Carb needle help.

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  • Markyd
    • Feb 2026

    #1

    Carb needle help.

    Guys, my cafe racer is fitted with 34mm cv carbs the needles are stamped 5C59, does this number relate to a dynojet kit? How can I tell if a dynojet kit has been fitted. Regards and thank you.
  • JTGS850GL
    Forum Guru
    Past Site Supporter
    • Aug 2013
    • 9735
    • GA

    #2
    Are you sure it's not 5D59?
    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

    • eil
      Forum Sage
      • Dec 2012
      • 3062
      • SE Michigan

      #3
      The service manual for your bike has the part numbers and sizes for the stock carb components listed in it. If those match what's in your carbs, then you have the stock parts.

      Also: http://members.dslextreme.com/users/...at_height.html

      (For what it's worth, 5C59 does sound like a stock needle. My understanding is that Dynojet parts don't have part numbers, but the jets will have sizes on them. And their sizes are different from Mikuni sizes, for whatever reason.)
      Charles
      --
      1979 Suzuki GS850G

      Read BassCliff's GSR Greeting and Mega-Welcome!

      Comment

      • rapidray
        Forum Guru
        GSResource Superstar
        • Oct 2006
        • 8195
        • So Cal

        #4
        If you have needles with a part # on them, they are stock. Do your needles have only 1 clip groove in them? I have Factory Pro, adjustable needles if you need a set. 65 bucks shipped to you if you are in the USA.
        Ray.

        Comment

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

          #5
          FWIW, stock Mikuni needles for an 1100G should read 5D58.
          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

          • Markyd

            #6
            Thanks guys love the information, I am in the UK. Anyone have a dynojet kit available (dj3103) for a gs1000/1100 (8v)?

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