^^^ did I not just say I didn't know what it was? read the damn posts!! It has something to do with the intake or some crap I don't know really and yes they do have a valve, just not the kind of valves you guys are thinking of. They have a valve that lets air into the engine that's part of the carb just like any other motor. I know how a rotary works so quit bitching about a stupid valve!

There's like a spring powered valve that adds either air or fuel (can't remember) when you romp on it, that he modified to open earlier.