GS850G Muniki Carb Diaphragm

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  • Paul44
    • Jan 2026

    #1

    GS850G Muniki Carb Diaphragm

    I have recently bought a GS850G which needs one of the carburetor diaphragms replaced. I have sourced the parts and will change all 4 because they are not in the best shape:



    My question is, how are the new diaphragms secured to the slides? I read somewhere that I have to cut the plastic retainers to remove the old diaphragm but I cannot find the replacement retainers anywhere.

    Any advice anyone can offer is greatly appreciated.
  • Nessism
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    Super Site Supporter
    • Mar 2006
    • 35787
    • Torrance, CA

    #2
    This website has some good info on how to replace diaphragm's...http://jbmindustries.com/
    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

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    • Paul44

      #3
      Excellent, I found the information I need, thanks a lot! :-)

      Crazy how much the diaphragms cost but I guess its a captive audience, if you need them then you gotta pay!

      Comment

      • Steve
        GS Whisperer
        • Jun 2005
        • 35924
        • southwest oHIo

        #4
        If you think those are expensive, you don't want to check the price of OEM diaphragms.
        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
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        Comment

        • JTGS850GL
          Forum Guru
          Past Site Supporter
          • Aug 2013
          • 9735
          • GA

          #5
          If you need one I have many good used diaphragms with slides. PM if you're interested.
          http://img633.imageshack.us/img633/811/douMvs.jpg
          1980 GS1000GT (Daily rider with a 1983 1100G engine)
          1998 Honda ST1100 (Daily long distance rider)
          1982 GS850GLZ (Daily rider when the weather is crap)

          Darn, with so many daily riders it's hard to decide which one to jump on next.;)

          JTGS850GL aka Julius

          GS Resource Greetings

          Comment

          • jdvorchak

            #6
            I don't know where I read this but I tried it and for 3 years, so far, it has held. I repaired a tear in a diaphragm using high temp blue RTV (O'Reilly Auto) and a patch cut from a Harbor Freight 5 mil thick rubber glove. I applied the patch to the "top side" of the diaphragm. Made the patch about 2 or 3 times the size of the tear. I let it cure overnight and reassembled. Worked great and 3 years later still working.

            Just my 2 cents.

            Comment

            • DohcBikes

              #7
              I use ultra black. Be sure to use a nitrile glove. It works.

              Comment

              • jdvorchak

                #8
                Originally posted by DohcBikes
                I use ultra black. Be sure to use a nitrile glove. It works.
                Yeah nitrile is what used. I said rubber because I'm getting old and forgot what it was called. But the cheap 5 mil thick gloves from HF is what I used.

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