I need advice on what to replace in my clutch on a 07 yz450. Here is my problem. I went to practice yesterday and my clutch was slipping all day. I didn't notice it at first (I thought it was wheel spin). After about 3.5 hrs of hard practice I notice all my play was out of the clutch lever. I adjusted it on the track then no play again. I had to loosen locknut to get play back in the clutch lever. I went back out on the track and the clutch didn't slip anymore, but I definitely backed off the throttle alittle. When I got home I could smell a burnt smell around the bike. I took the cover off today and I need some advice on what I found: 1. clutch plates - the plates (metal) are black! 2. pressure plate - some discoloration on teeth (where the plate, clutch basket, and plates connect) but no grooving. I do see small grooves where the springs sit in the pressure plate. 3. Inner Hub - discoloration and slight grooving(can't be felt but can be seen) 4. Clutch Basket - has grooves that can be felt with finger. From side looks wavy. Anybody else have this happen to them? I'm so pissed off. I usually maintain the 450 after every ride but my son started racing 50's and the last three rides I haven't had the time to look my bike over. I have been just cleaning air filter, changing oil, and lubing chain on the 450. Should I replace all? Can I get buy with just replacing the clutch basket and plates now? Then replace pressure plate and inner hub this winter. In other words can I just piece a new clutch together? Can I run clutch until total failure or is it an asap situation? Let me know what you guys think.