I just got a 05 yfz 450 and the whole clutch set up had to be replaced. I decided to get this wiseco basket and fiber steel spring kit along with a oem inner hub. I went with the wiseco because its $20 cheaper than the hinson and come with the lifetime warranty. I can't comment on any performance gains because the previous clutch was a mess but it is pretty simple to install. Watch the video ththat motosport has up for the hinson basket and it will show you what you have to do. Install time took me about 2 hours but it was my first time doing this. Great price here at motosport. Thanks guys. REMEMBER. TORQUE ALL BOLTS TO SPEC!