I bought an 06 yz250f last fall, that was in boxes. The crank was locked up and the top end was off of it. I finally got around to splitting the cases today to find these pieces in the oil sump. I'm not sure what these are from, I see no damage to the cases and all of the top end looks good. The best I've come up with is pieces of clutch basket or pressure plate from a previous clutch blow up. The clutch that was in it shows no damage. Anybody able to identify these bits?