and strapped in their normal driving / riding position.
1.9.18: Nets must be installed on the inside of the roll cage to prevent them from being damaged or
coming off in a roll over or slide on the side.
1.9.19: Nets attached to doorframes are permitted when Door frame is equipped with a latch that
prevents it from opening and locked permanently closed.
1.9.20: Nets must be installed so that the occupants can release the netting unassisted and exit the
vehicle regardless of the position of the vehicle.
1.9.21: The net border or edge and the net attachment must be made of materials that are as strong as,
or stronger than, the net itself. Net attachments must be at a minimum of every 6 inches. Acceptable
attachments include, but are not limited to: steel hose clamps, snaps, lift-a-dot, metal hooks, and steel
rods. Nets must be tight so that when subject to a pushing force of approximately 50lbs the net deflects
no more than four inches.
1.9.22: SEATING - All seats must be manufactured by a recognized manufacturer and approved for
racing application for human beings. Seats must be interchangeable between left and right sides. Mock
seats are not approved.
1.9.23: All seats must be securely mounted to frame of vehicle.
1.9.24: Adjustable track-type seat mounts must be securely mounted to frame of vehicle to allow no
lateral or vertical movement between seat and frame or mounting track and frame.
1.9.25: Headrests constructed of at least 2” thick resilient padding and being approximately 36 square
inches in area are required or the use of a high back seat.
1.9.26: Fire Extinguishers – It is required that each vehicle carry at least two fire extinguishers. The fire
extinguishers must be mounted so that one or both is accessible to the occupants and that one or both
are accessible to someone on the outside of the vehicle. In addition the mounts constructed in a manner
that will keep the fire extinguishers secure in the event of a roll over, collision, etc.
1.10 GENERAL VEHICLE COMPONENTS
1.10.1: The vehicle occupants must be able to easily enter and exit unassisted with the vehicle in any
position. Firewalls and/or bulkheads must separate the driving compartment from any fuels, engine fluids,
and acids.
1.10.3: Stock floorboards as delivered from manufacture are required on all vehicles. Floorboards must
cover the entire area from in front of the pedal assembly to behind the seat(s), and from the outside edge
to the outside edge of the vehicle.
1.10.4: No hazardous front or rear bumpers, nerf bars, frame heads or other protruding objects from
vehicles are permitted. Ends must be capped and rounded to prevent any sharp edges. Bumpers and
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nerf bars must be designed in a way that reasonably minimizes the chance of two vehicles becoming
locked together.
1.10.5: A rear view mirror is required on all vehicles. Mirrors must have at least six square inches of
mirror surface. Mirror must have a reasonably unobstructed view of area behind vehicle.
1.10.6: All spare parts and extra equipment carried on or in a vehicle must be securely attached or
stowed to prevent movement during competition. All spare parts and extra equipment must be carried in a
manner that minimizes the risk of injury to the vehicle occupants.
1.10.7: All vehicle body parts must remain on the vehicle (accidental damage excluded) during the entire
event.
1.11: IDENTIFICATION MARKERS
1.11.1: All vehicles in competition must be identified with the correct entrant number.
1.11.2: Entrant numbers shall be assigned to Drivers of Record on a first-come first-served basis.
1.11.3: Vehicles must display entrant numbers on both sides of vehicle. Numbers must have a
contrasting background such as white letters on a black background or black letters with a white
background. A reflective material would work best. Minimum 6” tall letters
1.11.4: Entrants participating in any series will be required to retain their number for all events in the
series.
1.11.5: Y.O.R.R. assumes no responsibility for scoring vehicles with unrecognizable numbers. It is the
vehicle driver’s responsibility to maintain numbers in recognizable condition. This includes mud, dust, etc.
If we can’t see your numbers we will not score your times.
1.11.6: Advertising, symbols, and names may be displayed on competition and support vehicles provided
that they do not interfere with required official identification markings and that they are in good taste as
judged by Y.O.R.R. sanctioned representatives.

1.0 Youth Production UTV
______
The Youth Production UTV class vehicles are built using production UTV’s, manufactured by registered
companies, i.e. Yamaha, Polaris, Can-Am that issues Vin #’s. Companies must produce a minimum of
1000 units per year to be accepted. NO Honda pilots, odysseys,... OEM engines must be used. 900cc
engine (MAX) 325cc (Min). Must use hood, grill, front and rear fenders from the UTV. Two seat youth
class for drivers aged 11-17 years. This class will run the full course with the 1600 class.
This is an open class and all components will be considered open unless restricted herein
Driver Safety Equipment
Helmets – Full face helmets are required for all occupants of the vehicle.
Fire Suits – Full fire suits are highly recommended for all occupants of the vehicle. At a minimum long
sleeve shirts and full length pants are required.
1.1 SUSPENSION COMPONENTS
1.1.1: FRONT SUSPENSION – stock
1.1.2: REAR SUSPENSION - stock
1.1.3: Shock Absorbers - stock
1.1.4: SECONDARY SUSPENSION – No secondary suspension allowed
1.2: WHEELS & TIRES
1.2.1: Tires shall be visually checked for condition and must not be considered obviously unsafe by the
Chief Technical Inspector.
1.2.2: Maximum tire size is unlimited.
1.2.3: Tire studs, screws, or any other items added to the tire are not permitted.
1.2.4: Grooving, sipping, or other modifications that involve removing material from the tire are permitted.
1.3: FASTENERS
1.3.1: It is recommended that all component parts of the vehicle’s steering, suspension, chassis,
drivetrain, and running gear be secured with fasteners suitable to the task, and in good working order.
Male threaded fasteners should be secured with either: lock nuts, lock washers, cotter pins or safety wire
and shall have at least one full thread showing through the nut.
1.5 BRAKES
1.5.1: Brakes are considered the system used for slowing and stopping the wheels.
