... ,ANSI,BS,JIS 3.Various hardness Motorcycle parts sprocket specification 1. Motorcycle parts sprocket rear sprocket 34T/35T/36T/37T/ ... sprocket : 13T/14T/15T/16T/17T etc. 4. Motorcycle parts sprocket main market : Domestic, Africa, Mid-east, Indonesia , ... Europe, USA and worlwide. 5. Motorcycle parts sprocket heat treatment :High frequency quenching ,Carburization…Heat treatment6. ...