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Discussion Almost lost a needle

Discussion in 'Yamaha 250cc In-Line 4's' started by logan anderson, Nov 10, 2021.

  1. logan anderson

    logan anderson Active Member

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    So here's one for you

    Going up a fairly steep hill here over the weekend, I lost a good deal of power, bike burbled past quarter throttle and didn't pickup any power until 12k

    Pulled the carbs today to find this, the clip was floating around the diaphragm


    [​IMG]
     
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    logan anderson, Nov 10, 2021
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  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Dang that was lucky
     
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    ruckusman, Nov 10, 2021
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  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Nov 11, 2021
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  4. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Those e-clips aren't very robust - I put a pair of smooth faced pliers on them and give them a wee squeeze once reinstalled
     
    ruckusman, Nov 11, 2021
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  5. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I've had this happen on one of my 3LN's in the past, it was not a fun experience. Aftermarket clips were no good, I put the originals back in and it never happened again.
     
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    • Informative Informative x 1
    Linkin, Nov 11, 2021
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  6. logan anderson

    logan anderson Active Member

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    mmm, maybe I will pull it back apart and replace the other clips with the ones from the spare carb
     
    logan anderson, Nov 11, 2021
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  7. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Make sure you have the clip, metal washer and the plastic shim all fitted.
     
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    Linkin, Nov 11, 2021
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  8. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Check this post for clarification of the needle/shim settings - if you have 4 x 5CT7 needles, the 05.mm shim washer should be below the centre two needles

    The table at the top of the page with the 3LN1 settings has an error in that regard
    https://www.2fiftycc.com/index.php?...settings-specs-3ln-3yx-zeal.9787/#post-112136
     
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    ruckusman, Nov 11, 2021
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