OK, the clutch basket blew up in this bike and ripped itself apart. I'm doing this work for a buddy of mine. Everything on the clutch itself looks ok, except the basket is trashed. What would be a good and relatively inexpensive way to get this replaced. The dealer wants 150 bucks for it. For a long time when this bike used to run the clutch was really on/off, it never wanted to slip any so it was hard to get going without stalling. I've read of others having this problem with this particular bike, what is the cause and fix for this? Do I need to put a different clutch in it too? Also, What is the deal with the 450 exhaust cam? Why don't you need to use the decompression with it? Are there any additional parts needed other than the exhaust cam out of like 03 YZ450? Lifters or anything? How much does it cost? Is there a big bore kit available for this motor, like a 444 or something? How much does it cost and where is it available from? Is it as simple as having it bored and re coated and then putting it back together with a new piston, or are there other changes? Any other mods worth doing or considering while it's apart?