1.5.2: Brakes must be able to apply adequate force to lock up all four tires. Brakes must be in a safe
operating condition and free of leaks during the entire event. If brake system problems occur during the
event they must be repaired before continuing in competition.
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1.5.3: Turning, cutting, or steering brakes are not permitted.
1.5.4: Aftermarket brake products are permitted.
1.5.5: Brake pedal(s) mounted in driver’s foot-well must be able to operate all brakes with a single foot.
Adjustable brake bias is not allowed. Factory brake pedal assembly needs to be retained.
1.5.6: Each vehicle should have a means of applying continuous brake pressure while vehicle is parked
with occupant(s) outside the vehicle. Hydraulic “line-locks” or mechanical “park” mechanisms are
permitted.
1.6 ELECTRICAL SYSTEM
1.6.1: IGNITION - Each vehicle must have a positive action on/off ignition switch. The switch must be
labeled “ignition on/off” and be located within easy reach of the driver and from the outside of the vehicle.
1.6.2: BATTERIES - Batteries must be securely mounted.
1.6.3: LIGHTS - All vehicles must have a minimum of two taillights, two brake lights and four rearward
facing safety lights that are bright enough to be seen, lights must be on at all times while vehicle is
running. The 4 required rear facing safety lights are; 1 steady amber, 1 flashing amber, 1 blue light
steady. All 3 of these safety lights must be LED, a minimum of 2000 lumens and 4 bulbs. THE 4th
MANDATORY REAR SAFETY LIGHT IS A SPEC BLUE STROBE LIGHT. THIS SPEC BLUE LIGHT
MUST BE PURCHASED FROM KC HILITES 928-635-2607. THIS LIGHT MUST BE MOUNTED AS
HIGH UP ON THE CAGE AS POSSIBLE AT A MINIMUM OF 48” AND REAR FACING. The amber
flashing and blue strobe is an attempt to identify the 1600 class vehicle, so that faster vehicles will be able
to recognize that they are approaching a slower vehicle. Safety lights must be approved by the YORR
1600 Tech Inspector. Federal Signal, Rigid, Tribal Whips and KC Hilites have been approved. Other
manufactures may be approved call the YORR 1600 Tech inspector for more information. Headlights are
required for events where any portion of the on-course event takes place between sunset and sunrise. If
during an event any required light fails to operate, the light must be fixed or replaced at the next available
pit before the vehicle can continue in the event.
1.6.4: STARTER - All vehicles must be self-starting by use of an onboard electric starter.
1.6.5: HORN – All vehicles must be equipped with a horn or siren. The horn or siren must be load enough
that it can be clearly heard over a running engine. The horn or horn switch must be mounted in a location
that can be reached by the driver or co driver while wearing a safety harness.
1.7. FUEL SYSTEM
1.7.1: FUEL - Any of the following commercially available fuels may be used:
1.7.1.A: Service station pump gasoline (the type normally used in passenger vehicles for highway
use, this also includes E85.)
1.7.1.B: Racing gasoline as manufactured
1.7.1.C: Commercial aviation gas
1.7.1.D: Diesel fuel (including bio-diesel)
1.7.1.E: Propane or natural gas.
1.7.1.F: Commercially produced, nationally advertised fuel additives may be used.
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1.7.1.G: No alcohol, or nitro-methane is permitted. Nitrous Oxide is not permitted.
1.7.2: Stock fuel systems - Unmodified stock fuel systems are approved
1.7.3: Modified fuel systems - Safety fuel cells are required for any vehicle that has modified its factory
fuel system. Safety fuel cells shall consist of a bladder enclosed in a smooth skinned container. The
container shall be constructed of 20-gage steel, 0.060 Inch aluminum, or 0.125 inch marlex. All fittings
must be built into the container skin and bonded to the container skin as an integral part of the tank or
mechanically sealed by a ring and counter-ring system by either flat joint or an O-ring. Internal baffling is
mandatory in all fuel cells. Foam is an acceptable internal baffling. Bladder construction shall be of nylon
or Delcron woven fabric impregnated and coated with a fuel resistant elastomer, rotary molded polymer
cells are acceptable when encapsulated in a container constructed of 20-gage steel, or 0.060 inch
aluminum.
1.7.4: Fuel tanks shall be mounted in a fashion to protect the tank from damage due to a rear-end or side
collision, impact from debris or rocks from below the vehicle, damage due to roll over, or the possibility of
damage from chassis flex. Firewalls and/or bulkheads must separate the driving compartment from any
fuels, engine fluids, and acids. Rear mounted Fuel cells higher than drivers shoulder must extend fire wall
to 2 inches above fuel cell.
1.7.5: Fuel filler lines and positive-locking, non-vented fuel filler caps must be located and secured in
such a manner as to prevent them from being knocked off or open during vehicle movement, rollover, or
accidental impact.
1.7.6: The fuel vent line if so equipped must vent outside of occupants’ compartment and be directed
away from the engine and exhaust system.
1.7.7: All fuel fillers attached to the frame or a body panel must use a flexible coupling to the tank. All fuel
fillers must be surrounded by a boot or splashguard. (Body panel is acceptable as a splashguard if it is
sealed.) Splashguard must direct fuel out of the vehicle and away from occupants.
1.7.9: Fuel mats are recommended for all refueling. No vehicles shall be refueled outside approved pit
locations. Storage of fuel in the pits shall consider safety the highest priority. Check with local event
restrictions concerning the storage, transportation, and transfer of fuel. Y.O.R.R. highly recommends the
use of safety tape and “No smoking/No open flame” signs in the area surrounding fuel storage and
transfer locations.
1.8 ENGINE and Transmission
1.8.1: ENGINE AND ENGINE DISPLACEMENT - OEM engines must be used. 900cc engine (MAX)
325cc (Min). NO Engine MODIFICATIONS big bores, turbo, nitrous ect.... Aftermarket or Re-
flashed ECUs Allowed.
