The Wiseco Replacement Wristpin was designed specifically as a replacement wristpin for Wiseco pistons. The Wiseco wristpin will not work with OEM. Also Fits: Kawasaki KFX 700 2004-2009, Kawasaki PRAIRIE 700 4x4 2004-2006, KTM 450 SX 4-Stroke 2003-2006, KTM 450 XC-F 2006-2007, KTM 520 EXC 4 Stroke 2000-2002, KTM 520 MXC 4 Stroke 2000-2002, KTM 520 SX 4 Stroke 2000-2002, KTM 525 EXC 4-Stroke 2003-2007, KTM 525 MXC 4-Stroke 2003-2005, KTM 525 SX 4-Stroke 2003-2006, KTM 525 XC 2008-2010, Polaris OUTLAW 525 IRS 2007-2011, Polaris OUTLAW 525 S 2008-2010, Polaris RANGER RZR XP 4 900 2012-2014, Polaris RANGER RZR XP 900 2011-2014, Polaris RANGER RZR XP 900 LE 2012, Yamaha YFZ 450 2004-2009, Yamaha YFZ 450 2012-2013, Yamaha YFZ450R 2009-2019, Yamaha YFZ450X 2010-2011