I just recently rebulit the crank and put a fresh top-end on my son's '01 kx 65. Shortly after starting it up, I noticed a small dribble of coolant leaking from between the cylinder and crankcase right below the exhaust. Pulled it back apart to inspect and can't figure out how coolant could be leaking from that location. From looking at it, it dosen't appear coolant should be coming that low, entering on the side of the cylinder exiting on top. Is it possible I have an internal leak? The bike never smoked and plug looked great when I took it apart, a nice tan/chocolate brown. Any help would be greatly appreciated, my son is driving me crazy to ride.