[skidlids]

Didn't think there was much in the weight of the rears, just that the later ones are a better quality alloy that doesn't distort so easily and the bearings don't drop out of as easily.

Also there are a big difference in the weight of some front brake discs, early Ducati ones being the worse that I know of

As for the fronts they can be found in
748
916
996
ST2
ST4 (i think)
M600
M620
M695
M696 ( I suspect are the same even though the rears aren't)
M750ie
M800
M900ie
M1000
MTS620
750SSie
800SS
900SSie