Replace or upgrade your worn chain and sprockets with this market leading sprocket kit featuring quality JT Sprockets and D.I.D chain brought to you by THS Moto. Note the chain may need to be adjusted to length using a chain breaker tool. This Sprocket Kit contains a 13 tooth front JT sprocket and 50 tooth rear JT sprocket with a 428V118 118-Link 428V FJ O-Ring clip link DID Chain Fits: Honda CRF100F 2004-2014 XR100 1981-1984 XR100R 1985-2003