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xj650 seca, 1981, main air jets

Discussion in 'XJ Technical Chat' started by jamcam1999, Feb 25, 2011.

  1. jamcam1999

    jamcam1999 Member

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    Has anyone tried running an xj650 seca (Hitachi carbs) with slightly larger main air jets in the carbs? The specs call for #50 main air jets and I am wondering what will happen if I run the bike with #55 jets instead.
    Thanks in advance for your opinions.
     
    jamcam1999, Feb 25, 2011
    #1
  2. hardlucktx

    hardlucktx Member

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    If you add a larger fuel jet you have to increase the air intake also or you will run rich.
     
    hardlucktx, Feb 25, 2011
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  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Why would you want to increase the mains?
     
    bigfitz52, Feb 26, 2011
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  4. jamcam1999

    jamcam1999 Member

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    The reason I was thinking about using the #55 mains was because that is the closest size I have to the stock size #50 jets. I have 3 sets of carbs all torn apart and none of them are stock. Too bad people can't leave things stock instead of all the changing that has been done on these carbs that I am struggling with.
    I am mainly trying to fix up a set of carbs as cheaply as possible without adversely affecting the bikes operation. Thanks for your input.
     
    jamcam1999, Feb 26, 2011
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