My sons' freind just bought a used 2002 YZF426. I didn't see it, but after a short ride a greyish liquid came out of the cam cover breather hose. The liquid may have been oil w/ water or coolant in it, but I'm not sure. Drained some oil and looked under the cam cover. Both looked ok. Coolant was filled up to the cap. Not good. Possibly over filled with oil. Bike is actually in good shape and seems to have have fewer hours than my son's 01. Could there be a possible problem with gaskets or something? Any suggestions? Are we over reacting.