• Must have originally been produced for riding lawn mowers.
• 5-20 horsepower, single or twin cylinder.
• Four cycle gas only.
• Horizontal or vertical shaft.
• Engine modifications: Engine must be stock. No internal modifications allowed. May be rebuilt, but will not exceed manufactured stock specifications. Performance enhancing parts can be used (updated factory parts such as, rods, pins, etc.). Ignition must be stock. Older points systems can be upgraded to electronic ignition. External modifications limited to different carburetor, removal of stock exhaust, replacing with header type, disconnecting governor, and replacing or modifying the air filter. Exhaust must be directed down or to the rear of mower. Crankcase ventilation system may also be modified.

    2. STARTERS:

• Electric or pull start only. No push starts.
• Battery must be securely fastened. Terminals must be insulated with covers or heavy tape.

    3. GAS TANK & FUEL SYSTEM:

• Gas tank must be securely mounted and reasonably protected. Pump fuel only, addatives optional.
• In line fuel shut off valve mandatory. No fueling a running engine. ( nitrous oxide, nitro methane, alcohol prohibited)

    4. THROTTLE:

• Any type throttle may be used, twist grip, thumb throttle, squeeze grip, or foot pedal. Must operate freely and have operable return spring.
• No fixed throttles.

    5. SAFETY KILL SWITCH:

• Must have breakaway type grounded kill switch. Teth ertype is mandatory. (those found on boats, wave runners, or quad runners.)
• If an electric fuel pump is used, kill switch must disenguage electrical power to all circuits.

    6. TRANSMISSION / REAR AXLE:

• Transmission must be from a lawnmower. Solid axle recomended. Differentials may be locked up. May be strengthened or remade from heavier steel. The maximum width is 38 inches. (measurement from outside of tire to outside of tire)

    7. FRAME / FRONT AXLE:

• Must use a lawn mower frame, may be reinforced. May be a minimum of 6 inches off the ground to lowest part of frame.
• May be no longer than 60 inches long from spindle to rear axle.
• Front axle may be pinned, bolted, or welded.
• No go-kart type spindles allowed. Spindle bushings must be in good condition. Steering arms and tie rods must be a minimum of 3/8 inch diameter.
• Double locking device highly recomended on front spindles.(Pinned, bolted, welded, or a nut to keep front tire and wheel on. A standard c-clip that's on most mowers is not sufficient, but may be used with another type of locking device.)
• Front axle may be fabricated from heavier steel, not to exceed 38 inches wide, outside of tire to outside of tire.
• Camber and caster may also be modified.

    8. TIRES & WHEELS:

• You may use steel or aluminum wheels, 6 inch front and 8 inch rear.
• Wheel with bearings instead of bushings recomended.
• Front tires must have tubes.
• No ATV, snow hogs, or go kart tires allowed. Turf tires only.
• No larger than 20 inch tires.

    9. BELTS / PULLEYS / CHAIN:

• Any pully configuration allowed.
• Any pullys, belts, or chain exposed must have guards or covers.
• No torqu converters or centrifugal clutches allowed.

    10. BRAKES:

• Brakes must be in working order. Better braking systems are highly recomended.

    11. BODY:

• Body must be stock. All body parts must be securely mounted. Hood must also lock in place.
• The body should have contrasting numbers, one on each side and one on the rear.
• A form of mowing deck must be used to appear to be a lawnmower. Stock mowing decks may be cut down or running boards designed to look like a mowing deck may be used. Deck must be 2 1/2 inches from the ground or higher.
• Steering wheels or handle bars allowed.
• Must use a lawnmower seat. Cannot be mounted lower than top of rear tires.

    12. BUMPERS:

•  Safety bars and front bumper are not reccomended, but allowed. May not exceed half the width of the front tires. It may not exceed more than 2 inches in front of the front tire.
• Rear bumper may not exceed the width of the rear tires, and may not exceed more than 2 inches behind the rear tires. Running boards or mowing deck may not exceed the width of the tires, and must be securely fastened to the frame of the mower.
• Mowing deck may exceed the width of the tires in stock form. it may not be widened and can be used for running boards.
• Foot pegs not allowed.