sounds like early failure if it is adjusted correctly. Possibly from slipping it too much starting out, another possibility is glazed from same thing. If thats the case open it up and lightly scuff them with a surface prep pad or sand paper. Be sure to clean them very well if you use either especially the sandpaper. Possibly had a disc or 2 delaminate too.

I really never had an issue with the old bikes except notches in the clutch basket or tabs worn on the discs that engage with the basket. Most other failures I have seen were from guys that shouldn't be wrenching on them. REMEMBER: You have to be smarter than your tools!

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!