1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

1985 Maxim X Can't get fuel from the tank valve.

Discussion in 'XJ Technical Chat' started by HFB1, Sep 9, 2015.

  1. HFB1

    HFB1 New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Shreveport LA 71107
    As stated 1985 Maxim X sitting for the last 14 years. 11523 miles. I don't think the vacuum flow control on the petcock is working. How can I test the vacuum to see if that is the problem. I took it all apart, the fuel valve assembly and think it is OK. If I suck on the vacuum port to the valve something happens inside. The engine has run a little during my testing but only a few seconds. I think with good fuel flow the engine will run. A folow up shows the fuel control set to Reserve does not need the vacuum? Can someone verify this.

    OK the Pri output will flow air for a while after I suck hard on the vacuum port. Where is the best place to buy a Anemometer for balancing the Carbs? The fuel tank low sensor leaks so that has to be fixed before more testing can be done.
     
    Last edited: Sep 9, 2015
    HFB1, Sep 9, 2015
    #1
  2. quebecois59

    quebecois59 Well-Known Member

    Messages:
    2,285
    Likes Received:
    114
    Trophy Points:
    63
    Location:
    Waterloo, Quebec, Canada
    If you put the fuel valve on PRI you don't need any vacuum, it will work with gravity.
     
    quebecois59, Sep 9, 2015
    #2
  3. HFB1

    HFB1 New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Shreveport LA 71107
    Thank you quebecois59 I had found that out. I am still leaking around the tank level sensor and I think It will run tomorrow.
    Then on to the front brakes.
     
    HFB1, Sep 9, 2015
    #3
  4. k-moe

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

    Messages:
    19,690
    Likes Received:
    6,777
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Rebuild the petcock.

    Fix the tank leak. Hot engines and leaking fuel will get you a trip to the hospital.

    Check valve clearances before you run it.
     
    k-moe, Sep 9, 2015
    #4
  5. fiveofakind

    fiveofakind Well-Known Member

    Messages:
    1,362
    Likes Received:
    180
    Trophy Points:
    63
    Location:
    San Diego, CA
    I agree with k-moe...if that bike has been sitting for 14 yrs....that petcock definitely needs rebuilding & the tank gasket around the gas level sending unit needs replaced also.......

    These are a must if you don't want to be a fireball zooming down the highway......

    Advice..."Wise men don't need it, & fools won't heed it"
     
    fiveofakind, Sep 9, 2015
    #5
  6. Toomanybikes

    Toomanybikes Well-Known Member

    Messages:
    2,836
    Likes Received:
    815
    Trophy Points:
    113
    Location:
    Tsawwassen bc
    Fuel tank vent clogged? Does gas flow with cap open?
     
    Toomanybikes, Sep 10, 2015
    #6
  7. HFB1

    HFB1 New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Shreveport LA 71107
    The problem that caused me to stop riding was fuel tank vent, Which is through the lid key hole, got clogged and the bike would die sometimes at about 60mph. It took a while to find it and trust was gone in the machine.
     
    HFB1, Sep 10, 2015
    #7

Share This Page