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FJR Motorcycle Forums
Technical & Mechanical Problems
Need help in figuring out a fuel problem.
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<blockquote data-quote="SkooterG" data-source="post: 1470903" data-attributes="member: 118"><p>Well, my guess is the O-ring in the return line in the fuel pump. It's a known issue for the older Gen I FJRs. It gets old and brittle/deformed/cracked and fuel starts leaking. What is odd is no smell of fuel. Perhaps just because it is leaking so slow. It's a stupid design by Yamaha imho.</p><p></p><p>There is no way that temperature is making that big a difference. Nor do I think it is evaporation. That would be a LOT of evaporation. I think you have the fuel pump leak. It is just so slow that it is not noticed unless over a long period of time.</p><p></p><p>This thread on FJROwners might be helpful: <a href="https://www.fjrowners.com/threads/fuel-leak.153544/#replies" target="_blank">https://www.fjrowners.com/threads/fuel-leak.153544/#replies</a></p></blockquote><p></p>
[QUOTE="SkooterG, post: 1470903, member: 118"] Well, my guess is the O-ring in the return line in the fuel pump. It's a known issue for the older Gen I FJRs. It gets old and brittle/deformed/cracked and fuel starts leaking. What is odd is no smell of fuel. Perhaps just because it is leaking so slow. It's a stupid design by Yamaha imho. There is no way that temperature is making that big a difference. Nor do I think it is evaporation. That would be a LOT of evaporation. I think you have the fuel pump leak. It is just so slow that it is not noticed unless over a long period of time. This thread on FJROwners might be helpful: [URL]https://www.fjrowners.com/threads/fuel-leak.153544/#replies[/URL] [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Need help in figuring out a fuel problem.
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