New and Made to last this Viper drive is well made . I believe they were made for Island Hoppers out of Fla. back in the day. TC300 49cc Comes complete with paperwork. $350 shipped . http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&toolid=10001&campid=5335809022&icep_item=164556225797
Yep motorizing it is pretty dangerous..But if your going to do it maybe just get a electric 36v Rear hub motor kit or a used scooter. Just enough power to give ya a good owie.....wear a helmet and have fun!