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bluerider31

06 450 problem

6 posts in this topic

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?

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Was it pressure being released or a vacuum inside the tank? Most likely it was a vacuum inside the tank since while riding your removing fuel from the tank. Like Sureblue said, pull the hose off your gas cap and make sure the arrow on the inline vent is pointing the correct way. It sounds like it's not allowing air into the tank. Does the bike run good for a little while once you open the tank, if so it's another sign of the vent being installed backwards or plugged.

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It is a vent problem for sure. make sure the check valve isn't in backwards.

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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?

My 05 WR450 had the same problem. When riding in 80+ degrees in thick, slow crawling rocks and sand. It would heat the fuel up in the gas tank and build so much pressure that it would malfunction the check valve and the bike would die. The only cure was to loosen the cap every few minutes.

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Damn, I hadn't heard of that. I would just remove the vent valve in the hose. I know my wife's CRF doesn't use one and it's fine. I hadn't thought of that.

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