... A3 steel(1023), 45#steel(1045), 16Mn Motorcycle Rear Sprocket Motorcycle rear sprocket, motor sprocket, sprocket wheel, motorcycle sprocket wheel ... wheel, inner sprocket, set sprocket,motor gear, motor front gear, motor rear gear, motorcycle sprocket, motorcycle set sprocket, motor complete ... per your sample, specification and drafts. Teeth Option1. Front sprocket teeth option: 12T/13T/14T/15T/16T/17T, ...