How about going for electric motorbike conversion using scrap material? Sounds cool! Marquee has done the same by converting a Honda rebel 250 into a clean calm bike in about a week. Many of the required parts were taken from the old rebel rolling chassis including wheels, tires, brakes, and other missing parts. After that, he attached a new Perm132 motor, golf cart controller, charger and throttle to the bike. And, the upshot was a clean silent bike.