I recently picked up a 1986 200x. The clutch was slipping when I got it, and when I changed the oil there was a dull grey film on top. I thought it was from clutch particles since it was slipping. I have since changed the clutch recently. I changed the oil and the dull grey film is still there on top. I don't think its metal shavings as its not sparkly like metal shavings are. Is this something I need to be worried about. It runs good and the new clutch does not slip.