Intake, Exhaust & Fuel Programmer Allowed
1.9 VEHICLE SAFETY EQUIPMENT
1.9.1: ROLLCAGES – Stock rollcages are allowed but Y.O.R.R. recommends aftermarket cages because
of the added strength and safety. It is each competitor’s responsibility to present a safe vehicle for pre-
event technical inspection. Competitors must maintain their safety equipment including the roll cage
integrity. Y.O.R.R. reserves the right to not allow any cage designs that, in the opinion of the Chief
Technical Inspector, is not fit for competition. Competitors are ultimately responsible for their vehicle’s
safety features, including the design, fabrication, quality of execution, maintenance, and repair of the roll
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cage structure. The roll cage is considered to be the main 6-point structure that surrounds and protects
the vehicle’s occupants.
1.9.3: All welds must be of high quality, with good penetration and no undercutting of parent material.
1.9.4: All roll cage components (hoops, braces, gussets, etc.) must have a minimum of 3” of clearance
from any vehicle occupant’s helmet when occupant is seated in normal driving/riding position. All roll cage
components that might come into contact with the vehicle occupants’ helmets must be padded.
1.9.5: Roll cages must be securely mounted to the frame, chassis, or body. Roll cage mounting fasteners
must be at least 3/8” diameter S.A.E. or metric equivalent, Grade 8 or equivalent or better when utilizing
the stock mounting positions. Sandwich plates, if used, must be oriented only in the horizontal plane. No
vertical or other non-horizontal sandwich plate orientations are permitted.
1.9.6: Roof Panel is REQUIRED
1.9.7: All vehicles must include factory or aftermarket door with permanent or secondary latching system
to protect occupants in the event of a roll over, or collision. A chassis integrated door bar with an
aluminum skin is approved.
1.9.10: DRIVER RESTRAINT SYSTEMS - All vehicles must have a minimum of four-point H-style driver
restraint system for each occupant. Driver restraints must incorporate a lap belt, anti-submarine strap,
and shoulder straps.
1.9.11: The driver restraint system shall consist of one 2” wide anti-submarine strap, one 2” wide lap belt
and two 2” wide shoulder straps. Sternum straps and chest buckles may be used. Hybrid Head & neck
restraint belts allowed when used in conjunction with a head and neck restraint system. The use of some
form of neck protection is highly recommended.
1.9.12: Belt/strap material shall be nylon or Dacron polyester. Driver restraint system must be in new or
perfect condition with no cuts, frayed layers, chemical stains, or excessive dirt and must be in flexible
condition (i.e. material must not be stiff).
1.9.13: No portion of the driver restraint system may be altered in any fashion from the manufacturer’s
standard design.
1.9.14: All driver restraint systems must be properly mounted in accordance with manufacturer’s
directions and recommendations. Bolt in, wrap-around, and snap-in mounting styles are permitted, except
that lap belts may not be mounted by wrap-around method.
1.9.15: In addition to conforming to the manufacturer’s directions, driver restraint system installations
must also conform to the following:
1.9.15.A: The driver restraint system must be mounted to structural members able to withstand the load
the restraint system will place on them in a crash, without rupturing or failing.
1.9.15.B: Driver restraint must be matched to a properly constructed, fitted, and installed seat securely
mounted to the frame / chassis / roll-cage.
1.9.15.C: Seats must not be modified to create belt slots.
1.9.15.D: All belts should be as short as possible to minimize the belt's stretch.
1.9.15.E: Belt routing must allow webbing to pull in a straight line against anchor point. Mounting brackets
must be at an angle that is compatible with the direction of pull on the webbing.
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1.9.15.F: Preferred anchor mount is a double-shear bracket.
1.9.15.G: Driver restraint systems must be mounted using high-quality hardware appropriate for the
installation. 1/2" or 7/16" OR Metric equivalent fine-thread Grade 8 bolts and Grade 8 deformed thread
locknuts (or better) are recommended.
1.9.15.H: Belts must not rub against any surface that will cause them to fray.
1.9.15.I: 3-bar slides must be located as close as possible to the anchor plate, or if belt is wraparound
style, to the bar around which they wrap.
1.9.15.J: Belts using non-sewn anchor plates must be wrapped back a fourth time through the 3-bar slide.
1.9.15.K: Wrap-around style mounting should be confined to shoulder and 5th point belt installation and
must include some method to prevent lateral movement of the belts.
1.9.16: Driver restraint systems must be worn properly tightened, by all occupants; at any time the vehicle
is in motion.
1.9.17: SAFETY NETS - Approved safety nets are mandatory on all vehicles and must cover the
complete open area of the cockpit on both sides of the vehicle to the extent that it is impossible for any
limb or body part of any occupant to protrude from the vehicle at any time when the occupant is properly
seated and strapped in their normal driving / riding position.
1.9.18: Nets must be installed on the inside of the roll cage to prevent them from being damaged or
coming off in a roll over or slide on the side.
1.9.19: Nets attached to doorframes are permitted when Door frame is equipped with a latch that
prevents it from opening and locked permanently closed.
1.9.20: Nets must be installed so that the occupants can release the netting unassisted and exit the
vehicle regardless of the position of the vehicle.
1.9.21: The net border or edge and the net attachment must be made of materials that are as strong as,
or stronger than, the net itself. Net attachments must be at a minimum of every 6 inches. Acceptable
attachments include, but are not limited to: steel hose clamps, snaps, lift-a-dot, metal hooks, and steel
rods. Nets must be tight so that when subject to a pushing force of approximately 50lbs the net deflects
no more than four inches.
1.9.22: SEATING - All seats must be manufactured by a recognized manufacturer and approved for
racing application for human beings. Seats must be interchangeable between left and right sides. Mock
seats are not approved.
1.9.23: All seats must be securely mounted to frame of vehicle.
