Pilot Jet Incorrect?

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  • swishalump
    Forum Newbie
    • Aug 2023
    • 11
    • Reno, NV
    #1

    Pilot Jet Incorrect?

    Hello all!

    Currently tearing down and rebuilding the carbs for my '78 GS550. My pilot jet doesn't match the one in BassCliffs rebuild guide and I'm just curious if a PO swapped them or if the VM22's had different setups for different engine displacements. Thanks y'all!
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    1978 GS550
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    • 1978GS750E
      Forum Sage
      Past Site Supporter
      Super Site Supporter
      • Apr 2016
      • 1242
      • Lexington, KY
      #2
      This may help? IIRC, I think I found this on the bikecliff site?
      Suzuki Carb Specs.jpg
      Ron
      '78 GS1000E, '79 GS850G, '82 GS1100E, 2022 Triumph Tiger 660 Sport

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        • Nessism
          Forum LongTimer
          GSResource Superstar
          Past Site Supporter
          Super Site Supporter
          • Mar 2006
          • 35787
          • Torrance, CA
          #3
          VM carbs take the tall pilot jets.

          Edit: I take this back. Go to eBay and search "GS550 carburetors", toggle used, then look at photos. The pilot jet is flush with the top of the carb passage.
          Last edited by Nessism; 09-27-2023, 06:57 PM.
          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

            • unfocused
              Forum Mentor
              Past Site Supporter
              • Jul 2019
              • 384
              • St. Augustine, FL
              #4
              If needed, I can open up a set of VM 22's I have at home and verify.

              Please advise
              Current:
              1993 ZX11 - 2nd build in progress
              1977 GS750 (710 is getting closer)
              1998 Kawasaki Voyager - selling
              1998 Chevy C2500
              1999 Rav4

                Comment

                • KiwiAlfa156
                  Forum Mentor
                  • Sep 2012
                  • 661
                  • New Zealand
                  #5
                  image.png​

                  I'm 98% sure that the VMs in question should have these. I don't think the longer external pilot jets are interchangeable with these? The Suzuki part no. is 09492-15007, and the size is # 15
                  Last edited by KiwiAlfa156; 09-28-2023, 05:02 PM.
                  82 GSX1100SXZ Katana
                  82 GSX750SZ Katana
                  82 GS650GZ Katana

                    Comment

                    • swishalump
                      Forum Newbie
                      • Aug 2023
                      • 11
                      • Reno, NV
                      #6
                      Thanks for the responses! I'll stick with what's in there just wanted to double check. The one I have appears stock at size 15.
                      1978 GS550

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