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Thread: R90/6 '76 - Leaking petcock

  1. #1
    Registered User plehman's Avatar
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    R90/6 '76 - Leaking petcock

    Working on the headset and noticed a little gas puddle. What? did I leave a petcock open? Is the cork leaking or the float bowl not seated properly? I pulled the bowl down and gas, gas, gas. Just filled it up!

    Question. Could the gasket be bad? Number 5 on this page. What else fails on petcocks? They were updated at some point in the last 10 yrs.

    http://www.maxbmwmotorcycles.com/fic...9&rnd=04302013

  2. #2
    Registered User plehman's Avatar
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    Actually you have to see Diagram 16 0225

    http://www.maxbmwmotorcycles.com/fic...9&rnd=04302013

  3. #3
    Administrator 20774's Avatar
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    It's not clear where the gas is leaking from. Is it coming out of the bowl, is the hose leaking, is it leaking around the petcock, above the petcock? Need to know that first. Item #5 is something that rarely needs replacing unless it's been cracked...in which case the hose won't seal on it.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
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  4. #4
    Registered User plehman's Avatar
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    Right. Saw the leak. Removed to bowl to make a better seal and the gas didn't stop. Usually when I take off the bowl and the petcock is closed no more gas comes out. Maybe it was just what was in the line and inline filter. Will try again tonight.

  5. #5
    Registered User lmo1131's Avatar
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    Easier to see when the page is posted.

    Gasket (#7) can become hard with age and leak.

    Keep in mind, with the cross-over fuel line through the air filter box in place, it could be the "other" petcock leaking.

    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  6. #6
    Registered User plehman's Avatar
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    DIY can equal dumb, idiotic, yanker
    Thought I checked and often don't even open the right petcock. Sure enough it was wide open.
    Basics man! Why do I always jump to the catastrophic?

    Thanks for your patience.

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