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Have to keep choke on to keep bike running

Discussion in 'XJ Technical Chat' started by Drauff, Jun 30, 2009.

  1. Drauff

    Drauff Member

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    Hey All,
    I have a 82 xj750 maxum that won't keep running unless you keep the choke on a little. Is this telling me that it is running to lean? I have pulled the plugs and they look pretty good with it running like that. I just bought this bike and trying to figure out how to fix. Thanks, Bryan
     
    Drauff, Jun 30, 2009
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  2. Shannon72

    Shannon72 Member

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    I would say yes - with the choke on, you're running your enrichment circuit, which is adding gas to your mix. If the plugs are tan running with the choke on...well, that's probably not right.
     
    Shannon72, Jun 30, 2009
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  3. MadMaxim85

    MadMaxim85 Member

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    Have you adjusted the idle screw? Perhaps it needs to be turned in a bit...
     
    MadMaxim85, Jun 30, 2009
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  4. Carvall

    Carvall Member

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    Check the the floats! it seems like it is to low.
     
    Carvall, Jul 1, 2009
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  5. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Dirty carbs is the first thing that I would be looking at. Pull them off and pull the float bowls. That will tell the whole story.

    MN
     
    MN-Maxims, Jul 1, 2009
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  6. Carvall

    Carvall Member

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    I agree with MN-Maxims. Regardless of what the bike is doing I would clean the carburetors.
     
    Carvall, Jul 1, 2009
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  7. DianCecht

    DianCecht Member

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    It's always the Carbs. Always. Unless you're running Pod air filters, then I'd blame those. If you're running stock, something ain't right in those carbs. Always the carbs.
     
    DianCecht, Jul 1, 2009
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  8. Drauff

    Drauff Member

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    If I open the float bowls can I reuse the carb gaskets that are there? what am I looking for when I do? I have to say that I have rebuilt a few car carbs but never messed with the ones for a bike.
     
    Drauff, Jul 2, 2009
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  9. fore4runner

    fore4runner Member

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    I'd do a quick compression test on the engine as I believe if one cylinder has poor compression it can do this sort of thing (though I think it's usually only at idle).
     
    fore4runner, Jul 2, 2009
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  10. jarreddaughtry

    jarreddaughtry Member

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    yes you can reuse the carb bowl gaskets, just make sure when you take them off the first time you are very careful they have probably been stuck there a long time, and when you put them back on make sure they are good and tight but dont over do it.
     
    jarreddaughtry, Jul 2, 2009
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  11. Drauff

    Drauff Member

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    Thanks to everybody that replied. I just got the engine back from having a broken valve cover bolt removed. Frame is still at the welder getting repaired because the guy that sold it to me failed to tell me that it had a broken frame. So hopfully I can begin putting her back on the road next week.

    Has anyone tried putting a 750 seca mac exhaust on a maxim? They are basicaly the same bike as far as I can tell. If so is it good or is there something else to look at?

    Thanks,
    Bryan
     
    Drauff, Jul 2, 2009
    #11

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