I have installed Rekluse 's auto clutch on my 01 426. Easy install - great product! I'm not using the Perch adjuster. I'm using the light spring and my "install gap" is correct. I love this thing in the tight woods!! It seams to work perfectly. However, I was on the MX track yesterday and I didn't feel that the clutch ever fully engaged (even on longer straits). It would still be slipping on the face of jumps, so I didn't feel like I had the power to the wheel that I needed. Perhaps my friction (fiber)plates need to be replaced. Any thoughts / ideas? Thanks!