1980 GS550L Carb Leak

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  • Revjoel
    • Mar 2026

    #1

    1980 GS550L Carb Leak

    It appears that my carb floats have soaked up quite a bit of ethanol. Does anyone know where I can find brass floats for this bike? Or have a possible repair for floats that have soaked up ethanol and are causing a leak?
  • Redman
    Forum LongTimer
    Past Site Supporter
    Super Site Supporter
    • Mar 2004
    • 13764
    • Michigan, west Michigan

    #2
    Do floats looked deformed? Or feel heavy? Can you tell if gas is inside the floats?

    I have not heard of this before, but then again, I am not that much of a gear head.

    Have heard of E fuel causing problems with fuel system rubber parts.
    Can anyone say if it causes problems with our carb floats...?

    .
    Bikes
    Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

    Comment

    • tom203
      Forum Guru
      Past Site Supporter
      • Aug 2010
      • 8925
      • Norway,Maine

      #3
      Originally posted by Redman
      Do floats looked deformed? Or feel heavy? Can you tell if gas is inside the floats?

      I have not heard of this before, but then again, I am not that much of a gear head.

      Have heard of E fuel causing problems with fuel system rubber parts.
      Can anyone say if it causes problems with our carb floats...?

      .
      The ethanol probably adds a nice sugary coating to floats helping them stay buoyant : But I wonder about some carb cleaner solutions.
      1981 gs650L

      "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

      Comment

      • eil
        Forum Sage
        • Dec 2012
        • 3062
        • SE Michigan

        #4
        soaked up quite a bit of ethanol
        I don't think that's actually a thing.
        Charles
        --
        1979 Suzuki GS850G

        Read BassCliff's GSR Greeting and Mega-Welcome!

        Comment

        • Steve
          GS Whisperer
          • Jun 2005
          • 35927
          • southwest oHIo

          #5
          Can't even begin to count how many sets of carbs I have worked on over the years and have never seen floats that appeared to have "soaked up some ethanol".

          And please explain how that would "cause a leak". Where is the leak? What is leaking?

          .
          sigpic
          mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
          hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
          #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
          #2 son: 1980 GS1000G
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          • Nessism
            Forum LongTimer
            GSResource Superstar
            Past Site Supporter
            Super Site Supporter
            • Mar 2006
            • 35809
            • Torrance, CA

            #6
            Carb rebuild tutorial linked in my signature. Check the Newbie Mistakes thread too. Sounds like a bike in need of maintenance.
            Ed

            To measure is to know.

            Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

            Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

            Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

            KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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