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What is this needle type object found next to choke plunger?

Discussion in 'XJ Technical Chat' started by dizzycow, Dec 24, 2014.

  1. dizzycow

    dizzycow Member

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    Hate to make a new thread but i looked around with the search tool and didn't find anything helpful
    taking apart my carbs currently (first time every disassembling a carb). I checked my service manual's diagram of the carbs but i didn't find any similar looking objects in the diagram[​IMG]
     
    dizzycow, Dec 24, 2014
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  2. FtUp

    FtUp Well-Known Member

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    it's called the pilot mixture screw. or more commonly known as the idle mixture screw. there is also a spring, washer and o-ring in there.

    CN
     
    FtUp, Dec 24, 2014
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  3. dizzycow

    dizzycow Member

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    well shit i think i know why my bike wasn't running right. the only thing that came out of that hole was the needle itself. DAMN POs WHO DON'T DO THOROUGH WORK!!!!!:mad:

    thanks for the quick response cyclenoob.
     
    dizzycow, Dec 24, 2014
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  4. FtUp

    FtUp Well-Known Member

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    in the pic above, it looks like the spring and everything else is still in the hole. take a small wire and bend a hook on the end to fish them out.

    I hope you payed attention to what holes the air jets under the diaphragm came out of. the service manuals have them labeled backwards. it is all documented here on the forum somewhere. that being said, if they have been apart before, it is entirely possible they were reinstalled wrong already.

    CN
     
    FtUp, Dec 24, 2014
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  5. Stumplifter

    Stumplifter Well-Known Member

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    It is often recommended that before you remove the idle mixture screw, to turn that screw in (counting the number of turns) until it bottoms out.
    This will then give you a rough starting point after the rebuild.

    Although from what I have read here and personally experienced on a XJ650 Maxim, is that starting off with 2.5 turns out is usually sufficient for vacuum syncing and then Colortune from there.

    And yes, like cyclenoob said - pay attention to details!
    Take notes and digital pics.
    And go to Church. . . .

    http://xjbikes.com/forums/index.php?threads/in-the-church-of-clean.14692/
     
    Stumplifter, Dec 25, 2014
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  6. dizzycow

    dizzycow Member

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    turns out after reading your reply that the spring and washer were in there, i can't seem to get the o ring out, I'm truly lacking tools, dry expensive. yeah i took pictures of everything and notes. i've read through most of the stickied threads before i took the carbs off.

    I'm really bummed that the diagram doesn't show like half the jets. i feel like they should have done 2 or 3 pictures on the carbs from different angles.
     
    dizzycow, Dec 25, 2014
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  7. Bushy

    Bushy Active Member

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    To get the O ring out.. straighten a paper clip and make an L at one end probably only about 2mm will do and go fishing with it.
     
    Bushy, Dec 25, 2014
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  8. rocs82650

    rocs82650 Well-Known Member

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    If you have the Haynes manual: pg. 126 has a diagram of the mix screw. Pg. 128 read "carburetor settings" and see pic of mix screw. As stumplifter mentioned 2.5 turns from soft bottom is a good start. Hope this help.

    Gary H.
     
    rocs82650, Dec 25, 2014
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  9. fiveofakind

    fiveofakind Well-Known Member

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    Components of pilot mixture screw hole

    [​IMG]
     
    fiveofakind, Dec 25, 2014
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  10. XJ550H

    XJ550H Well-Known Member Premium Member

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    XJ550H, Jan 15, 2015
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  11. dizzycow

    dizzycow Member

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    Idk if you read the rest of this thread but my question has been thoroughly answered and i know how to use google. Thanks though xj550
     
    dizzycow, Jan 15, 2015
    #11

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