Ok I have a 2007 yz250f and every time I ride it for a while I'll come back and coolant will drip out of the overflow. Every other forum really hasn't helped me with this so i'm hoping this one will. The bike runs fine and isn't overheating it just keeps dripping coolant out of the overflow every time I ride it. I tried replacing the radiator cap and that didn't work. My oil does look a little milky, but someone told me that could be because I just put fresh clutch plates in it. I really want to know how to fix this so I can get out and ride. Thanks for the reply's.