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Cannot find air mixture screw anywhere

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    #1

    Cannot find air mixture screw anywhere

    Im convinced this part just doesnt exist anymore and I'm not going to get to ride this bike anymore. It's been almost a year now since this air mixture screw fell out and I havent been able to get a replacement. I've tried different years that look similar, cheap "universal" screws from amazon, even tried making my own once. Kind on my last attempt before I dump this bike.
    any help? 1981 Suzuki GS450 (i think its an S, if that matters)
    See the picture of the air mixture screw. This is the screw that you screw in from the outside of the carb and use to adjust the air/fuel mixture.
    image.png​​
    Tags: None
    #2
    image.pngAdditional picture​

    Comment

      #3
      Sudco and/or Jets R Us are the usual suspects when looking for carb parts, else your local wrecking yard.
      Paul


      sigpic




      Comment

        #4
        Does this carb body look correct? Maybe contact the seller about the mixture screw?

        1979 Suzuki GS 450 GS450S Carburetors | eBay
        https://www.ebay.com/itm/225562320019
        Used parts may exhibit scratches, dents, dings, rust, and normal wear and tear.
        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

          #5
          You might try Z-1. Got four for my GS1100E a couple of years ago. Same model of carb(BS34).
          1981 GS1100E

          Comment

            #6
            If you can get dimensions of a known good one, I'd expect this to be easily replicated on a hobbyist/tabletop-sized lathe?
            #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
            #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
            #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
            #4: 1980 Moto Guzzi V65C – Something to chill

            Comment

              #7
              ..............................

              http://www.siriusconinc.com/products/detail/122569
              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

                #8
                Originally posted by chuck hahn View Post
                ..............................

                http://www.siriusconinc.com/products/detail/122569
                Wrong part.

                The screws in question look a lot like those used in Kawasaki flavor Mikuni BS/CV carbs. I have a few of those, but the threads look a little longer. Some dimensions would be helpful.
                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

                  #9
                  I dont see it in the parts fiche
                  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

                    #10
                    Schematic for carbs for 1981 GS450ST
                    1981 Suzuki GS450ST Carburetor
                    https://www.ronayers.com/oemparts/a/suz/50d3f0b8f8700230d8b4b96f/carburetor
                    Shop online for OEM Carburetor parts that fit your 1981 Suzuki GS450ST, search all our OEM Parts or call at 252-758-3084


                    Jay, can you post a pic of your carb body to compare the two.

                    Also, if possible pick out the part number from the schematic if they do match.
                    Last edited by steve murdoch; 08-18-2023, 09:26 PM.
                    2@ \'78 GS1000

                    Comment

                      #11
                      That mixture screw looks odd….considering my 650 ones. Plus this eBay guy has ones that look different from your pic

                      New Suzuki gs450 gs 450 L & TX mikuni CARBURETOR PILOT NEEDLE SCREW | eBay
                      https://www.ebay.com/itm/305073568799?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=YRXifaZBQQ2&sssrc=4429486&ssuid=ARSR0K5ISZu&var=&widget_ver=artemis&media=COPY
                      / GS 250 T 80-81 / GSX-R1100 86-92 / GSX 600 1993 / GS750E 80-83. LT-4WD 87-98 / GS650 GS 650 81-83 / / GS1000 G GL 80-81 / GS1150 1150 84-86. YOU GET WHAT'S IN PHOTO. GS500 E 89-00 / GSXR1100 W 93-98 / GSX600 FT 88-96 /.
                      1981 gs650L

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

                      Comment

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