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Mikuni 29mm carbs from KZ1000 on GS1000

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    Mikuni 29mm carbs from KZ1000 on GS1000

    Well, today I bought a GS550 engine to tear down and learn about before rebuilding by '79 GS1000 into an 1100 using the Wiseco kit. The guy I bought the engine from had a shed full of parts, including about a dozen carbs, and said his set of 29mm Mikunis taken from a KZ1000 would be a great replacement for the stock VM26. So, I bought them for a whopping $20 thinking what the hell.

    The new carbs are really similar to what is on my GS. The choke on the clutch side rather than in the middle. It has an accelerator pump on the bottom of #2. The pods diameter is identical.

    So, did I waste $20 on a gamble, or will the KZ1000 carbs bolt on the GS1000?

    Also, where do I measure to verify that these are really 29mm?

    Yes I'm a rookie. Thanks.

    #2
    in either case if they fit or not, your 20.00 carbs are worth at least 250.00 o rway higher if you get the right guy that really wants them..measure the inside diameter on the engine side and that will tell the size.
    Last edited by chuck hahn; 03-13-2010, 10:02 PM.
    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


      #3
      I think you got a set of 28mm pumpers.

      Comment


        #4
        Yup, the 29s don't have a pump.
        1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
        1985 GS1150ES stock with 85 Red E bodywork.

        Comment


          #5
          Originally posted by TeamDar View Post
          I think you got a set of 28mm pumpers.
          Exactly

          Very nice upgrade, or a valuable asset

          I'd sodablast them, clean and replace the rubber bits

          I'll give you $21 for them
          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


            #6
            21.25.......
            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


              #7
              C'mon guys
              1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
              1985 GS1150ES stock with 85 Red E bodywork.

              Comment


                #8
                WHAT!!! WHAT DID WE DO???????? Just beat you to the punch!!!!! LOL
                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


                  #9
                  Originally posted by chef1366 View Post
                  C'mon guys
                  bill,
                  where did you get the jack me smiley???
                  thats cool as hell...fits this topic perfect

                  Comment


                    #10
                    Originally posted by big t View Post
                    exactly

                    very nice upgrade, or a valuable asset

                    i'd sodablast them, clean and replace the rubber bits

                    i'll give you $21 for them
                    lmao...........

                    Comment


                      #11
                      Originally posted by Big T View Post
                      Exactly

                      Very nice upgrade, or a valuable asset

                      I'd sodablast them, clean and replace the rubber bits

                      I'll give you $21 for them
                      So will they work, and if so should I disconnect the pump? C'mon. Little help for the new guy

                      Comment


                        #12
                        Originally posted by OhioGS1000L View Post
                        So will they work, and if so should I disconnect the pump? C'mon. Little help for the new guy
                        I'd use the pump but before even attempting to install those carbs they should be fully torn down, cleaned, and replace all the O-rings inside. Cycleorings.com may have a kit that will work otherwise you will have to scramble some but finding O-rings isn't that hard.
                        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


                          #13
                          While fairly rare, there were sets of VM29's sold with an accelerator pump. Plus there was a Mikuni add-on kit to install an accelerator pump on VM29's.

                          All those fatory fitted sets had the 17mm hex head drain plug on the float bowls.

                          Comment


                            #14
                            Originally posted by OhioGS1000L View Post
                            So will they work, and if so should I disconnect the pump? C'mon. Little help for the new guy
                            Yes, they will work

                            Leave the pump connected

                            Clean them up like any other VM, I don't know if the O rings are different than the 26s
                            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


                              #15
                              Originally posted by Big T View Post
                              Yes, they will work

                              Leave the pump connected

                              Clean them up like any other VM, I don't know if the O rings are different than the 26s
                              I think they are 28mm. Calipers read between 28.3 and 28.7, they came off of a KZ1000A, and I found a couple online posts about that model having a 28mm pumper.

                              Probably going to be a nighmare to set up properly.

                              Comment

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