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Thread: Small o-ring under carb bowl gasket

  1. #1
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    Default Small o-ring under carb bowl gasket

    Hello all,

    Rebuilding the carbs on 1983 GS1100ED. So in reading the shop manual, there is a picture of a small o-ring that fits between the bowl and the bowl gasket. In fact, the shop manual calls out being very careful to make sure its aligned when reassembling. During my disassembly, i found that none of my 4 carbs had this o-ring installed. The rebuild kit that i got of Amazon contained a small o-ring that fit in that location so i was careful to align it and get is seated when i reconnected the bowl. However, on one of the bowls, i had to remove it after i had everything reattached. Of course, i forgot about this small o-ring and lost it during this removal. So, im now short one o-ring. I thought i would just order one off of Partszilla. However, in looking at the parts diagram, this small o-ring is not shown. So, questions:

    1) What is this o-ring used for? It appears to be giving space for a very, very tiny orifice.
    2) Since the carb did not have it installed previously, is it actually needed? Seems like the gasket covering the opening would do the same thing.
    3) If i do need it, can someone point it out on the parts diagram? Can you just tell me the number on the diagram so i can order a new one?

    Best Regards,

    Darrell
    Darrell
    1983 GS1100ED (red) / 1983 GS1100ED (blue)

  2. #2
    Nessism's Avatar
    Nessism is offline Forum LongTimer GSResource Superstar
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    Default

    Can you add a photo?

    Edit: that O-ring sounds like the one that seals off the metal plug passing through to the carb throat. The plug is taper shaped and wedges into place in the carb body but on occasion they pop loose, thus the O-ring. Most people don't worry about them but in my opinion they are a good idea to use. You should be able to find a suitable O-ring in a Harbor Freight kit or at a good hardware store.
    Last edited by Nessism; 04-29-2021 at 06:23 PM.

  3. #3
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    Default Page from service manual

    IMG_9023.jpg


    Page from service manual
    Darrell
    1983 GS1100ED (red) / 1983 GS1100ED (blue)

  4. #4
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    Default

    IMG_9022.jpg

    Closer pix of service manual pix
    Darrell
    1983 GS1100ED (red) / 1983 GS1100ED (blue)

  5. #5
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    Pix of actual carb..

    IMG_9021.jpg
    Darrell
    1983 GS1100ED (red) / 1983 GS1100ED (blue)

  6. #6
    salty_monk's Avatar
    salty_monk is offline Forum LongTimer GSResource Superstar
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    I've never used an O-ring there although I'm sure Ed is right (he usually is!)

    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold

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