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1.) Engines: Must have originally been produced for riding lawn
mowers.
a. 5-22 horsepower single or twin cylinder. Up to 44 ci.
b. Four cycle, gas only,
c. Horizontal or vertical shaft.
d. Engine Modifications: Engine must be stock. No internal
modifications allowed. May be rebuilt, but will not exceed manufactured
stock specifications. No performance enhancing parts will be used.
Ignition must be stock. Older points systems may 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 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.
3.) Gas tank and fuel systems: Gas tank must be securely mounted
and reasonably protected. Pump fuel only, additives optional. In line fuel
shut off valve mandatory. No fueling a running engine. (Nitrous oxide,
Nitro methane, alcohol) MAY NOT BE USED.
4.) Throttles: Any type throttle may be used, twist grip, thumb
throttle, squeeze grip or foot pedal. Must operate freely and have
operable return spring.
5.) Safety Kill Switch: Must have a breakaway type, grounded
safety switch. (TETHER type switch is mandatory.) For example types
found on boats, wave runners, quad runners. The hook-up cord may be no
longer than 30 inches, or it may not reach no further than the back of the
drivers seat. If an electric fuel pump is being used, kill switch must
disengage electrical power to all circuits.
6.) Transmission / Rear axles: Must be from a lawnmower. Solid
axle recommended, Differential may be locked. May be strengthened or
remade from heavier steel. The maximum width of the axles is 38 inches (that's the measurement from outside tire to outside tire.)
7.) Frame / Spindles: Must use lawnmower frame, may be
reinforced . May be a minimum of 6 inches off ground at lowest part
of frame. It may be no longer than 60"inches long (That's the
distance from front spindle to rear axle.) Front axle may be pinned,
bolted, or welded in place. No type of suspension, Rubber snubbers may be
used to dampen center pivoted front axles. SPINDLES- 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 recommended on front spindles,( Pinned, bolted,
welded, or a nut to keep on front tire and wheel. (A standard C-Clip
that's on most mowers is not sufficient ,but may be used with another type
of locking device.)
8.) Tires and Wheels: You may use steel or aluminum wheels.
6 inch front and 8 inch rear. Wheels with bearings instead of bushings
are highly recommended. (FRONT TIRES MUST HAVE TUBES.) No ATV, Snow hogs,
or Go-kart tires allowed. Turf style tires only. No larger than 20 inch tires. If using wheels with bushings the bushings must be in good
condition.
9.) Belts/ Pulleys/ Chains: Any pulley configuration allowed.
Any pulleys or belts exposed must have guards or covers. No torque
converters or centrifugal clutches allowed.
10.) Brakes: Brakes must be in working order. Better braking
systems are highly recommended.
11.) Body: Body must be stock, All body parts must be mounted
securely. Hood must also lock in place. And body should be clean and
painted with numbers at least 4 inches tall.
12.) Bumpers: Safety bars, Front bumper not
recommended, but allowed. May not exceed half the width of the front tires.
It may not exceed more than 2 inches past the front tire. Rear bumper
may not exceed the width of the rear tires. And may not exceed more than
2 inches past the 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. Foot pegs are not allowed.
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