Bone Stock Rules
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- All plastic must be removed from the mower.
- All mowers must be front-engine, belt-driven lawn mowers.
- No garden tractors permitted.
- 3/4" axles only.
- Any wheel and tire setup is permitted.
- No pulley swaps.
- All stock parts must remain stock.
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- Front pivot joint may be bolted solid for a stiff suspension.
- No welding allowed for suspension modifications.
- Steering, seat, and fenders may be adjusted for comfort only.
- Modifications may not strengthen the mower.
- Headers, pedals, and shifters are permitted.
- Cable shifter brackets may be mounted to the body or frame.
- Maximum weld length for shifter bracket mounting is 2 inches.
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- Absolutely no welding or reinforcing inside or outside the hood.
- Plastic grill inserts may be replaced with sheet metal if desired.
- Hood may be secured with bolts or wire in four (4) locations only.
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### Factory Bumpers
- Factory lawn mower bumpers are permitted.
- Must be bolted only.
- Maximum of two mounting points per side.
### Homemade Bumpers
- Homemade bumpers are permitted.
- May be welded or bolted.
- May only be welded to the frame.
### Specifications
- Maximum bumper shock length: 5 inches.
- Minimum gap between bumper and frame: 1 inch.
- Maximum material size: 2" x 2" x 1/8".
- Front bumper must be flat.
- Maximum bumper width: 17 inches.
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- Cage may only be welded to sheet metal.
- No part of the cage may touch the frame.
- Cage must begin at least 8 inches behind the front tire.
- Cage must stop before the rear axle.
- Cage may not connect to bumper shocks.
- Maximum cage height: 13 inches from bottom to top.
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- Absolutely no welding on the frame except:
- Approved 5-inch bumper shocks.
- Approved homemade bumper mounting.
- Body may NOT be welded to the frame.
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- Gas tanks must be securely mounted at all times.
- Unsecured gas tanks will result in immediate disqualification.
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### First Roll Over
- If the mower is flipped back over and still running, competition may continue.
### Second Roll Over
- Driver is eliminated.
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The following are required at all times while competing:
- Helmet
- Eye Protection
- Long Sleeve Shirt
- Long Pants
Failure to wear required safety equipment will result in disqualification.