I am thinking the wrist pin. I havent taken it apart yet. I already have another top end for it. The crank is still locked up and I suspect the cases are cracked too. I have a spare set of cases too.
It's a plated cylinder. If you look closely you can see it cracked the whole sleeve. A 2mm overbore cylinder came with the bike and I will use that one. This was one of the bikes that came in the package deal. 03 RM65, 03 KTM65, and an 08 YZ85 for $700.