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What is the proper tuning for BS34?

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    #1

    What is the proper tuning for BS34?

    Hey guys,

    I have been cleaning and procrastinating on my carb cleaning. I keep getting hung up on the screw/jet tuning. I heard that on mine, everything is meant to be snug- factory setting.

    However I don't know how tight to make the pilot screw (I believe that's the correct name I read in a tutorial).



    I'm also just assuming these exact carbs (Mikuni 44460 C281) are OEM.

    This has been a battle of wits indeed lol. I ordred the wrong float bowl gaskets from bike bandit too, so I'm in shambles




    Thanks everyone!

    P.S jsut an update, I just got a porting job at a Ducati (European bikes and EBRs) dealer recently and I'm waiting for my moment to ask for help without seeming like an entitled *******. haha
    Tags: pilot screw tuning
    #2
    The mixture switch, what's outside and on top, is not to be made snug. It must be started turned out at 21/2 to 3 full turns from lightly tight to ensure the proper amount of air/fuel is provided. Have you read the carb rebuilding tutorial on Basscliff's site yet?
    Cowboy Up or Quit. - Run Free Lou and Rest in Peace

    1981 GS550T - My First
    1981 GS550L - My Eldest Daughter's - Now Sold
    2007 GSF1250SA Bandit - My touring bike

    Sit tall in the saddle Hold your head up high
    Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
    and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

    Comment

      #3
      Originally posted by cowboyup3371 View Post
      The mixture switch, what's outside and on top, is not to be made snug. It must be started turned out at 21/2 to 3 full turns from lightly tight to ensure the proper amount of air/fuel is provided. Have you read the carb rebuilding tutorial on Basscliff's site yet?
      I'll try that then. Is the mixture switch the one in my first photo?

      Is his this one: Mikuni BS (CV) Carburetor Rebuild Tutorial www.mtsac... etc?

      Comment

        #4
        Yep, what he said... start 2 1/2 turns out from seated and go from there.
        1982 GS450E - The Wee Beastie
        1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

        sigpic

        450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

        Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

        Comment

          #5
          Originally posted by pete View Post
          Yep, what he said... start 2 1/2 turns out from seated and go from there.
          lol.. I misread.. I almost got to 21 turns...

          Okay 2 1/2 turns haha

          Comment

            #6
            Hahahaah that would've been interesting!
            1982 GS450E - The Wee Beastie
            1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

            sigpic

            450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

            Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

            Comment

              #7
              Originally posted by pete View Post
              Hahahaah that would've been interesting!
              hahaha yeah "is it supposed to put a huge hole through the other side??!"

              Comment

                #8
                well it took a little while to figure out what was lightly tight, but I do believe I have it a good place now. Worst case is that I just play with it when the bike runs.... if it runs..

                Comment

                  #9
                  Yeah it can be awkward the first time to feel it just seating, but once you get it you'll be right.
                  1982 GS450E - The Wee Beastie
                  1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                  sigpic

                  450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                  Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                  Comment

                    #10
                    Sorry, I saw it before I posted but forgot to change it.
                    Cowboy Up or Quit. - Run Free Lou and Rest in Peace

                    1981 GS550T - My First
                    1981 GS550L - My Eldest Daughter's - Now Sold
                    2007 GSF1250SA Bandit - My touring bike

                    Sit tall in the saddle Hold your head up high
                    Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
                    and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

                    Comment

                      #11
                      Originally posted by cowboyup3371 View Post
                      Sorry, I saw it before I posted but forgot to change it.
                      no worries haha

                      Comment

                        #12
                        Oh btw- Does anyone know a reliable place to purchase the float bowl gaskets?

                        Comment

                          #13
                          Z1 enterprises, Partsoutlaw.com, etc etc etc
                          Cowboy Up or Quit. - Run Free Lou and Rest in Peace

                          1981 GS550T - My First
                          1981 GS550L - My Eldest Daughter's - Now Sold
                          2007 GSF1250SA Bandit - My touring bike

                          Sit tall in the saddle Hold your head up high
                          Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
                          and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

                          Comment

                            #14
                            Originally posted by cowboyup3371 View Post
                            Z1 enterprises, Partsoutlaw.com, etc etc etc
                            okay thanks!

                            Comment

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