The coolant in my bike keeps coming out of the overflow. It drips it's not a steady stream but I will lose a lot of coolant from it. My oil also looks milky I had the clutch cover off that's how I know. Im guessing it's the head gasket. If it is will someone please link me to the gasket so I know I'm buying the right one. The bike is a 2007 yz250f. Thanks for the replys.