1.9.24: Adjustable track-type seat mounts must be securely mounted to frame of vehicle to allow no
lateral or vertical movement between seat and frame or mounting track and frame.
1.9.25: Headrests constructed of at least 2” thick resilient padding and being approximately 36 square
inches in area are required or the use of a high back seat.
1.9.26: Fire Extinguishers – It is required that each vehicle carry at least two fire extinguishers. The fire
extinguishers must be mounted so that one or both is accessible to the occupants and that one or both
are accessible to someone on the outside of the vehicle. In addition the mounts constructed in a manner
that will keep the fire extinguishers secure in the event of a roll over, collision, etc.
Caterpillar: Confidential Green
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1.10 GENERAL VEHICLE COMPONENTS
1.10.1: The vehicle occupants must be able to easily enter and exit unassisted with the vehicle in any
position. Firewalls and/or bulkheads must separate the driving compartment from any fuels, engine fluids,
and acids.
1.10.3: Stock floorboards as delivered from manufacture are required on all vehicles. Floorboards must
cover the entire area from in front of the pedal assembly to behind the seat(s), and from the outside edge
to the outside edge of the vehicle.
1.10.4: No hazardous front or rear bumpers, nerf bars, frame heads or other protruding objects from
vehicles are permitted. Ends must be capped and rounded to prevent any sharp edges. Bumpers and
nerf bars must be designed in a way that reasonably minimizes the chance of two vehicles becoming
locked together.
1.10.5: A rear view mirror is required on all vehicles. Mirrors must have at least six square inches of
mirror surface. Mirror must have a reasonably unobstructed view of area behind vehicle.
1.10.6: All spare parts and extra equipment carried on or in a vehicle must be securely attached or
stowed to prevent movement during competition. All spare parts and extra equipment must be carried in a
manner that minimizes the risk of injury to the vehicle occupants.
1.10.7: All vehicle body parts must remain on the vehicle (accidental damage excluded) during the entire
event.
1.11: IDENTIFICATION MARKERS
1.11.1: All vehicles in competition must be identified with the correct entrant number.
1.11.2: Entrant numbers shall be assigned to Drivers of Record on a first-come first-served basis.
1.11.3: Vehicles must display entrant numbers on both sides of vehicle. Numbers must have a
contrasting background such as white letters on a black background or black letters with a white
background. A reflective material would work best. Minimum 6” tall letters
1.11.4: Entrants participating in any series will be required to retain their number for all events in the
series.
1.11.5: Y.O.R.R. assumes no responsibility for scoring vehicles with unrecognizable numbers. It is the
vehicle driver’s responsibility to maintain numbers in recognizable condition. This includes mud, dust, etc.
If we can’t see your numbers we will not score your times.
1.11.6: Advertising, symbols, and names may be displayed on competition and support vehicles provided
that they do not interfere with required official identification markings and that they are in good taste as
judged by Y.O.R.R. sanctioned representatives.

1.0 Sportsman Buggy Class 1600______
OPEN WHEEL - 1600cc
DEFINITION: Single or two seat vehicles limited to 1600cc VW engines and VW Type 1 suspension
systems.
This is an open class and all components will be considered open unless restricted herein
Driver Safety Equipment
Helmets – Full face helmets are required for all occupants of the vehicle.
Fire Suits – Full fire suits are highly recommended for all occupants of the vehicle. At a minimum long
sleeve shirts and full length pants are required.
1.1 SUSPENSION COMPONENTS
1.1.1: SHOCK ABSORBERS – Any number of shocks but no coilover or air shocks
1.1.2: BUMP STOPS - Hydraulic Bump stops are not permitted
1.1.3: SECONDARY SUSPENSION – No secondary suspension allowed
1.2: WHEELS & TIRES
1.2.1: Tires shall be visually checked for condition and must not be considered obviously unsafe by the
Chief Technical Inspector.
1.2.2: Maximum tire size is unlimited.
1.2.3: Tire studs, screws, or any other items added to the tire are not permitted.
1.2.4: Grooving, sipping, or other modifications that involve removing material from the tire are permitted.
1.3: FASTENERS
1.3.1: It is recommended that all component parts of the vehicle’s steering, suspension, chassis,
drivetrain, and running gear be secured with fasteners suitable to the task, and in good working order.
Male threaded fasteners should be secured with either: lock nuts, lock washers, cotter pins or safety wire
and shall have at least one full thread showing through the nut.
1.5 BRAKES
1.5.1: Brakes are considered the system used for slowing and stopping the wheels.
1.5.2: Brakes must be able to apply adequate force to lock up all four tires. Brakes must be in a safe
operating condition and free of leaks during the entire event. If brake system problems occur during the
event they must be repaired before continuing in competition.
1.5.3: Turning, cutting, or steering brakes are not permitted.
1.5.4: Aftermarket brake products are permitted.
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1.5.5: Brake pedal(s) mounted in driver’s foot-well must be able to operate all brakes with a single foot.
Adjustable brake bias is not allowed. Factory brake pedal assembly needs to be retained.
1.5.6: Each vehicle should have a means of applying continuous brake pressure while vehicle is parked
with occupant(s) outside the vehicle. Hydraulic “line-locks” or mechanical “park” mechanisms are
permitted.
1.6 ELECTRICAL SYSTEM
1.6.1: IGNITION - Each vehicle must have a positive action on/off ignition switch. The switch must be
labeled “ignition on/off” and be located within easy reach of the driver and from the outside of the vehicle.
1.6.2: BATTERIES - Batteries must be securely mounted.
