hello, just stumbled upon this site doing some reading on motorizing a bike and have a few questions. the main one being where do i buy an engine kit from? i have searched around and looked at a lot of different sites some seem sketchy, the prices are all over the place. ebay is them same way, just wondering where you guys would recommend buying an engine kit from, as far as price and availability goes? im looking for under 50cc. my plans are to put it on a 26" cruiser and make an older looking motorbike/rat bike, just think that would be cool. also was wondering if if was at all possible to put one on a 20" bike, i know i have read that it doesnt fit im still curious if anyone has done it, only reason i ask, is right now i have a 20" bike and i dont have a 26" bike . thanks, cant wait to get my project going!