Racing a HS race this past weekend on a track that was 15 miles long my bike would run fine until I had to ride up a CREEK. After I rode through the creek my bike started breaking up when I got on the gas. After about a couple of miles it would clear up. Next lap I came around to the same creek and tried to go slower through the creek and same thing started happening. After about 3 miles it started running fine again. This happened every time I went throught the creek. The rest of the track was completely dry. I have never had this happen to my bike before. I have a 04 YZF450, what could be some of the problem areas that I should look for??