I had a base gasket leak first off. Pulled the cyclinder to replace and i noticed that the counterweights had some discoloration where the crank pin goes. I do not recall seeing this before. There is no up and down play in the crank and very little side to side play. I was really wondering if this was normal or not. The bike is a 2002 yz250 w/an FMF pipe and boyeson pro series reeds, other than that it is stock. I am also noticing some carbon in the intake not a lot just a very light "dusting".
Thanks in advance