Manufactured by Factory Spec Made from hardened steel, outlasts aluminum sprockets 45 tooth, rear steel Sprocket 520 pitch This sprocket may not be the stock size for all the models it fits. Buyer must check their model for proper clearance before ordering when changing stock gearing. A different length chain may also be needed when changing from stock gearing. Made in Taiwan Fits the following models 1986 1987 Kawasaki Ninja 250 EX250E ***3 Teeth larger than stock*** 1988 2007 Kawasaki Ninja 250R EX250F ***Stock tooth size*** 2008 2012 Kawasaki Ninja 250R EX250J ***Stock tooth size*** 2013 2015 Kawasaki Ninja 300 EX300A ***3 Teeth larger than stock*** 2014 2015 Kawasaki Ninja 300 SE EX300ASE ***3 Teeth larger than stock*** 2016 Kawasaki Ninja 300 EX300 ***3 Teeth larger than stock*** 2016 Kawasaki Ninja 300 ABS EX300ABS ***3 Teeth larger than stock*** 1987 1993 Kawasaki Ninja 500 EX500A ***3 Teeth larger than stock*** 1994 1996 Kawasaki Ninja 500 EX500D ***4 Teeth larger than stock*** 1997 2009 Kawasaki Ninja 500R EX500D ***4 Teeth larger than stock*** 1990 1993 Kawasaki Zephyr 550 ZR550B ***4 Teeth larger than stock*** 2011 2015 Suzuki GSXR600 ***For 520 Chain Conversion, 2 Teeth larger than stock*** 2011 2015 Suzuki GSXR750 ***For 520 Chain Conversion, 2 Teeth larger than stock*** 2009 Suzuki GSXR1000 ***For 520 Chain Conversion, 3 Teeth larger than stock*** 2011 2016 Suzuki GSXR1000 ***For 520 Chain Conversion, 3 Teeth larger than stock*** 2004 2008 Yamaha FZ6 ***For 520 Chain Conversion, 1 Tooth smaller than stock*** 1998 2003 Yamaha YZF R1 ***For 520 Chain Conversion, 2 Teeth larger than stock*** 2004 2008 Yamaha YZF R1 ***For 520 Chain Conversion, Stock tooth size*** 2009 2014 Yamaha YZF R1 ***For 520 Chain Conversion, 2 Teeth smaller than stock*** 2015 Yamaha YZF R3 ***For 520 Chain Conversion, 2 Teeth larger than stock*** 2003 2005 Yamaha YZF R6 ****For 520 Chain Conversion, 3 Teeth smaller than stock*** 2006 2016 Yamaha YZF R6 ***For 520 Chain Conversion, Stock tooth size*** 2006 2009 Yamaha YZF R6S ***For 520 Chain Conversion, 3 Teeth smaller than stock*** 1999 Yamaha YZF R7 ***For 520 Chain Conversion, 2 Teeth larger than stock***