I filled up my radiator before riding the other day and after riding for about 45 mi nutes i smelled antifreeze it was coming out of the overflow but it never overheated. I know some guys said theirs was doing that but they also said theirs was overheating when it did it. Whats the easiest way to check for a blown head gaskett so i can check it before the 2 hour ride back to the dealer.