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 520 x 98 non o-ring chain fits the following models 2010 Yamaha YFZ450X 2011 Yamaha YFZ450X Included is a 520 x 98 non o-ring chain black 1 master link clip style Tensile strength of 8200 pounds Factory Spec brand This chain is the appropriate length for stock gearing, swingarms, etc.