Stock Limited

AGE GROUP: Must be at least 8 years old and up.

This class will have a max speed limit and is open to different mower types and engine choices designed to be a competitive yet affordable class.

Engine: Max 18hp governed at 3650 rpm absolutely no modifications allowed. 

Fuel: Pump gas is the only fuel acceptable.

Fuel pump: No electric fuel pumps allowed. Must be OEM vacuum or mechanical fuel pumps.

Drive train: Open to live axle or transaxle, chain or belt drive, transmission or RAGB (right angle gear box) for vertical shaft engines jackshaft for horizontal engines. Centrifugal clutches are recommended. No torque converter type progressive snowmobile clutches allowed. Where drive train is exposed to driver it must be covered up.

No shifting gears once the lawnmower is up to speed.

Chain Guards: All chain guards are mandatory and must be made from 1/8” aluminum or steel.

Steering: Direct steering is mandatory. Alternate steering methods must pass critical tech inspection. No plastic steering wheels unless it is reinforced with steel. No handlebars, to prevent driver from being pierced in the event of a rollover.

Wheelbase and max width: Min wheelbase is 42”, max width is 42” measured with a Go/No Go gauge. Tire side wall may stick out past the rim or rim may be the widest point, if the 42” gauge fits over your machine it is legal.

Frame: Ride height min 2” must retain stock dash or cowl.

Brakes: Aftermarket hydraulic brakes mandatory. If transaxle is used the brakes must be mounted on the right side axle.

Wheels: Aluminum race wheels and hubs only. Max 8” diameter rear rims and Max 6” diameter front rims to reduce climbing.

Tires: Commercially available Turf type tires mandatory. No race tires, paddle tires or snow hog tires.

Bumpers: Rear closed loop bumpers are mandatory. Width cannot be greater than rear tires. It is recommended to lay the bumper back 20 degrees when installing to prevent climbing. Front bumper is optional. If front bumper is installed, it cannot be more than 2” ahead of hood or front tires whatever protrudes ahead the farthest. Front bumpers cannot cover up front tires.

Side crash bars: Left and right side crash bar mandatory, must be flush or inboard of wheels no more 1.5” front outside. Crash bars must be filled in enough on the sides so driver’s foot cannot get caught in the event of a roll over.

Minimum weights: Minimum weight with driver is 375lbs.

Body/Hood: Hood and fenders can be home made but must resemble a lawn tractor. NO SHARP EDGES! Sharp edges are a hazard in the event of a roll over on homemade panels/spoilers.