Zach (with some help from Nate) installed a 70cc polini kit on my chappy. Coupled with the fact that I took the tiny wheels off and put moped sized ones on and that the bike in new condition could go 30mph even with restrictive exhaust and previous tiny wheels. 14 in the back 16 in the front. Performance exhaust and case matching soon to come. I'm gonna have the only fast chappy in moped army. Probably the only chappy. Because like me, chappys don't have much luck in the love department.