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Thread: Gas woes

  1. #1
    Registered User
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    Jul 2003
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    Lawrence, KS
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    Gas woes

    Bike: 1974 R75/6

    The right carb floater case leaks at unusual times; it does not happen everyday, nor even every week. However, over the weekend it leaked (about 2 drops a minute) for a day. Looking at the right fuel petcock (which is always off becasue I use the left side) it was off, but appeared to be sweating. Well, it was leaking. I turned it "off" in the other direction and this appeared to stop the leak from there.

    I guess my questions are:

    Have you experienced the leak?

    Should I try to replace the petcock (if so, how much $$ and trouble is that)?

    So, I am not sure if the leak is a result of the petcock along or if there are other factors involved, what should I look for?

    Thanks.

  2. #2
    Focused kbasa's Avatar
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    Mar 2003
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    Marin By God County, California
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    11,639
    If I'm not mistaken, you can easily rebuild the petcocks.
    Dave Swider
    Marin County, CA

    Some bikes. Some with motors, some without.

  3. #3
    Registered User
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    Lawrence, KS
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    Where could I find some guidance on the topic? Clymer? Maunal?

    The last thing I want it to muck up the system because I feel frisky and decide to unscrew the petcock to inspect it.

    Thanks.

  4. #4
    Registered User
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    Apr 2003
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    It's been a few years since I had to replace one but as I recall simply buying a new petcock was darn cheap....cheap enough that I bought a new one instead of the rebuild kit.

  5. #5
    Registered User
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    Lawrence, KS
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    the verdict

    A brief message to bring the ordeal to an end (hopefully).

    I did not purchase a new petcock yet (although it will probably happen in the next few weeks just for good measure).

    I drained the tank.
    I did disconnected the petcock from the tank and the gas lines.

    I found that the gaskets were pretty worn and brown.
    I bought gasket material (1/8 inch thick) from NAPA and will be cutting one to fit in the petcock.

    I will post if it is not successful.

  6. #6
    Blocking the slow lane
    Join Date
    Mar 2003
    Location
    Elburn, IL
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    1,843
    I just put two new petcocks on our recently-acquired R90S....they were like $23 apiece including tank filters. A bargain.
    Jon Diaz
    BMW K75/K12GT
    BMWMOA Ambassador

  7. #7
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    Apr 2003
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    7
    I found an old replaced petcock (yes, I am a hoarder of semi-useless junk) and remembered why it ended up in the junk parts bin. The choke cables (1975 R75/6) had worn through the backside of the main body, a piece of cloth-covered fuel line on the cable has saved the new one from any wear.

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