Ok, I just recently rebuilt my son 212cc none hemi engine. It's on a typical race kart. Engine now has acr billet rod, dynocams 265 camshaft, head shaved .080 and ported, 22lb valve springs, pvl flywheel and a .670 bored carb. Makes great power to 8k, seems like it wants to go higher but I'm not taking it there. But it has a cheap basic clutch and it sucks takin off. Gearing is 62t out back and 13t on clutch. I'd like some options on what people use now that grabs really good. We just use the kart for drag racing 330ft and zipping up n down the street. Dont wanna spend more then around $130,thanks!!!