I just got my bike back from the shop who replaced a bent valve. The bike had just gotten out about 2 weeks before that after just having the Crank, rod, piston and cam chain replaced.. So I ran it for about 20 min last night and runs great but when I was done I checked the oil and it came out VERY thin and dripy (technical term there) and was somewhat discolored. It was more clear than amber and actually kind of light grey.. Its got fresh 20-40 in it but the oil just did not look right. Could coolant be getting into the oil some how? If so HOW? and what would be a way to test for this?? Is it just the yamalube breaking down?