1.6.3: LIGHTS - All vehicles must have a minimum of two taillights, two brake lights and four rearward
facing safety lights that are bright enough to be seen, lights must be on at all times while vehicle is
running. The 4 required rear facing safety lights are; 1 steady amber, 1 flashing amber, 1 blue light
steady. All 3 of these safety lights must be LED, a minimum of 2000 lumens and 4 bulbs. THE 4th
MANDATORY REAR SAFETY LIGHT IS A SPEC BLUE STROBE LIGHT. THIS SPEC BLUE LIGHT
MUST BE PURCHASED FROM KC HILITES 928-635-2607. THIS LIGHT MUST BE MOUNTED AS
HIGH UP ON THE CAGE AS POSSIBLE AT A MINIMUM OF 48” AND REAR FACING. The amber
flashing and blue strobe is an attempt to identify the 1600 class vehicle, so that faster vehicles will be able
to recognize that they are approaching a slower vehicle. Safety lights must be approved by the YORR
1600 Tech Inspector. Federal Signal, Rigid, Tribal Whips and KC Hilites have been approved. Other
manufactures may be approved call the YORR 1600 Tech inspector for more information. Headlights are
required for events where any portion of the on-course event takes place between sunset and sunrise. If
during an event any required light fails to operate, the light must be fixed or replaced at the next available
pit before the vehicle can continue in the event.
1.6.4: STARTER - All vehicles must be self-starting by use of an onboard electric starter.
1.6.5: HORN – All vehicles must be equipped with a horn or siren. The horn or siren must be load enough
that it can be clearly heard over a running engine. The horn or horn switch must be mounted in a location
that can be reached by the driver or co driver while wearing a safety harness.
1.7. FUEL SYSTEM
1.7.1: FUEL - Any of the following commercially available fuels may be used:
1.7.1.A: Service station pump gasoline (the type normally used in passenger vehicles for highway
use, this also includes E85.)
1.7.1.B: Racing gasoline as manufactured
1.7.1.C: Commercial aviation gas
1.7.1.D: Diesel fuel (including bio-diesel)
1.7.1.E: Propane or natural gas.
1.7.1.F: Commercially produced, nationally advertised fuel additives may be used.
1.7.1.G: No alcohol, or nitro-methane is permitted. Nitrous Oxide is not permitted.
1.7.2: Stock fuel systems - Unmodified stock fuel systems are approved
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1.7.3: Modified fuel systems - Safety fuel cells are required for any vehicle that has modified its factory
fuel system. Safety fuel cells shall consist of a bladder enclosed in a smooth skinned container. The
container shall be constructed of 20-gage steel, 0.060 Inch aluminum, or 0.125 inch marlex. All fittings
must be built into the container skin and bonded to the container skin as an integral part of the tank or
mechanically sealed by a ring and counter-ring system by either flat joint or an O-ring. Internal baffling is
mandatory in all fuel cells. Foam is an acceptable internal baffling. Bladder construction shall be of nylon
or Delcron woven fabric impregnated and coated with a fuel resistant elastomer, rotary molded polymer
cells are acceptable when encapsulated in a container constructed of 20-gage steel, or 0.060 inch
aluminum.
1.7.4: Fuel tanks shall be mounted in a fashion to protect the tank from damage due to a rear-end or side
collision, impact from debris or rocks from below the vehicle, damage due to roll over, or the possibility of
damage from chassis flex. Firewalls and/or bulkheads must separate the driving compartment from any
fuels, engine fluids, and acids. Rear mounted Fuel cells higher than drivers shoulder must extend fire wall
to 2 inches above fuel cell.
1.7.5: Fuel filler lines and positive-locking, non-vented fuel filler caps must be located and secured in
such a manner as to prevent them from being knocked off or open during vehicle movement, rollover, or
accidental impact.
1.7.6: The fuel vent line if so equipped must vent outside of occupants’ compartment and be directed
away from the engine and exhaust system.
1.7.7: All fuel fillers attached to the frame or a body panel must use a flexible coupling to the tank. All fuel
fillers must be surrounded by a boot or splashguard. (Body panel is acceptable as a splashguard if it is
sealed.) Splashguard must direct fuel out of the vehicle and away from occupants.
1.7.9: Fuel mats are recommended for all refueling. No vehicles shall be refueled outside approved pit
locations. Storage of fuel in the pits shall consider safety the highest priority. Check with local event
restrictions concerning the storage, transportation, and transfer of fuel. Y.O.R.R. highly recommends the
use of safety tape and “No smoking/No open flame” signs in the area surrounding fuel storage and
transfer locations.
1.8 ENGINE
1.8.1: ENGINE AND ENGINE DISPLACEMENT - VW type engine only with a maximum displacement of
1600cc. Dual port heads allowed. Any internal modification allowed. All other modifications ok
Low compression engine option, 8.5 to 1 limited to 1776cc single carb of any make with a max venture
size of 36mm, any heads all other modifications are allowed.
1.9 VEHICLE SAFETY EQUIPMENT
1.9.1: ROLLCAGES - It is each competitor’s responsibility to present a safe vehicle for pre-event
technical inspection. Competitors must maintain their safety equipment including the roll cage integrity.
Y.O.R.R. reserves the right to not allow any cage designs that, in the opinion of the Chief Technical
Inspector, is not fit for competition. Competitors are ultimately responsible for their vehicle’s safety
features, including the design, fabrication, quality of execution, maintenance, and repair of the roll cage
structure. The roll cage is considered to be the main 6-point structure that surrounds and protects the
vehicle’s occupants.
1.9.3: All welds must be of high quality, with good penetration and no undercutting of parent material.
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1.9.4: All roll cage components (hoops, braces, gussets, etc.) must have a minimum of 3” of clearance
from any vehicle occupant’s helmet when occupant is seated in normal driving/riding position. All roll cage
components that might come into contact with the vehicle occupants’ helmets must be padded.
1.9.5: Roll cages must be securely mounted to the frame, chassis, or body. Roll cage mounting fasteners
must be at least 3/8” diameter S.A.E. or metric equivalent, Grade 8 or equivalent or better when utilizing
the stock mounting positions. Sandwich plates, if used, must be oriented only in the horizontal plane. No
vertical or other non-horizontal sandwich plate orientations are permitted.
