I went racing over the weekend and had some problem with my bike. My bike is jetted and has a rekluse clutch on it but other than that it is stock. The bike kept dying on me and at first I thought that it could be that the clutch was out of adjustment. I adjusted the rekluse but still kept dying. I took the gas cap off to make sure that there was fuel and when I took the cap off you could hear a lot of pressure coming out of the tank. It sounded like when you shake a bottle of coke and open the cap. I checked the cap and it was venting but I do not know why there was so much pressure building up. By the way this is the third race on the rekluse clutch and I have had no problems in the previous races so I do not know if that is the problem. I changed the radiator coolant to water wetter, it is supposed to make the bike run cooler. Any advise to what could be causing the bike to die?