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 48 tooth rear JT sprocket with a 520MX120G 120-Link 520MRace MX450cc Gold & Black clip link DID Chain Fits: Honda CRF450R 2004-2008