I was wondering if anybody had an idea what would cause a head gasket leak on a 05 crf 450 with about 15 hours on it. The bike has never been torn apart. After coming off the track i heard a little whine in the motor i then saw coolant coming out of the front between the cylinder and the head. I dont think this is a common occurance is was wondering if anyone had any idea. There is no water in either engine or tranny oil.