you must keep your ears pealed for ticking sounds coming out of the clutch side cover.  A few have worn out at 10k miles, and most don't go past 20k.  I bought my bike at 16k and it made it untill 22k.  If I had openned it up before the damage was done, I could have saved myself the expense of replacing all of the parts.  When finally my hair stood up on end (very uncomfortable in a ff helmet) I knew it was time.  Shown below is my adjuster at 22k.  And I just heard some odd noises, no loss in performance, no hiccups, just happy times.  And it was out 22mm, not much longer and I would need some major repairs.