Originally posted by muteboy49
the kit im going to buy for my motor said it will give me a 8.6:1 CR with the 76cc heads but im putting a bigger cam in it for a 9:1 ish CR
what kind of lift can these heads take?
You will need ither a flat top or a .100 dome to meet the 9:1 requirement otherwise, it is a waste to have the big cam. you can shave the heads a little and that will help but then you need to re cc the heads to get an accurate comp ratio calculation. The heads can be machined to fit almost anything I think. I'm not shure with there stock form.