Clutch Disc identification?

[mattcfish]

Sachs 21212325862. Which bikes does it fit? I found the part number on Max BMW, but know information on fitment.
I've got a nice one in my spare parts pile that I'd like to sell. It would make it easier if I knew which bikes it works with.
I've done quite a bit of checking around with no luck. If this part # was superceded with another, what's the new number?
Thanks