I'm partial to the engine kits myself, the weedwacker/chainsaw builds are great - but they do require a bit more fabrication usually and I find the Chinese engine kits a bit more ascetically pleasing... I'm not 100% sure as I've not built one myself, but I think the chopper needs a jackshaft or an offset engine mount because the frame/tire width?
Regardless, many a chopper has been motorized with great results and I bet that one of the guys that has built one will be more than happy to give ya more of an answer than I can lol - ya outa post a pic of the bike yer workin' with! You'll just need one more post, then you'll be allowed to post links/pics - we do that to thwart the evil spammage
