All Karts must have a muffler
Rotary valve or Reed valve Two-Stroke Cycle Engines
1. Single Cylinder Small Displacement 2-Cycle Engines
2. Single Cylinder Large Displacement 2-Cycle Engines
3. Multiple Engine 2-Stroke (No common crankcase multiple cylinder engine.)
Flat Head Four-Stroke cycle Engine
1. 190 lbs. plus one pound for every 3cc or fraction of a cc. multiple engines or cylinders are permissible.
2. 500cc maximum total displacement with a tolerance of 10cc when checked
Pistion Port Two-Stroke Cycle Engine
1. 130 lbs. plus one pound for each cc or fraction of a cc.
2. Multiple engines or cylinders are Permissible
Overhead Cam (SOHC or DOHC) Four-Stroke Cycle Engine
1. Overhead cam engine or engines, multiple cylinders permitted. 500cc maximum displacement +/- 10cc when checked.
2. Minimum weight as follows; 205 lbs. plus 1 lb. for every 2 cc’s or fraction of a cc. Any engine or combination of engines from 450cc to 500cc are capped at a minimum weight of 430 lbs. unless power adders are used.
Overhead valve (OHV-Push Rod) Four-Stroke cycle Engine
1. 200 lbs. plus one pound for every 2.5cc or fraction of a cc. multiple engines or cylinders are permissible, 500cc maximum total displacement with a tolerance of 10cc when checked.