Fuel Tank Cap Leaks

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Fuel Tank Cap Leaks

Postby stockie2 » Wed Feb 01, 2012 5:40 am

Don't know if this is already covered or other people get fuel weaping from the ceandess filler. But I noticed it on my roadster tank, with a new cap, so I got my o-ring kit out and put two o-rings in the filler neck, there is a little recess there, two o-rings makes them just slightly proud of the spout and sealed up my fuel venting. Anyone else done this?

Cheers Richard
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Re: Fuel Tank Cap Leaks

Postby nortriubuell » Wed Feb 01, 2012 5:47 am

Hello Richard,

I have had this problem before too. I swapped out gaskets until it quit. However, I like your idea of the O-rings better, but can't picture in my head where you placed them. Pictures would be great, and thanks for posting !
1973 Norton 750
1979 Triumph T140E (tore down now)
1971 Triumph 650 (being built)
1974 Norton 850 (being built, but very slow)
1999 Buell Cyclone
2006 Harley Electraglide
1973 Yamaha 650
1993 Kawasaki KZ1000P
Becoming a bike hoarder ???
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Re: Fuel Tank Cap Leaks

Postby zotz » Wed Feb 01, 2012 12:49 pm

Yes I wouldn't mind seeing a picture of that either. What I did, and it seems to work for me is make a fancy vented bathtub type plug. It keeps the gas from sloshing directly on the cap bottom. This won't work on all tanks however as mine is one of the ones that has an inner ledge where the filler neck is attached to the tank.
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Re: Fuel Tank Cap Leaks

Postby stockie2 » Thu Feb 02, 2012 2:40 am

Okay guys will organise some pictures, but in the meantime the I stacked the o-rings in the ledge part in the filler neck, kind of like the bath plug idea. Two rings make enough height to get a little crush on the cap seal.

Cheers Richard
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Re: Fuel Tank Cap Leaks

Postby xbacksideslider » Thu Feb 02, 2012 7:38 pm

Good idea, would have saved me the purchase and installation of a new seal but then I've got too many of that type of half fixes in my life already. Still, I'd a done if I'd a thought of it. :D
John Laing
1973 750 #220000
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