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O'rings for throttle shaft

Discussion in 'XJ Technical Chat' started by Glen F., Apr 11, 2020.

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  1. Glen F.

    Glen F. Active Member

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    She started, reved to 4000 and slowly faded and stalled. Checked the plugs, and all are black and sooty. Plug 1 had just a touch of gas on it. Not sure what to do now.
     
    Glen F., Jul 14, 2020
    #141
  2. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Air jets (under the rubber diaphram up top) in reversed positions? The smaller of the 2 air jets is fitted to the CENTER hole.
     
    chacal, Jul 14, 2020
    #142
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  3. Glen F.

    Glen F. Active Member

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    I'll take them off one more time and check that out.
     
    Glen F., Jul 14, 2020
    #143
  4. Glen F.

    Glen F. Active Member

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    How do I tell which is which?
     

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    Glen F., Jul 14, 2020
    #144
  5. Glen F.

    Glen F. Active Member

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    Took them out and you are correct. Better check them all since I have the carbs out.
     
    Glen F., Jul 14, 2020
    #145
  6. XJ550H

    XJ550H Well-Known Member Premium Member

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    there are numbers on the top of them t
    jets.jpg
     
    XJ550H, Jul 14, 2020
    #146
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  7. Glen F.

    Glen F. Active Member

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    I switched those two around, checked the others, put the carbs back in and now it won't start. I couldn't see any numbers. Mind you my eyes work better without glasses at close range.
     
    Glen F., Jul 14, 2020
    #147
  8. Glen F.

    Glen F. Active Member

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    Killed the battery again. Frustrated and walked away for tonight. How far out should the screw being the carbs be?
     
    Glen F., Jul 14, 2020
    #148
  9. Glen F.

    Glen F. Active Member

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    So woke up early and read and watched videos and decided to take the carbs out again. Rechecked everything for the floats, and bench synced again. Found that the butterflys don't snap back the way they should. What could be causing that.
     
    Glen F., Jul 15, 2020
    #149
  10. Huntchuks

    Huntchuks Well-Known Member

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    Misalignment when screwing them back on may cause one to bind on one side against the carb body.
     
    Huntchuks, Jul 15, 2020
    #150
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  11. Glen F.

    Glen F. Active Member

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    I only loaded one spring. Idiot. Slow down.
     
    Glen F., Jul 15, 2020
    #151
  12. Glen F.

    Glen F. Active Member

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    I have everything back together. Still won't start. Might my needles be bad? Seems like it isn't getting gas.
     
    Glen F., Jul 16, 2020
    #152
  13. k-moe

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

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    It's not likely to be a problem with the needles.
    Take a break for a few days and come back to her with fresh eyes. Don't even think about the bike while you're on that break.
     
    k-moe, Jul 16, 2020
    #153
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  14. Glen F.

    Glen F. Active Member

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    I'm on vacation right now and I want to ride! How can I not think about it. Still going to keep trying. Seems to try to start when it's not on the center stand.
     
    Glen F., Jul 16, 2020
    #154
  15. k-moe

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

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    Revisit fuel flow and confirm your wet float levels.
     
    k-moe, Jul 17, 2020
    #155
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  16. Glen F.

    Glen F. Active Member

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    Pretty sure I have them in spec. Can someone look at the attachment and let me know.
     

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    Glen F., Jul 17, 2020
    #156
  17. Huntchuks

    Huntchuks Well-Known Member

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    Looks to be about 2 mm below seam. What bike do you have? Looks like Hitachi carbs and probably should be +/- 1 mm.
     
    Huntchuks, Jul 17, 2020
    #157
  18. Glen F.

    Glen F. Active Member

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    650 Maxim 1982
     
    Glen F., Jul 17, 2020
    #158
  19. Huntchuks

    Huntchuks Well-Known Member

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    NOTE: all of the following models used HSC32 carbs:
    XJ650 Maxim, Midnight Maxim, XJ650RJ Seca (non-turbo), XJ650 Euro all use HSC32 carbs (various versions)
    XJ750 all USA 1981-83 models use HSC32 version 5G200 (Seca) and 15R00 (Maxim and Midnight Maxim)
    XJ750 all Canadian 1981-83 models use HSC32 version 5H200 (Seca) and 15T00 (Maxim and Midnight Maxim)
    XJ750 UK/Europe 11M models, XJ750 Police models 24L and 37H use HSC32 version 5N100

    -Fuel level measured via the clear-tube gauge: 3mm +/- 1mm (.12 +/- .04 inches)

    Looks like you should be ok in this case.
     
    Huntchuks, Jul 17, 2020
    #159
  20. Glen F.

    Glen F. Active Member

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    That's what I thought. Just not sure why it won't start.
     
    Glen F., Jul 17, 2020
    #160
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