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Motorhead Events » Demo Derby » Lawnmower Rules
Lawnmower » Rules

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  1. Mower must be a factory available lawn mower. (NO HOME MADE FRAMES) (NO Garden tractors).
  2. Engine must be factory lawn mower engine such as Briggs & Stratton, Tecumseh, Onan ETC. and no rear engine mowers are allowed.
  3. All frame modifications and frame reinforcing will be allowed must be contained inside the hood and not visible to the crowd.
  4. Transaxles must be factory available mower transaxles but any reinforcing and or welding of spider gears is permitted.
  5. Engine bay reinforcing is permitted but must be contained inside the hood and must maintain factory body lines and not visible to the crowd.
  6. All mowers must run a factory hood and fenders and have the hood either screwed or welded down to the dash panel around drivers area ( Note if hood is fiberglass or plastic you can make one out of sheet metal only but must be the same size as the fiberglass one)
  7. Mowers must have good brakes and forward and reverse gears at the start of the heat.
  8. Gas tank must be secured and have a cap on it ( Any gas at all leaking and you will be disqualified).
  9. Leg guards are mandatory and must be bolted or welded from rear fender to front of foot rest or frame and can not attach to front or back bumper. (IF LEG GUARDS COME OFF YOU WILL BE DISQUALIFIED)
  10. A rear bumper is permitted but is not allowed to extend more then 4 inches out and it can not be any wider then the outside of thetires also it can not attach to the leg guards or front bumper you may build a back support but cannot attach to the back or front bumper no spikes, sharpe edges or any pertusions allowed ( bumper can be home made with I/H beam or square tubing. Call for questions)
  11. Regearing and changing of pulleys to increase speed is permitted All drive train modifications must stay belt driven
  12. Any and all drive train modifications is permitted but must stay belt driven.
  13. All mowers must use lawn mower type tires only. Cut tires will be permitted, air in tires only. No foam filled or solid tires(no four wheeler tires) . No tire chains or dual wheels will be allowed. You may glue or screw tires to rims. Valve stem protection allowed
  14. All head lights, mower decks and any other glass and plastics must be removed before you enter the pits.
  15. If you use a battery it must be securely mounted and coverd with a non flammable material.
  16. Front bumpers. No pointed bumpers. Bumpers must be flat with no sharp edges. Not to exceed 3” channel or 3”x3” square tubing. 2” Space max between mower and front bumper. Bumper can not stick out past front tires (width of mower) you may build behind the grill to hit with. The front of the mower must be a smooth finish for safety.
  17. Role-over and you are out for the heat/feature
  18. For safety if a mower does role over then stop until the mower is up right and the driver is off the track.
  19. Please put your number on both sides of the mower or your helmet so we can track the winners.
  20. No profanity allowed on the mowers or helmets or you will not be allowed to participate.
  21. All drivers must wear a helmet and boots. No shorts or cut off shirts. Long sleeve shirts are highly recommended.
  22. You will have 60 seconds to hit another mower that is still running or you will be disqualified.
  23. You will be allowed to restart but you can not move from your seat to do it or you will be flagged out.
  24. No pull start mowers

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Motorhead Events 2010 - 2011 Event Schedule

Demolition Derby &
Figure 8 Races
December 3rd & 4th
Columbia, Missouri
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The Indoor Winter Nationals
December 5th 2010
Columbia, MO
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American Arenacross
Dec 10th & 11th 2010
Columbia, MO
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Columbia TT Challenge
CANCELLED!

American Arenacross
Jan 7th & 8th  2011
Springfield, MO
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Demolition Derby &
Figure 8 Races
Jan 15th 2011
Lebanon, MO
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The Indoor Winter Nationals
Feb 4th & 5th 2011
Springfield, MO
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The Springfield Enduro X
Feb 18th &19th 2011
Springfield, MO
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The Indoor Winter Nationals
March 5th 2011
Lebanon, MO
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Demolition Derby &
Figure 8 Races
March 18th &19th 2011
Springfield, MO
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