1050 Lbs. 20 H.P. Stock Altered
Contest open to riding lawn and garden tractors. Standard lawn mower typed engines and carburetors only. Tractors must be stock in appearance. 37 c.i. maximum displacement for single cylinder flatheads. 50 c.i. maximum displacement for twin flatheads. 40 c.i. maximum displacement for OHV. Maximum carburetor venturi size is 1.200 inch. Governors are optional Porting and Polishing is allowed. Heads and block may be milled. Camshaft may be re-ground. Only standard lawn mower parts may be used. No aftermarket intake or heads. Any type tractor tire may be used in this class. Any tread pattern is allowed. Transaxles may be locked. Maximum over-bore is 0.045.
