Manufactured by Factory Spec Rear Sprocket for Yamaha ATV 38 tooth, rear steel Sprocket 520 pitch Made in China This sprocket may not be the stock size for all models it fits. When changing sprocket sizing, a different length chain may be needed Fits the following 2004 Yamaha Raptor 350 YFM350R 2004 Yamaha YFZ450 2005 Yamaha Raptor 350 YFM350R 2005 Yamaha YFZ450 2006 Yamaha Raptor 350 YFM350R 2006 Yamaha Raptor 700 YFM700R 2006 Yamaha YFZ450 2007 Yamaha Raptor 350 YFM350R 2007 Yamaha Raptor 700 YFM700R 2007 Yamaha YFZ450 2008 Yamaha Raptor 250 YFM250R 2008 Yamaha Raptor 350 YFM350R 2008 Yamaha Raptor 700 YFM700R 2008 Yamaha YFZ450 2009 Yamaha Raptor 250 YFM250R 2009 Yamaha Raptor 350 YFM350R 2009 Yamaha Raptor 700 YFM700R 2009 Yamaha YFZ450 2009 Yamaha YFZ450R 2010 Yamaha Raptor 250 YFM250R 2010 Yamaha Raptor 350 YFM350R 2010 Yamaha Raptor 700 YFM700R 2010 Yamaha YFZ450R 2010 Yamaha YFZ450X 2011 Yamaha Raptor 250 YFM250R 2011 Yamaha Raptor 350 YFM350R 2011 Yamaha Raptor 700 YFM700R 2011 Yamaha YFZ450R 2011 Yamaha YFZ450X 2012 Yamaha Raptor 250 YFM250R 2012 Yamaha Raptor 350 YFM350R 2012 Yamaha Raptor 700 YFM700R 2012 Yamaha YFZ450 2012 Yamaha YFZ450R 2013 Yamaha Raptor 250 YFM250R 2013 Yamaha Raptor 350 YFM350R 2013 Yamaha Raptor 700 YFM700R 2013 Yamaha YFZ450 2013 Yamaha YFZ450R 2014 Yamaha Raptor 700 YFM700R 2014 Yamaha YFZ450R 2015 Yamaha Raptor 700 YFM700R 2015 Yamaha YFZ450R 2016 Yamaha YFZ450R 2016 Yamaha Raptor 700 YFM700R 2017 Yamaha YFZ450R 2017 Yamaha Raptor 700 YFM700R