Specs: Timing Cam Chain Meets or Exceeds OEM Specs for Fit and Performance Compatible With/Replacement For: Kawasaki KX 450 F 2009-2018, Yamaha WR 450 F 2016-2018, YZ 450 F 2010-2019, YZ 450 FX 2016-2018 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. But in a rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we will take every step to assist you, contact us for a replacement. 100% New aftermarket Timing Cam Chain built to meet OEM specifications