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Butterfly Throttle Plate Numbers - Significance?

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    #1

    Butterfly Throttle Plate Numbers - Significance?

    I've searched on the forums for an answer to this one but couldn't find one.

    I am rebuilding a set of carbs for a GS550. Two of the bodies had issues that require me to replace them. The original set had 140 stamped on the brass throttle butterfly plates. The set I picked up to use as replacement bodies have 130 stamped on the plates. I've measured them and see no difference. Can anyone out there in GS knowledgeland tell me if there is a difference?
    GS550T 1981
    GS850G 1983
    GS650G 1982
    GS650G 1982 Under Restoration 😳🏍👍
    Tags: None
    #2
    Do a good bench sync since the butterflies have a different angle. The different number on the butterfly will have a different adjustment on the set screw.
    Get them lined up and you are golden.
    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.

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      #3
      Thanks very much - I appreciate the information!
      GS550T 1981
      GS850G 1983
      GS650G 1982
      GS650G 1982 Under Restoration 😳🏍👍

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