Billet aluminum chain adjuster blocks hold the wheel precisely in place while tightening the chain and stay in position even when the axle is removed Designed to work with only one 12mm (13mm on the KTM) wrench is needed to make chain adjustments Each andonized 6061 aluminum block has laser etched aligning marks and has anti-seixe pre-applied to threads Kawasaki chain adjuster blocks include a 22 mm metal locknut to replace the stock cotter pin and castle nut This item fits the following applications: 2003-2016 Yamaha WR450F 2003-2008 Yamaha YZ450F 2002-2017 Yamaha YZ250 2002-2017 Yamaha YZ125 2002-2016 Yamaha WR250F 2002-2008 Yamaha YZ250F 2002 Yamaha YZ426F
