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I have a 2004 GS500F. Engine runs fine in prime and doesn't die, when I leave it on ON, it dies everytime. I had the carbs completely went through and dipped. Jets cleaned etc. Took the petcock off my buddies 2009 GS500F, put mine on his. His never died and we road it for a while. I am not sure where to go next. It starts fine, runs fine but it will die if it is out of prime. Any suggestions?
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Check the vacuum hose from the petcock to the carb body. -
It looks good but could there be something I can't see? Should I just replace it to see?Comment
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Swap out the hose just to see it cannot hurt to try.Comment
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Okay I fixed it with the Vaccuum hoses. It now runs fine! But it sometimes will spike to 3k on the rpms and won't go down unless you put it into gear. I have the idle set to around 1400 when it's fully warm. Not sure why it's doing that. Sounds like air to fuel ratio is messed up or something?Comment
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do a search on air leaks.
the issue may be that your carbs have leaks around their intake manifold joints.
repairable with new o rings if these are fitted to your particular bike.Comment
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