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My bike dies when it gets below half a tank

Discussion in 'XJ Technical Chat' started by JamesG, Jan 17, 2025 at 12:36 PM.

  1. JamesG

    JamesG New Member

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    When i got the bike i derusted and then sealed the tank and had to buy a new petcock well I cheated out and the 1st one i bought was garbage bought a new one that was decent quality and it works good until I get about 3 /10 of a tank if I let it sit for a while I can get it to hit on once or twice but no more than that
     
    JamesG, Jan 17, 2025 at 12:36 PM
    #1
  2. Franz

    Franz Well-Known Member

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    Blocked tank vent cap causing vacuum starving the carburettors of fuel. Try starting it with the bike on the centre stand and the fuel cap open.
     
    Franz, Jan 17, 2025 at 4:19 PM
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  3. JamesG

    JamesG New Member

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    This got it to hit a few more times but it still didn't start
     
    JamesG, Jan 17, 2025 at 8:25 PM
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  4. Franz

    Franz Well-Known Member

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    If it has been unused for a while then you will need to rebuild the carburettors. Is it a vacuum tap you have? If so is the vacuum line running from the tap to the inlet stub attached and in good condition?
     
    Franz, Jan 17, 2025 at 8:45 PM
    #4

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