Changed my Transmission oil for the first time after the dealer first service, 4000 miles on the bike now. The drained fluid had what looked like diluted gold metalflake paint on the bottom of the pan with lots of brass fines, almost too small to see without a magnifying glass. What in the transmission is made of Brass? (I'm assuming that is what the gold metal is). There was barely anything on the drain plug magnet, and no chips or shavings at all, just fine filings. Should I be concerned? What could be causing this?