I got the tranny off of Johnny's old "Bug-eyed motobrick" (a.k.a. the motoheap) - a 94 K1100RS that died in Iderhoe:
(http://i1221.photobucket.com/albums/dd470/Motobrick/bug_death/bug_death_sawhorses.jpg)
Here's what a "normal" worn clutch plate looks like:
(http://i1221.photobucket.com/albums/dd470/Motobrick/bug_death/bug_death_normal_clutch_plate.jpg)
Here's what the back of the bug's engine looked like after the clutch plate 'sploded:
(http://i1221.photobucket.com/albums/dd470/Motobrick/bug_death/bug_death_clutch_explody.jpg)
Those are little piles of the clutch plate friction material. :o