I have a 686 raptor12:1 comp with ported head and all the goodies but my problem is that the antifreeze is leaking out of the overflow resivor in the back when I ride it hard. dose any one know what it is or had the problem and how to fix it. I thought it was a headgasket

 

I kinda had the same thing happend when i had a Raptor, but all i did was tighten everything up back there and it was fixed