1050 Lbs. 18 H.P. Stock Altered (Flat Head Only)
Contest open to riding
lawn and garden tractors. Standard lawn mower typed engines and
carburetors only. Tractor must be stock in appearance. 37 c.i. maximum
displacement for single cylinder flatheads. 48 c.i. maximum
displacement for twin flatheads. Maximum carburetor venturi size 1.200 inch. Governors are optional.
Porting and Polishing is allowed. Heads and block may be milled.
Camshafts may be re-ground. Only standard lawn mower parts may be used.
No after market intake or heads. Any typer tractor may be used in this
class. Any tire tread pattern may be used. Transaxles may be locked.
Maximum over-bore is 0.045.