1.9.7: All vehicles must include factory or aftermarket door with permanent or secondary latching system
to protect occupants in the event of a roll over, or collision. A chassis integrated door bar with an
aluminum skin is approved.
1.9.10: DRIVER RESTRAINT SYSTEMS - All vehicles must have a five-point H-style driver restraint
system for each occupant. Driver restraints must incorporate a lap belt, anti-submarine strap, and
shoulder straps.
1.9.11: The driver restraint system shall consist of one 2” wide anti-submarine strap, one 3” wide lap belt
and two 3” wide shoulder straps. Sternum straps and chest buckles may be used. Hybrid Head & neck
restraint belts allowed when used in conjunction with a head and neck restraint system. The use of some
form of neck protection is highly recommended.
1.9.12: Belt/strap material shall be nylon or Dacron polyester. Driver restraint system must be in new or
perfect condition with no cuts, frayed layers, chemical stains, or excessive dirt and must be in flexible
condition (i.e. material must not be stiff).
1.9.13: No portion of the driver restraint system may be altered in any fashion from the manufacturer’s
standard design.
1.9.14: All driver restraint systems must be properly mounted in accordance with manufacturer’s
directions and recommendations. Bolt in, wrap-around, and snap-in mounting styles are permitted, except
that lap belts may not be mounted by wrap-around method.
1.9.15: In addition to conforming to the manufacturer’s directions, driver restraint system installations
must also conform to the following:
1.9.15.A: The driver restraint system must be mounted to structural members able to withstand the load
the restraint system will place on them in a crash, without rupturing or failing.
1.9.15.B: Driver restraint must be matched to a properly constructed, fitted, and installed seat securely
mounted to the frame / chassis / roll-cage.
1.9.15.C: Seats must not be modified to create belt slots.
1.9.15.D: All belts should be as short as possible to minimize the belt's stretch.
1.9.15.E: Belt routing must allow webbing to pull in a straight line against anchor point. Mounting brackets
must be at an angle that is compatible with the direction of pull on the webbing.
1.9.15.F: Preferred anchor mount is a double-shear bracket.
1.9.15.G: Driver restraint systems must be mounted using high-quality hardware appropriate for the
installation. 1/2" or 7/16" OR Metric equivalent fine-thread Grade 8 bolts and Grade 8 deformed thread
locknuts (or better) are recommended.
1.9.15.H: Belts must not rub against any surface that will cause them to fray.
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1.9.15.I: 3-bar slides must be located as close as possible to the anchor plate, or if belt is wraparound
style, to the bar around which they wrap.
1.9.15.J: Belts using non-sewn anchor plates must be wrapped back a fourth time through the 3-bar slide.
1.9.15.K: Wrap-around style mounting should be confined to shoulder and 5th point belt installation and
must include some method to prevent lateral movement of the belts.
1.9.16: Driver restraint systems must be worn properly tightened, by all occupants; at any time the vehicle
is in motion.
1.9.17: SAFETY NETS - Approved safety nets are mandatory on all vehicles and must cover the
complete open area of the cockpit on both sides of the vehicle to the extent that it is impossible for any
limb or body part of any occupant to protrude from the vehicle at any time when the occupant is properly
seated and strapped in their normal driving / riding position.
1.9.18: Nets must be installed on the inside of the roll cage to prevent them from being damaged or
coming off in a roll over or slide on the side.
1.9.19: Nets attached to doorframes are permitted when Door frame is equipped with a latch that
prevents it from opening and locked permanently closed.
1.9.20: Nets must be installed so that the occupants can release the netting unassisted and exit the
vehicle regardless of the position of the vehicle.
1.9.21: The net border or edge and the net attachment must be made of materials that are as strong as,
or stronger than, the net itself. Net attachments must be at a minimum of every 6 inches. Acceptable
attachments include, but are not limited to: steel hose clamps, snaps, lift-a-dot, metal hooks, and steel
rods. Nets must be tight so that when subject to a pushing force of approximately 50lbs the net deflects
no more than four inches.
1.9.22: SEATING - All seats must be manufactured by a recognized manufacturer and approved for
racing application for human beings. Seats must be interchangeable between left and right sides. Mock
seats are not approved.
1.9.23: All seats must be securely mounted to frame of vehicle.
1.9.24: Adjustable track-type seat mounts must be securely mounted to frame of vehicle to allow no
lateral or vertical movement between seat and frame or mounting track and frame.
1.9.25: Headrests constructed of at least 2” thick resilient padding and being approximately 36 square
inches in area are required or the use of a high back seat.
1.9.26: Fire Extinguishers – It is required that each vehicle carry at least two fire extinguishers. The fire
extinguishers must be mounted so that one or both is accessible to the occupants and that one or both
are accessible to someone on the outside of the vehicle. In addition the mounts constructed in a manner
that will keep the fire extinguishers secure in the event of a roll over, collision, etc.
1.10 GENERAL VEHICLE COMPONENTS
1.10.1: The vehicle occupants must be able to easily enter and exit unassisted with the vehicle in any
position. Firewalls and/or bulkheads must separate the driving compartment from any fuels, engine fluids,
and acids.
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1.10.3: Stock floorboards as delivered from manufacture are required on all vehicles. Floorboards must
cover the entire area from in front of the pedal assembly to behind the seat(s), and from the outside edge
to the outside edge of the vehicle.
1.10.4: No hazardous front or rear bumpers, nerf bars, frame heads or other protruding objects from
vehicles are permitted. Ends must be capped and rounded to prevent any sharp edges. Bumpers and
nerf bars must be designed in a way that reasonably minimizes the chance of two vehicles becoming
locked together.
