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Thread: Aircraft Style Filler Caps

  1. #1
    Should Get Out More Julian_Boolean's Avatar
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    Default Aircraft Style Filler Caps


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    I want to get an aircraft style filler cap fitted to one of my Z1000J fuel tanks, the tank needs welding so it doesn't have to be a bolt on version, when I looked a while ago I found a nice one that used a hollow bolt as the breather but I can't find that one now that I've got the money to get the tank modified.

    Any suggestions welcome, preferably with links.

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    Should Get Out More a_morti's Avatar
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    Default Re: Aircraft Style Filler Caps

    What about cutting the top out if a dinged tank off another bike with a cap you want, and welding it to the tank you have? You'll have to link up the internal breather pipes but this will give you a factory cap and breather system. Better than a hollow bolt.

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    Should Get Out More Tomcat's Avatar
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    Default Re: Aircraft Style Filler Caps

    Demon Tweeks have a fair selection. Whether they are vented or not, I don't know. Common practice on race bikes with unvented caps is to weld a short section of breather pipe on the highest point of the tank with a rubber tube and one-way valve attached.

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    Should Get Out More Julian_Boolean's Avatar
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    Default Re: Aircraft Style Filler Caps

    Quote Originally Posted by Tomcat View Post
    Demon Tweeks have a fair selection. Whether they are vented or not, I don't know. Common practice on race bikes with unvented caps is to weld a short section of breather pipe on the highest point of the tank with a rubber tube and one-way valve attached.
    I've found a company called Newton who do a good range, they also do breather valves, they're only in Essex so I'm going to give them a call and see if I can pop down to have a look at their products.

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    Should Get Out More Tomcat's Avatar
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    Default Re: Aircraft Style Filler Caps

    Cool, I'll be interested to hear how it goes.

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    Should Get Out More demographic's Avatar
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    Default Re: Aircraft Style Filler Caps

    Got a mate who did one for my old XJ550.
    We bought a YPVS tank off a breaker, cut a section out of the top and the bottom (the small section round where the overflow breather pipe came out.
    Used an edge setter to create a slightly dropped area in the XJ tank so the Powervalve tank top section would fit in.
    Drilled a hole in the tank bottom for the breather pipe.
    Welded it in and put a bit of bodyfiller round to smooth the lines out.
    Looked good but its worth mentioning that because of the frame spine shape I couldnt get the petrol nozzle in as far as I can with a tank thats been designed for it but it wasn't a real issue and it filled just fine.

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