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Replacement of front master cylinder??

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    #1

    Replacement of front master cylinder??

    After fighting, disassembling and reassembling the front master cylinder 3 times to get it to work.. I'm tapping out. Im just going to replace it altogether.. Can anyone recommend and perhaps shoot me a link for a decent quality but reasonably priced master cylinder for a 78 gs550 with a brake switch?
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    #2
    Not 100% sure of the size of your original, but assuming it is single disc and 14mm, this will do:

    Kawasaki Brake Master Cylinder KZ200 KZ400 KZ550 KZ650 KZ700 14mm Bore Piston | eBay
    https://www.ebay.com/itm/Kawasaki-Brake-Master-Cylinder-KZ200-KZ400-KZ550-KZ650-KZ700-14mm-Bore-Piston/183149968564?hash=item2aa496bcb4:g:~koAAOSwDVtaYSUN&vxp=mtr
    Front Brake Master Cylinder for Kawasaki KZ Series KZ900 KZ1000 KZ1100 KZ1300 Premium Quality, Direct Stock Replacement,Easy Installation Comes With Installed Banjo Bolts and Brake Light Switch Brake Master Cylinder with Front Mount Outlet Facing Front Tire Specification: Aftermarket 100% Brand New Material: Aluminum Color: Full Black Piston Bore: 14mm Banjo Bolt: 10x1.25mm Mirror Mount Hole: 10mm, Clockwise Thread Handlebar Mount Size : 7/8 or 22mm Package Includes: 1x Complete Brake Master Cylinder Assembly with Clamp No Instructions and Easy to Install Fitment: Fit on 7/8" Handlebar ONLY. Kawasaki KZ Series KZ200 KZ400 KZ550 KZ650 KZ700 KZ1000 KZ1100 KZ1300.




    It has a brake switch included (you will need to re-do the wiring / connectors though).
    Current:
    Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

    Past:
    VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
    And a bunch of other crap Yamahas....

    Comment

      #3
      Yep, any single brake UJM type bike will basically do it. They all seem to be 14mm. Kawasaki KLR, Ninja 250 etc. Far more cost effective and less hassle than rebuilding to buy one being parted on Ebay
      1980 GS1000G - Sold
      1978 GS1000E - Finished!
      1980 GS550E - Fixed & given to a friend
      1983 GS750ES Special - Sold
      2009 KLR 650 - Sold - gone to TX!
      1982 GS1100G - Rebuilt and finished. - Sold
      2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

      www.parasiticsanalytics.com

      TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

      Comment

        #4
        Originally posted by salty_monk View Post
        Yep, any single brake UJM type bike will basically do it. They all seem to be 14mm. Kawasaki KLR, Ninja 250 etc. Far more cost effective and less hassle than rebuilding to buy one being parted on Ebay
        Agreed, I've got some new universal brake/clutch lever combo for $45 (delivered) through ebay, works a treat. It just doesn't look too original (as the reservoir is separate).

        Loads of styles to choose from.
        #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
        #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
        #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
        #4: 1980 Moto Guzzi V65C – Something to chill

        Comment

          #5
          I would also suggest a used OEM master. I'm afraid to buy a Chinese unit and never be able to find rebuild kit in the future.
          Jordan

          1977 Suzuki GS750 (My first bike)
          2000 Kawasaki ZRX1100
          1973 BMW R75/5

          Comment

            #6
            Originally posted by hannibal View Post
            I would also suggest a used OEM master. I'm afraid to buy a Chinese unit and never be able to find rebuild kit in the future.
            They are cheap enough that you would just junk it and buy a whole new unit. That's really the point.
            Current:
            Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

            Past:
            VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
            And a bunch of other crap Yamahas....

            Comment

              #7
              The one I bought came with a spare piston assembly for a future rebuild, the whole shebang was still cheaper than an OEM MC rebuild kit alone would cost.
              1980 Yamaha XS1100G (Current bike)
              1982 GS450txz (former bike)
              LONG list of previous bikes not listed here.

              I identify as a man but according to the label on a box of Stauffers Baked Lasagne I'm actually a family of four

              Comment

                #8
                Used the chinese models exactly as shown above. Never had any issues.

                Comment

                  #9
                  Yep, I bought a Chinese MC from fleaBay and it came with a spare lever and rebuild kit.


                  Surprisingly nice quality, and worked great.


                  However, the reach to the lever was different than the original, and it drove me bonkers. Eventually I found a source for the little window in the original, rebuilt it with a new OEM kit and a new OEM lever just because, and reinstalled it.
                  1983 GS850G, Cosmos Blue.
                  2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
                  2015 Yamaha FJ-09, Magma Red Power Corrupts...
                  Eat more venison.

                  Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

                  Celeriter equita, converteque saepe.

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                  Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

                  Comment

                    #10
                    I ended up grabbing a aftermarket master cylinder for mine too, the only problem with it was that I had to find a Honda banjo bolt as the thread pitch was different than the Suzuki.

                    Comment

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