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Fuel coming from the vent side of petcock

Discussion in 'XJ Technical Chat' started by Fishmishin, Jul 24, 2017.

  1. Fishmishin

    Fishmishin New Member

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    working on a 81 xj550 that I picked up a month or so ago. Last night I had the bike firing up off of spray through the carbs so I decided to put the tank on and add gas. As soon as I put the gas in the tank it started to run out the vent of the petcock, regardless what position I turn the petcock too. Any suggestions, replace petcock ?
     
    Fishmishin, Jul 24, 2017
    #1
  2. Stumplifter

    Stumplifter Well-Known Member

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    Click the icon in the upper right hand corner.
    Start a conversation with Chacal of XJ4Ever fame.
    Order a Petcock Rebuild kit.
    You will experience joy.
     
    Stumplifter, Jul 24, 2017
    #2
  3. fiveofakind

    fiveofakind Well-Known Member

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    ^^^ agree with above.....I just rebuilt mine.......spitting fuel out the seep hole in the plastic spacer......diaphram was bad......
     
    fiveofakind, Jul 24, 2017
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    your diaphram is leaking , it is not a vent it is a vacuum port.
     
    XJ550H, Jul 24, 2017
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  5. Fishmishin

    Fishmishin New Member

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    Thanks for the speedy replies. This is my first bike, so I am sure there will be other questions along the way. I will get a rebuild kit ordered later this week. Anxious to hear it run so can start to move forward with the fork rebuilds, brake line and pad replacement, checking the valve shims, and I am going to pull it all down and give it a fresh coat of paint.
     
    Fishmishin, Jul 25, 2017
    #5
    Stumplifter likes this.

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