I Just bought a folding mini bike made from square steel stock with folding handle bars and a two cycle motor marked Fuji Motor and no ferings or fenders. It is driven with a belt to a jack shaft and chain to the rear tire. It has Nitto tires and a hand throtel. I will try and get some pics later. it resembles a small scooter with a floor up front. I think it may be an early 60's Jap model.
Brad
Brad