50 cc Motorcycle classified as a moped. Yamaha produced some 50cc motorcycles in the late 80s. They were YSRs. Neat little bikes but only have 12 inch wheels. Honda made a 50cc bike too. Only one year it was produced(1982). It is a Honda MB5. They were only capable of 55mph. If I was to get a sport bike, I would like to get a Derbi GPR. I'm happy with my tomos and my SR 250 I just bought.