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gas cap help please?

Discussion in 'XJ Technical Chat' started by mountaintrout, Oct 4, 2013.

  1. mountaintrout

    mountaintrout New Member

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    does the xj require a vacuum cap or vented cap for an aftermarket tank? if so can you explain the function of the "vacuum"?
     
    mountaintrout, Oct 4, 2013
    #1
  2. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    you need a vented cap. The vent allows air to suck into the tank as the fuel leaves the tank. Otherwise, you'd end up with a vacuum inside the tank that will eventually get strong enough to overcome the diaphragm in the fuel valve. That will cause the fuel to stop flowing..........of course, you know that will cause the bike to stop running..

    Dave
     
    hogfiddles, Oct 4, 2013
    #2
  3. mountaintrout

    mountaintrout New Member

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    thank you very much for the help. great folks like you are hard to find
     
    mountaintrout, Oct 7, 2013
    #3
  4. Kilted_to_the_Max(im)

    Kilted_to_the_Max(im) Member

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    You'll never find anyone like Hogfiddles. That's a government mandate.
     
    Kilted_to_the_Max(im), Oct 7, 2013
    #4

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