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Fuel line question

Discussion in 'XJ Technical Chat' started by Niteryder, Jul 13, 2015.

  1. Niteryder

    Niteryder New Member

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    image.jpeg image.jpeg there two line coming off the petcock, one feeds fuel to the carb, where does the second one go? Is it just a vent?
     
    Last edited: Jul 13, 2015
    Niteryder, Jul 13, 2015
    #1
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The smaller line coming of of the petcock must be hooked to a vacuum source, which is generaly the vacuum port on the #3 carb intake boot.
     
    k-moe, Jul 13, 2015
    #2
  3. Niteryder

    Niteryder New Member

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    Thank you, that made all the difference, that explains why the bike wouldn't run right when set to on or reserve.
     
    Niteryder, Jul 13, 2015
    #3
  4. fiveofakind

    fiveofakind Well-Known Member

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    fiveofakind, Jul 13, 2015
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    Stumplifter likes this.
  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    It looks to me like it is on a short length of vacuum hose that is attached to the vacuum port.
     
    k-moe, Jul 13, 2015
    #5
  6. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Might be a one-way check valve (something aftermarket) that someone installed in a previous life.....
     
    chacal, Jul 13, 2015
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  7. Niteryder

    Niteryder New Member

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    Ok to leave it on or should I remove it?
     
    Niteryder, Jul 14, 2015
    #7
  8. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    If it actually is a 1-way check valve, no real harm in leaving it on (although the petcock already has a rudimentary version of the same thing internally); if it's not, then who knows? I think it would be best to ditch it, see if everything works okay, and if so, ride and be happy without it.
     
    chacal, Jul 14, 2015
    #8

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