motorbike sprocket Material :A3# steel ,45#steel and etc Heat treatment:high ... /38T/39T40T/41T/42T/43T etc.Front sprocket: 13T/14T/15T/16T/17T etc.Chain : 415,420,428,428H,520 etcMaterial: A3 ... , Mid-east, Asia ,South Amercia, USA, EuropeMain Model:Model of sprocket: AX100, JUPITER Z, JUPITER MX, BIZ100, BIZ125, BAJAJ, C70, C100 ...