I have been looking at the Kits for a while... I have a donor bike in mind Just a walmart special all terrain model. Should have plenty for frame space. I have my mind made up on a 4 stroke kit. I was hoping for a honda engine, but most kits I seen do not use the honda. Guess the other common one must be decent I don't see a lot of complaints. I have seen chain and belt drive options. Eventually I would like to add the jackshaft/shift kit so I can **** the rear derailleur. Not sure if you are limited to chain drive. My only last item, I hate the gas tanks. Really don't like the motorcycle style tank. Rather not have something on the top bar..