Clutch specs from the free manual download http://www.mediafire.com/?34muedntyxz
are on page 4-55
Flyin' Al a tw lover has said......
If you need a new clutch, you need to get ALL the parts. If you do not replace all the parts the new clutch will not work right, and you can damage the clutch basket. You need to replace the clutch plates, the friction plates, and the springs. Also, soak the new clutch plates in motor oil (which you use on the bike) for at least a day before you put on the new clutch.
Use lock-tite on the clutch spring bolts and do not over-tighten. Get a new clutch cover gasket, do not reuse the old one. Lastly, change your oil when you get a new clutch. My clutch was about 80% gone at 13500 miles.
I've only got 2k on my bike so far so I don't have any firsthand info for ya. I wish Al would have noted which strength loc-tite he was using.
Edit 2013: my clutch fell out of adjustment (just shy of slipping) to the point where I needed to take the engine case off and adjust the clutch basket screw. But I thought screw it and did discs as well.. I'm at 6000 miles