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 14 tooth front JT sprocket and 37 tooth rear JT sprocket with a 420D120 120-Link 420D standard DID Chain Fits: Honda XR50R 2000-2003