I think you all need some loud cans I've got a 900 and a 748 and can only just hear the rattle from the clutch over the noise of the cans, blow me if I could tell if it had a delicate grinding noise
A quick fix when my 916 does this is to get out the compressor air line let her tick over and then pull in the clutch and blast air on the plates, amazing how much dust comes off.