Replace or upgrade your worn chain and sprockets with this market leading sprocket kit featuring quality Tech 7 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 12 tooth front Tech 7 sprocket and 51 tooth rear Tech 7 sprocket with a 520DZ100G 120-Link 520DZ2 solid bush Gold & Black clip link DID Chain Fits: Honda NXR125 STREET 2004-2010 NXR125ES 2009-2010