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Master Cylinder Compatibility

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    Master Cylinder Compatibility

    Would a front master cylinder from an 81 GS750 (59600-45130) be okay to replace my 80 GS450's(59600-45080)?

    Thanks in advance

    Brett

    #2
    I don't think you can mix single caliper with dual.
    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
      Ok thanks Chef.

      How about handlebar size, 7/8" or 1"?

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        #4
        GS handlebars are 7/8". 1" is a Harley size, plus some of the modern big metric crusiers have adopted it as well.

        Single disc brake master cylinders are 14 mm, whereas dual disc GS masters are 5/8" which is larger. You can use a 5/8" master on a single disc bike but the hand pressure required to use the brake will increase. One side benefit of the large bore master is the lever will have a firm feel with less sponginess than a 14 mm master.
        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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          #5
          Thanks again ness, gonna to get me a set of daytona bars
          Last edited by Guest; 01-21-2010, 01:15 PM.

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