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Thread: 1985 250es carb question

  1. #1
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    1985 250es carb question

    Hey everyone,
    First post, I usually find answers to my question using search, but this one I couldn't find.

    Im in the process of rebuilding my carb for the first time on my 85 250es. Now before I let it sit for a couple of years it ran and idled fine with no issues I can remember.

    After watching a few videos and taking my carb apart. I found that im missing the "main nozzle". ( I believe that's what its called".

    you can see it protruding when you open up the throttle and look through the carb, which on my carb you can just see the hole.

    So my question is;
    Is it ok to run without it?
    and what exactly does it do?

    Should I try and find one before I put this back together?

    and does anyone know where I can find one.

    Thanks
    Last edited by ajax; 12-23-2018 at 11:48 PM.

  2. #2
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    I think you're talking about the main jet needle. If that's gone it will not run, so yes, you'll have to replace it. There are very few pieces you can leave out of a carburetor and still have it run.
    85 Tri-Zinger 60
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  3. #3
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    Part number 2 ?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #4
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    Part # 20,
    Here is a pic from a video on the rebuild.
    the first hole is where the needle comes through #2.
    im talking about #20 , you can see it protruding in the picClick image for larger version. 

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  5. #5
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    That might be what your pilot jet goes into. Either way, you're going to need it.
    85 Tri-Zinger 60
    85 ATC250SX
    86 ATC250SX
    87 ATC250SX
    02 XR650L conversion
    84 ATC 480R

  6. #6
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    May 2007
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    Phoenix
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    Thanks,
    I found a couple of OEM carbs on ebay and it looks like between the three I will have two complete carbs.
    so next time I need to mess with it I can just replace and have no down time.

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