Fuel mixture screw

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  • rlg5
    • Feb 2026

    #1

    Fuel mixture screw

    HI does annyone know to reinstall the air fuel mixture screw after rebuilding the carbs i mean how the little spring little washer and o ring go back in , i dont remember what order they came out ,carbs are off a 86 gs 550esg.I cant seem to find any pictures
    THANKS !!!!
  • Ton1959

    #2
    You don't mean spring, washer, o ring?

    Comment

    • ART

      #3
      In order they go on: Spring, washer, o-ring.

      Comment

      • Thumper88
        Forum Mentor
        • Jun 2012
        • 127
        • Ann Arbor, MI

        #4
        1982 Suzuki GS450TZ
        1982 Suzuki GS1100EZ

        Comment

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

          #5
          spring,washer,o ring. that way o ring seals up against the seat and the washer stops the spring from chewing up the o ring as you turn the screw.
          1978 GS1085.

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

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          • OLDENUFF

            #6
            I agree with agemax. Spring, washer,oring.

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            • trippivot
              Forum Sage
              Past Site Supporter
              • Aug 2006
              • 2815
              • Des Moines , IA

              #7
              picture is WRONG!

              Originally posted by Thumper88
              you want the Oring to seal against the carb body and the washer to protect the o ring from the spring and the spring prevents the screw from dropping out. .

              spring onto mixture screw first
              washer onto mixture screw next to the spring -
              O-ring goes on last last. and it holds them on the mixture screw while you install the assy into carb body.

              install until lightly fully seated. then come out 2 full turns and begin carb idle drop tuning from there. (bike will start easier if you do it that way. )
              SUZUKI , There is no substitute

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              • rlg5

                #8
                fuel mixture screw

                Thanks a bunch guys!!

                Comment

                • gbeckhart

                  #9
                  Hey Guys, need some help here. I have an 82 GS650 which according to manual uses Mikuni BS32 ss carburetors. I am looking for the air/fuel mixture screws that go on top front of each carburetor. I cannot seem to find the correct part number. I do see these screws for GS750 and GS1100 but nothing for the 650. Any of you would happen to know what would be the part number or where I can purchase these screws?

                  Thanks All, good and safe riding!

                  Comment

                  • P09luis
                    Forum Apprentice
                    Past Site Supporter
                    Super Site Supporter
                    • Mar 2016
                    • 52
                    • Texas

                    #10
                    Did you ever find the part number for that air fuel mixture screw? I need one or a set for my GS1100 and can't find the part number anywhere

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