1.10.5: A rear view mirror is required on all vehicles. Mirrors must have at least six square inches of
mirror surface. Mirror must have a reasonably unobstructed view of area behind vehicle.
1.10.6: All spare parts and extra equipment carried on or in a vehicle must be securely attached or
stowed to prevent movement during competition. All spare parts and extra equipment must be carried in a
manner that minimizes the risk of injury to the vehicle occupants.
1.10.7: All vehicle body parts must remain on the vehicle (accidental damage excluded) during the entire
event.
1.11: IDENTIFICATION MARKERS
1.11.1: All vehicles in competition must be identified with the correct entrant number.
1.11.2: Entrant numbers shall be assigned to Drivers of Record on a first-come first-served basis.
1.11.3: Vehicles must display entrant numbers on both sides of vehicle. Numbers must have a
contrasting background such as white letters on a black background or black letters with a white
background. A reflective material would work best.
1.11.4: Entrants participating in any series will be required to retain their number for all events in the
series.
1.11.5: Y.O.R.R. assumes no responsibility for scoring vehicles with unrecognizable numbers. It is the
vehicle driver’s responsibility to maintain numbers in recognizable condition. This includes mud, dust, etc.
If we can’t see your numbers we will not score your times.
1.11.6: Advertising, symbols, and names may be displayed on competition and support vehicles provided
that they do not interfere with required official identification markings and that they are in good taste as
judged by Y.O.R.R. sanctioned representatives.

STOCK MODIFIED CLASS RULES:
CLASS INTENT---- To keep costs to a minimum and fun to a maximum! This entry level class creates competitive racing comprised of various
makes and models of vehicles. The rules are set to allow reasonable modifications while keeping the overall costs minimal.
Technical inspections would be as if all drivers in the class would examine each vehicle as a group to determine if the intent of the
class is being met. This should be able to be done quickly and without tape measures, scales, etc.
1 Roll cage:
1.1 1.2 1.3 1.4 2 Fuel Tank:
2.1 3 Body Modifications:
3.1 Should conform to Score rules regarding tubing size, type, and vehicle weight
Roll cage must be mounted securely to the body or frame at 6 points
Roll cage must have a cross-brace running behind the front seats if stock buckets are used
Door bars required for all occupants, unless using full doors
Stock fuel tank is allowed and must be properly secured and protected
4 Engine: Stock look must be retained
3.2 Door skins are required
3.2.1 OEM removable or no door options do not require skins
3.3 Front inner fenders may be cut
3.3.1 Outer structure must retain the look of the vehicle
3.3.2 Fiberglass fenders are allowed
3.4 OEM tub must be retained
3.4.1 Pickups must have boxes or bedsides
3.4.2 Occupants must be shielded from rear wheels
Intent - Engines are not to be a high performance style; Aluminum heads, LS series, etc. long as engine is stock build.
Example: 350 Chevy into a Jeep
302 Ford into a Ranger
4.1 Engine must be located in the stock location
4.1.1 High horsepower modifications are not allowed
4.1.2 Headers, Intake, Carburetor upgrades are allowed
4.1.3 Engine must run on automotive pump gas
Radiator must be mounted in the factory orientation
Exhaust must have a baffled muffler and extend to the back of the front doors
Engine swaps are allowed as
4.3 4.2 5 Drive train:
5.1 5.2 5.3 Drive-train combination must match OEM orientation
Open to any axles and track width
Wheelbase must be +/- 4 inches as from OEM
6 Tires:
6.1 33” maximum, measured size
7 Suspension: Intent - To allow for modification and tuning but to retain stock suspension design
Example: ‘85 2wd Toyota Pickup must retain IFS front and rear leaves
‘84 Jeep CJ-7 must retain leaf springs on all four corners
‘92 Cherokee must retain a panhard bar and coils in the front and leaves in the rear
7.1 7.2 OEM mounting points maybe altered
Shocks - May run ONE of the following:
7.2.1 Maximum of one 2.0” remote reservoir per corner, in stock mounting points
7.2.2 Maximum of one 2.0" non-remote reservoir rebuild-able shock per corner, any mounting configuration
7.2.3 Any number of smaller than 2.0” non rebuild-able shock in any configuration
7.3 Air or hydraulic bump stops not allowed
8 Additional Modifications:
Vehicles that are close to but do not conform to the above requirements may be allowed to compete in Stock-Modified but will be
assigned a time penalty to offset said modifications.
Example: Overbuilt Engine - Time Penalty 5 - 10%
Altered Engine Placement - Time Penalty 5 - 10%
If penalty exceeds 10% you will be moved to the another class
Any questions regarding allowable modification or build questions should be directed towards:
Don Linder - donl@inlandtruck.com
Jason Paule - j asonpaule@hotmail.com
Craig Grunenfelder - roktgr@gmail.com
All alternative modifications will be posted on the Yellowstone Offroad Racing website for public view, as accepted.

The intentions of the Competition Modified Class Rules are to allow modifications
enhancing vehicle performance, while controlling the cost of competing.
Professionally built vehicles and those deemed by the Promoter as advanced
beyond Comp Mod will be asked to race in the Professional Class.
The top four finishing competitors in each Class will be subject to post race vehicle inspection for
rule compliance immediately upon race completion.
Any vehicle deemed by the Promoter or his designee to have purposely circumvented the rule(s)
may be forced to forfeit their finishing position or be disqualified.
The Promoter will have the final call in all decisions pertaining to Comp Mod Class Rules.
1. Roll cage:
1.1. 1.2. 1.3. 1.4. 1.5. 1.6. Should conform to S.C.O.R.E./BITD rules regarding tubing size, type, gusseting and vehicle weight.
Roll cage must be mounted securely to the frame at 6 points.
Door bars required for all occupants.
A single diagonal or ‘X’ support required in B pillar.
A rock/debris screen in the front window area is recommended.
