GSX750ES Carburetor coating

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  • dpascal
    • Jan 2026

    #1

    GSX750ES Carburetor coating

    As part of my restoration I dis-assembled my 4 carbs into the smallest parts and very thoroughly cleaned them only to realize that after 129,000 km the carbs aluminium looks bad. It has a blue grey color with black stains that look like aluminium oxidation.
    Other than paint, is there any other known coating used to restore the shine of the aluminum of the carbs ?
    I can achieve that with a Dremel tool + a gentle brass brush head but it will not last long before new corrosion will be visible..
  • Agemax
    Forum Guru
    • Apr 2008
    • 8371
    • plymouth uk

    #2
    get them soda blasted and coat them with ACF-50
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

    Comment

    • dpascal

      #3
      Great idea. I have this corrosion prevention solution instaed :

      Comment

      • Agemax
        Forum Guru
        • Apr 2008
        • 8371
        • plymouth uk

        #4
        thats ok if you want your carbs smothered in grease!
        1978 GS1085.

        Just remember, an opinion without 3.14 is just an onion!

        Comment

        • JTGS850GL
          Forum Guru
          Past Site Supporter
          • Aug 2013
          • 9735
          • GA

          #5
          I was wondering about that. Seems that a light oil would attract dirt.
          http://img633.imageshack.us/img633/811/douMvs.jpg
          1980 GS1000GT (Daily rider with a 1983 1100G engine)
          1998 Honda ST1100 (Daily long distance rider)
          1982 GS850GLZ (Daily rider when the weather is crap)

          Darn, with so many daily riders it's hard to decide which one to jump on next.;)

          JTGS850GL aka Julius

          GS Resource Greetings

          Comment

          • Big T
            Forum LongTimer
            Past Site Supporter
            Super Site Supporter
            • Mar 2005
            • 12391
            • West Slope, OR

            #6
            Chuck Hahn was using some aluminum product a while back, Aluminator?

            Chuck?

            Otherwise, soda or vapor blasting will clean them up
            1978 GS 1000 (since new)
            1979 GS 1000 (The Fridge, superbike replica project)
            1978 GS 1000 (parts)
            1981 GS 850 (anyone want a project?)
            1981 GPZ 550 (backroad screamer)
            1970 450 Mk IIID (THUMP!)
            2007 DRz 400S
            1999 ATK 490ES
            1994 DR 350SES

            Comment

            • JTGS850GL
              Forum Guru
              Past Site Supporter
              • Aug 2013
              • 9735
              • GA

              #7
              I soda blast but have never used a coating afterwards. Never seemed to need it.
              http://img633.imageshack.us/img633/811/douMvs.jpg
              1980 GS1000GT (Daily rider with a 1983 1100G engine)
              1998 Honda ST1100 (Daily long distance rider)
              1982 GS850GLZ (Daily rider when the weather is crap)

              Darn, with so many daily riders it's hard to decide which one to jump on next.;)

              JTGS850GL aka Julius

              GS Resource Greetings

              Comment

              • Nessism
                Forum LongTimer
                GSResource Superstar
                Past Site Supporter
                Super Site Supporter
                • Mar 2006
                • 35787
                • Torrance, CA

                #8
                The carb bodies are zinc, not aluminum. If you media blast them they will look nice for a good long while. Soda is not very aggressive so if the carbs are heavily corroded you may need something more aggressive like glass bead. Blasting the steel parts will remove the plating though so keep this in mind.
                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

                Comment

                • dpascal

                  #9
                  Originally posted by JTGS850GL
                  I was wondering about that. Seems that a light oil would attract dirt.
                  Corrosion block grease does not attract dirt since you need to wipe it off and that leaves a protective microscopic coating.

                  Comment

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