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Help Need help with carburetor! 1990 Yamaha fzr250r (3LN3)

Discussion in 'Yamaha 250cc In-Line 4's' started by Adam Mc, Nov 6, 2021.

  1. Adam Mc

    Adam Mc Member

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    Hello I was cleaning the carburetor and while taking it out my dad broke of a little pipe.

    Anyone know what this is called / part number? Small little pipe on the right side of the carbs when it's installed on the bike and your at the rear. 3LN3 fzr250[​IMG][​IMG]

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    Adam Mc, Nov 6, 2021
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  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    That's the choke tube - two options you can flare the end ever so gently [it's brass and will be somewhat brittle] and reinsert it to get an airtight seal, or you can just work it back in and put a small ring of epoxy to seal it back up.

    Obviously everything will need to be perfectly clean for epoxy to adhere

    AAH - I just noticed, it did break off clean leaving part of the tube in the carb body

    Do you have a hobby store close by - wondering if a small sleeve into the carb body and then epoxy to get an airtight seal will work - IIRC @GreyImport had one break like that - hopefully he can chime in

    It is something that a jeweller could help with because of the delicacy and the scale, if you could persuade the ends in the carb body out, it could be silver soldered
     
    Last edited: Nov 6, 2021
    ruckusman, Nov 6, 2021
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  3. Adam Mc

    Adam Mc Member

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    Oh good to know yeah I'll see if I can get it out and repair it then reinsert it . Thanks

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    Adam Mc, Nov 6, 2021
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  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Pretty common ... Just epoxy it back on

    choke pipe.jpg


    Choke pipe 2.JPG
     
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    GreyImport, Nov 6, 2021
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  5. Adam Mc

    Adam Mc Member

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    Yeah I'll do that thank you!

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    Adam Mc, Nov 6, 2021
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  6. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Yea tape it down into place first , then epoxy around it so none gets inside the tube etc
     
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    GreyImport, Nov 6, 2021
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  7. Adam Mc

    Adam Mc Member

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    Adam Mc, Nov 6, 2021
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  8. DannoXYZ

    DannoXYZ Well-Known Member

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    Looks like piece of it remained inside carb-body.
    If epoxy doesn't work, you can remove remnant from carb-body.
    Then insert short straight section of brass-tubing.
    Then connect with hose.
     
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    DannoXYZ, Nov 6, 2021
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  9. Adam Mc

    Adam Mc Member

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    Yeah I might try remove it anyway then glue/epoxy it

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    Adam Mc, Nov 6, 2021
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  10. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Tape it down in position (after cleaning the carb externally with a solvet and drying it off) and mix up some two part metal epoxy eg JBWeld and epoxy it in place.
     
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    Linkin, Nov 6, 2021
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  11. Gert

    Gert Well-Known Member

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