So I finally got my 2000 yz426f up and running. However it appears to be overheating very quickly. Coolant is spewing from the drain line and smoke is steaming out of the lower right side of the motor. The bike runs and rides pretty darn well right now....just the overheating problem. I know these bikes aren't meant to idle for more than a minute or so, but the smoking and spewing of coolant seemed a little much. After talking with a neighbor he suggested that my head gasket is possibly blown. What other signs should I look for as far as the blown gasket, and are there any other diagnoses that you guys can think of?