Basics of the engine rules:
* Rotary or reed value 2-stroke: 230 lbs. plus 1 pound for each cc. 217cc maximum displacement.
* Flat head 4-stroke: 190 lbs. plus one pound for every 3 ccs. Multiple engines or cylinders permissible. 500 cc maximum total displacement. Single cylinder from 501-510 cc is allowed at 430 lbs.
* Piston port 2-stroke: 170 lbs. plus one pound for every cc. Multiple engines or cylinders are permissible. 225cc maximum displacement. Single cylinder from 226-255cc is allowed at 430 lbs.
* Overhead cam 4-stroke: 120 lbs. plus one pound for every cc. Multiple engines or cylinders are permissible. 305 cc maximum displacement. Single cylinder engine 306-510cc displacement is allowed at 430 lbs.
* Overhead valve 4-stroke: 200 lbs. plus one pound for every 2.5ccs. Multiple engines or cylinders are permissible. 500 cc maximum total displacement. Single cylinder 501-510 cc is allowed at 430 lbs.
* Single rotor rotary (Wankel) engine: 295cc maximum displacement. Weight 135 lbs. plus one pound for each cc. (295cc engine runs at 430 lbs). Engine must be normally aspirated.
If a kart is equipped with turbocharger or nitrous oxide, add 15 lbs. for each cylinder served by the system.
http://www.unlimitedallstars.org/ <------------- HERE ARE THE COMPLETE UAS RULES...