In the event the Driver/Passenger doors/windows cannot be opened due to design or emergency, the
driver/passenger must be able to exit the vehicle through either the front or rear window opening
unimpeded.
2. Suspension:
2.1. Total length of actual suspension travel measured at the wheel may not exceed 17 inches front or 20
inches rear.
2.2. Coilover shocks up to 2.5 inch diameter are allowed.
2.3. Bypass shocks up to 2.5 inch diameter are allowed.
2.4. Coilover shocks allowed on front OR rear only.
2.5. Any ONE of the following set ups are allowed:
2.5.1.1. One Coilover shock per wheel. (front or rear only, not both)
2.5.1.2. Two - 2 inch diameter rebuildable/re-valvable/reservoir shocks per wheel.
2.5.1.3. One - 2.5 inch diameter shock per wheel.
2.5.1.4. Any number of OE shocks per wheel
2.6. Bypass, reservoir and Coilover shocks may NOT be mounted together in conjunction on the same axle,
control arm or wheel.
2.7. Air/hydraulic bumpstops allowed.
2.8. 2.9. Internal Bypass Coilover and Adjustable Reservoir shocks allowed.
Open to any axle or track width.
2.10. Driveshaft safety loops required 12” from front of each drive shaft.
3. Seats and Harness
3.1. Five point harness for driver and passenger (if equipped) required.
3.2. Race suspension style seat for driver and passenger required.
3.3. Harness correctly installed as per manufacturer.
3.4. Seat and harness must be mounted to roll cage.
3.4.1.1. Provision may be made if cab/cage is integral and substantial re-enforcement to mounting points is
apparent.
3.5. Window nets or arm restraints required for driver/passenger.
4. Engine:
4.1. Modified engines/engine swaps allowed.
4.2. Engines must remain in the factory installed position. MINOR allowances will be made for
inconsistencies with factory engine placement due to clearance/packaging for engine swaps.
4.3. Original factory installed engine mounting points (bolt holes/lower mounts etc) must be retained on the
vehicle frame as proof of original factory engine location.
4.3.1.1. It is the racers responsibility to be able to provide proof of the original factory engine location.
4.4. Engine relocation for performance advantage will be penalized.
2013 Competition Modified Class Rules
4.5. 4.6. 4.7. 4.8. 4.9. Engine placement must be front configuration only.
Mid-Engine or Rear-Engine configurations as designed by factory allowed. (IE: VW)
No nitrous or alcohol fueled engines allowed.
A ‘firewall’ separating the occupants from the engine/transmission compartments required.
Fuel cell with rollover safety vent and hose required.
4.10. Transmission scatter shield recommended.
4.11. Battery must be securely/mechanically mounted. Bungee cords, zip ties or cheap parts store tie downs
not allowed.
4.12. Vehicle must have a Battery ‘Master Switch’ capable of disconnecting and turning off all battery supplied
power.
4.13. Baffled ‘spark arrestor’ style muffler required to reduce fire danger on the course. (IE Open Headers,
‘Cherry Bomb’, and other ‘straight through’ design mufflers are forbidden)
5. Frame:
5.1. 5.2. 5.3. 5.4. Factory design length frame rails are required to be intact under the vehicle.
5.1.1.1. Allowances will be made for modifications due to clearance/suspension design.
The frame rail directly above the rear axle may be notched enough to allow further upward travel (bump)
of the rear end during full compression.
5.2.1.1. On full bump, the top of the rear end axle tubes may not break the plane of the top factory intended
frame rail.
5.2.1.2. The frame rearward of above mentioned axle notch must be retained..
Back halved or full tube chassis are forbidden.
Plating/boxing/re-enforcement of the stock frame is allowed.
6. Body:
6.1. 6.2. 6.3. 6.4. Vehicle must have the original and identifiable OE body design installed on the vehicle at the starting line:
Fenders, doors, hood, cab, quarter panels.
Jeeps, Broncos, Scouts and other vehicles with removable tops/doors may remove them for competition
if sufficient protection of driver/passenger is present.
Fiberglass replacement panels are allowed in OE positions.
Occupants must be shielded from rear wheels.
7. Additional Modifications:
7.1. Competition vehicles that do not conform to the above listed requirements will be evaluated by the
Promoter or his designee and may be allowed to compete in the Competition Modified Class.
7.2. If allowed to compete in said class, a time penalty of up to 10% per violation may be assigned to offset
the prohibited modification(s).
7.3. Penalties exceeding 10% may be moved up to Pro class at the Promoters discretion.
PLEASE NOTE: It is the Competitors responsibility to ensure that their vehicle
complies with the Class Rules! Vehicles found to be in violation of said rules
may be subject to being advanced one class, Time Penalties, or Disqualification!
The Pre-RaceTech Inspection is to identify and address Safety Issues, not ensure
compliance with Class Rules. Simply passing Tech Inspection does not
automatically qualify the vehicle for its class.
 

PRO CLASS
1. Suspension
1.1 Modified suspension front AND rear allowed
1.2 Coilover, Bypass, and Airbumps allowed
1.3 Driveshaft safety loops required 12 “ from front of each drive shaft
2. Roll Cage
2.1 2.2 2.3 2.4 Should conform to Score rules regarding tubing size, type and vehicle weight
Roll cage must be mounted securely to the frame at 6 points
“X” support required in B pillar
Door bars required for all occupants
3. Seat and Harness
3.1 Race Seat for driver and passenger (if equipped) required
3.2 Five point harness for driver and passenger (if equipped) required
3.2.1 Harness properly installed
3.3 3.4 Seat and harness must be mounted to roll cage
Window nets or arm restrains required for driver/passenger
3.5 Door bars are required
4. Engine
4.1 Modified engines allowed
4.2 No nitrous or alcohol
4.3 Fuel cell required
4.4 Transmission scatter shield recommended
4.5 Battery must be securely mounted. No bungee cords