Do not send us an email or note specifying what length chain you need. You must ORDER the correct length. BUYER must check chain length needed before ordering. Any info provided by seller regarding stock length is to the best of our knowledge, but seller is NOT responsible for chain that is ordered incorrectly. Any return for different length chain will be at buyer's expense, including shipping both ways. PLEASE check BEFORE ordering. This brand new, o-ring chain sprocket kit will give your ATV better acceleration fits the following models 2004 Yamaha YFZ450 2005 Yamaha YFZ450 2006 Yamaha YFZ450 2007 Yamaha YFZ450 2008 Yamaha YFZ450 2009 Yamaha YFZ450 2012 Yamaha YFZ450 2013 Yamaha YFZ450 ***Will not fit YFZ450R or YFZ450X models*** Included is 1 520 x 98 blue, o-ring chain chain may need to be cut to length 1 Master link clip style 1 14 tooth front sprocket 1 39 tooth rear sprocket Tensile strength of 8200 pounds Factory Spec brand Stock gearing for this model is 14/38 with a 520x96 chain Factory Spec brand sprockets are made of hardened steel and built to last O-ring style means it will last longer with less maintenance than conventional chains A stock photo is used, you will receive the kit described in the listing