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Fuel enrichment screw

Discussion in 'XJ Technical Chat' started by Evan Hawtrey, Sep 1, 2016.

  1. Evan Hawtrey

    Evan Hawtrey Member

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    I believe that's the name...u adjust it for color tune... well on carb #1 the top of the threads r gone in carb...I can only turn it in so far so it runs lean...how can I fix this? Helicoil?tap it? Find a new carb?
     
    Evan Hawtrey, Sep 1, 2016
    #1
  2. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    Are you saying the head is stripped, or is part of the screw broken off in there?
     
    TheCrazyGnat, Sep 1, 2016
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  3. Evan Hawtrey

    Evan Hawtrey Member

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    Head is stripped, sorry for bad clarification
     
    Evan Hawtrey, Sep 1, 2016
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  4. Evan Hawtrey

    Evan Hawtrey Member

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    Well just first 2 threads appears
     
    Evan Hawtrey, Sep 1, 2016
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  5. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    Do you have a set of ez outs? That might be easiest, and they are brass, so there is probably a smaller chance that the bit will break off in there.
     
    TheCrazyGnat, Sep 1, 2016
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  6. Evan Hawtrey

    Evan Hawtrey Member

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    Well screw is out..never had an issue with it...just some of the threads r gone in the carb body itself...so if I wanna turn it in I can only turn in so far...can't really adjust the fuel amount currently...
     
    Evan Hawtrey, Sep 1, 2016
    #6
  7. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    Hmm, we'll have to see what others have to say, I don't have any experience with Helicoil or tapping. I don't know that there are different sizes of the adjustment screw available.
     
    TheCrazyGnat, Sep 1, 2016
    #7
  8. Stumplifter

    Stumplifter Well-Known Member

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    Are you certain the screw isn't bottoming out? Is the tip bent?
     
    Stumplifter, Sep 1, 2016
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  9. Evan Hawtrey

    Evan Hawtrey Member

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    100% certain..took it out..the threads r jacked up
     
    Evan Hawtrey, Sep 1, 2016
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  10. k-moe

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

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    Start a conversation with Chacal. He carries a thread tap for the idle mixture screw holes. You might be lucky enough to get the threads back into shape by running a tap through (a reformer would be better, but I have not found one in that size). If that dosen't work then you'll need a new carb body. There isn't enough room to use an insert, and having the hole welded shut and re-machined will be eeeeeeeeeexpenssssssve.
     
    k-moe, Sep 1, 2016
    #10
  11. MiGhost

    MiGhost Well-Known Member

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    These bikes were originally equipped with anti tamper plugs on the mixture screws so there will be a small space at the top without threads. If you can lightly seat the screw and get 4-5 complete turns before the screw comes loose you should be in good shape.

    Make absolute certain that there is not an o-ring or washer still stuck down in the hole. This will cause the spring to bottom out long before your in range for proper mixture adjustment.

    From what I gather. You are saying that the threads in the carb body are stripped out.
    If that is the case. It is easier and cheaper just to replace the carb body.

    ~Ghost
     
    MiGhost, Sep 2, 2016
    #11

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