I recently bought a 2000 YZ426 that has been at best unloved... most fluids were low(or empty as for the rear master cylinder), the thing sounds like a plane during take-off and the clutch was refered to as an on-off switch by my best friend. With that said, all immediates have been tended too, now the clutch. I now about the work around and think it is great, I wasn't really sure it wasn't my only solution though. I figured I might as well take a look at it too see what condition it was in since the bike is like 9 years old. When I pulled it apart the friction plates didn't show any visible wear, but the metal drive plates looked severely glazed like some old flywheel from a teenager's beat-up mustang. I used a medium grit polishing wheel on an angle grinder and did both sides of all plates. I also cleaned the entire clutch pack with brake clean and reasembled. Once I got it closed up and oil in the case I tried it out. The clutch is smooth as can be. I think this was all due to lack of maintenance, dirty oil on the friction plates...no proof but thought this might be of interest.