Info: Yamaha YFZ450 / YFZ450R Clutch Kit from MacDaddy Racing. This clutch kit comes with 8 new clutch fibers (including 1 small fiber), 7 new steels, and 6 new springs. Our long-lasting fibers and high-quality aftermarket steels can be used in higher HP machines and our clutch springs are stiffer than stock Yamaha YFZ450 clutch kit springs. This means this kit is made to last. Whether you ride in the trails or at the drag strip, this clutch kit will surely suit your needs. Without a doubt, MacDaddy Racing has the highest quality parts for serious riders and builders who are looking to make more power. Compatibility: YFZ450: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 YFZ450R: 2009, 2010, 2011, 2012, 2013