JC
I was reading about your slipping clutch on a high millage bike.
When the Aluminum clutch pack gets hot it swells , but the steel/fiber plates don't. So ...
I experienced the same thing. (a little over 50,000 miles.)
Upon investigation I found the clutch pack with no disk in it can only collapse so much. Well , I measured the thickness of each disk in the pack added them together and found the empty clutch pack could not collapse enough.
Apparently , the steel disk are all in tolerance and the fiber disk are in tolerance .
So ... " What the **** " .
The deal is : Those fiber plates and steel plates don't wear ,
but ,
the back of the clutch pack "does the same job as the steel plates". It's ALUMINUM and it does wear , the solution is to add an extra steel disk into the clutch pack. $8.50 +- 99% chance the dealer will have to order it.
Steel plates = about .060"
Fiber plates = about .130"
1 steel plate is enough , you may need to increase the length of the push rod in the middle of the clutch pack for the thicker disk pack ... but maybe not ? It's only .060" we are adding ! Mine has enough adjustment to work like a new one !