Missing Carb part

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  • Ntolerance
    • Feb 2026

    #1

    Missing Carb part

    I think I am missing one of these plugs. When I took my carbs apart, I noticed one was missing - I'm 99% sure It was missing when I took the bowls off.
    I am not 100% sure which carb was missing it but it was #2 or #3.

    Am I supposed to have four? They fell out when I flipped the carbs over. I didn't think they would fall out.

    Suppose I could have missed it fall out earlier, but I took a close look at the carbs and I am very very sure it wasn't in there when I started.

    Whats this called? Do I need a fourth? Where do I get one?
    Attached Files
  • londonboards
    Forum Sage
    Past Site Supporter
    • Aug 2012
    • 1168
    • Canterbury, UK

    #2
    If it's there on the other 3, you should plug that somehow or you may find the fuel leaking out of the bowl.

    In later model carbs, these holes were permanently filled.
    Richard
    sigpic
    GS1150 EF bought Jun 2015
    GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
    GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
    GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
    Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
    Join the United Kingdom (UK) Suzuki GS Facebook Group here

    Comment

    • chuck hahn
      Forum LongTimer
      Past Site Supporter
      • May 2009
      • 25918
      • Norman, Oklahoma

      #3
      Yes you need all 4. Check the old gaskets to see if its stuck to it.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

      • Steve
        GS Whisperer
        • Jun 2005
        • 35925
        • southwest oHIo

        #4
        Not only will you need the plug, there is a square-section o-ring that will go between the plug and the bowl gasket. It keeps the plug from falling out.

        .
        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
        Family Portrait
        Siblings and Spouses
        Mom's first ride
        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
        (Click on my username in the upper-left corner for e-mail info.)

        Comment

        • Ntolerance

          #5
          Originally posted by Steve
          Not only will you need the plug, there is a square-section o-ring that will go between the plug and the bowl gasket. It keeps the plug from falling out.

          .
          i have the four quad rings. Some how I must've lost that plug.

          Is the plug plug the same as the one pictured from an eBay auction ?
          Attached Files

          Comment

          • Steve
            GS Whisperer
            • Jun 2005
            • 35925
            • southwest oHIo

            #6
            No, that plug is the one that (needlessly) seals the top of the mixture screw. It is far too small to plug the hole you have.

            Let me check my spare parts, I might have one.

            .
            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
            Family Portrait
            Siblings and Spouses
            Mom's first ride
            Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
            (Click on my username in the upper-left corner for e-mail info.)

            Comment

            • Nessism
              Forum LongTimer
              GSResource Superstar
              Past Site Supporter
              Super Site Supporter
              • Mar 2006
              • 35790
              • Torrance, CA

              #7
              Those plugs are typically swedged in place pretty tight. I've had them fall out before though and needed a replacement. I wound up cutting apart an old dead carb body just for that plug. Very doable. I think there are two different sizes for those plugs though. What size do you need (measure the hole with calipers)?
              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

              • Ntolerance

                #8
                Anyone have a partnumber ?

                Comment

                • Steve
                  GS Whisperer
                  • Jun 2005
                  • 35925
                  • southwest oHIo

                  #9
                  Sorry, there is no part number.

                  I will be in my shop tomorrow, I will take a look to see if I have one.

                  .
                  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
                  Family Portrait
                  Siblings and Spouses
                  Mom's first ride
                  Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                  (Click on my username in the upper-left corner for e-mail info.)

                  Comment

                  • chuck hahn
                    Forum LongTimer
                    Past Site Supporter
                    • May 2009
                    • 25918
                    • Norman, Oklahoma

                    #10
                    I think I would measure one that came out and see if I could find some metric rod the same OD. Then make a slice and grind it to the same thickness. Its a plug closing the hole they needed to drill passages during production.
                    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                    Comment

                    • bobgroger
                      Forum Sage
                      Past Site Supporter
                      • Jun 2013
                      • 2481
                      • Enumclaw, WA

                      #11
                      it is a "permanent" part of the carb body. You need to get one from another carb, or get another body.
                      sigpic
                      09 Kaw C14 Rocket powered Barcalounger
                      1983 GS1100e
                      82\83 1100e Frankenbike
                      1980 GS1260
                      Previous 65 Suzuki 80 Scrambler, 76 KZ900, 02 GSF1200S, 81 GS1100e, 80 GS850G

                      Comment

                      • chuck hahn
                        Forum LongTimer
                        Past Site Supporter
                        • May 2009
                        • 25918
                        • Norman, Oklahoma

                        #12
                        Yes its required and I have had them stick to the gasket and come out too. Very very close fit but now and then they do fall out.
                        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                        Comment

                        • Nessism
                          Forum LongTimer
                          GSResource Superstar
                          Past Site Supporter
                          Super Site Supporter
                          • Mar 2006
                          • 35790
                          • Torrance, CA

                          #13
                          I've got a busted carb body that I could hack apart and extract the plug. Do you have calipers to measure the hole size?
                          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

                          • chuck hahn
                            Forum LongTimer
                            Past Site Supporter
                            • May 2009
                            • 25918
                            • Norman, Oklahoma

                            #14
                            I think they are all the same size Ed.
                            MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                            1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                            NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                            I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                            Comment

                            • Steve
                              GS Whisperer
                              • Jun 2005
                              • 35925
                              • southwest oHIo

                              #15
                              Originally posted by Steve
                              Sorry, there is no part number.

                              I will be in my shop tomorrow, I will take a look to see if I have one.

                              .
                              I have one.

                              Send me a PM with an address.

                              .
                              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
                              Family Portrait
                              Siblings and Spouses
                              Mom's first ride
                              Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                              (Click on my username in the upper-left corner for e-mail info.)

                              Comment

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