This is the Yamaha RD60, a 55cc, single cylinder, two stroke, street motorcycle. Weight: 163 Lbs. Maximum speed: 53 MPH Bore and stroke: 42 x 39.7 mm Compression ratio: 6.9:1 Length: 72″ Width: 24.8 ” Height: 38″ Wheel Base: 46.7″ Fuel Capacity: 2.1 Gallons Autolube oil capacity 1.1 quart. Tire Size: 2:50 x 17 Both front and rear.