Master Cylinder Brake & bleeding problem

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  • tas850g
    Forum Sage
    • Jun 2008
    • 1678
    • Jaffrey, NH

    #16
    I'm sorry but I'm gonna kinda hijack the thread....which way does the cup go on the piston??? Does it go on so that the "fold" in the rubber cup is facing toward the brake lever? Or so the fold is facing the spring?? If you understand what I mean. I'll take pics if needed.
    1979 GS850G
    2004 SV650N track bike
    2005 TT-R125 pit bike
    LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

    http://s327.photobucket.com/albums/k443/tas850g/

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    • djscoutmaster

      #17
      Here are the peices that came out. there is a seal piece in the middle that look to stay stationary as the piston moves. not sure if that is a giveaway.

      due they look like they are in good enough shape to just re-install?
      Last edited by Guest; 06-22-2011, 07:49 PM. Reason: addittions

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      • Nessism
        Forum LongTimer
        GSResource Superstar
        Past Site Supporter
        Super Site Supporter
        • Mar 2006
        • 35793
        • Torrance, CA

        #18
        Those parts are the same as from the 1980 1000 bikes. That master kit is quite expensive compared to some of the other kits for some reason. Hopefully you can return the one you bought and get the right one.
        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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        • djscoutmaster

          #19
          kits

          i have not got the rebuild kit in the mail yet so ill just return to sender and get my money back. (bikeBandit)

          where do you recomend i get a rebuild kit? all the ones on Z1 seem universal. should i get it from bikeBandit?

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          • cowboyup3371
            Forum LongTimer
            Past Site Supporter
            • Apr 2010
            • 13998
            • In Ohio Now

            #20
            I'm not sure where you are located (might want to throw that in your profile) but why not talk to your local shop? That way you can resolve issues faster?
            Cowboy Up or Quit. - Run Free Lou and Rest in Peace

            1981 GS550T - My First
            1981 GS550L - My Eldest Daughter's - Now Sold
            2007 GSF1250SA Bandit - My touring bike

            Sit tall in the saddle Hold your head up high
            Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
            and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

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            • ChicagoBob

              #21
              You know, you might consider just buying a new master cylinder, since you aren't sure you have a rebuildable core, or where it came from. GS units are available on eBay, and nice brand-new ones are available from Mike's XS in different configurations and with different bore sizes. Here's the one I'm using on my 550. Mirror mount is the same as the Suzuki (not the Yamaha reverse 8mm), though I've plugged mine because I use a bar-end mirror. You'd probably want one with a larger bore for your dual front disks, but these work well and are new and trouble-free.

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              • Guest

                #22
                You have to bleen out the M/C resevoir. Without the brake lever on use a phillips screwdriver or something similar and push the piston in the whole way when bleeding. There is always a stubborn air pocket there and the lever does not push the piston in the whole way.

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