82 650E - Alternative/Upgrade brake options?

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  • Guest
    #1

    82 650E - Alternative/Upgrade brake options?

    Hi all,

    I've been rebuilding an '82 650E that's sat for way too long, it's going well but I have a rear brake setup that's giving me issues. After dismantling the caliper, cleaning it, and changing the seals, the caliper will compress but not release when the brake lever is pressed and released. I was told that it was likely dirt in the master cylinder and so I pulled it and cleaned it out, remounted it and ran into similar issues. Since then I've pulled it all out again and done a VERY thorough cleaning/inspection, pulled apart the entire MC (can't remember if I did the full deal last time or not) and I'm ready to reassemble/remount, hopefully it works this time.

    IF this doesn't work, and I have to buy some replacement parts, I was curious about alternate setups that fit/work with our bikes? Aside from bolt holes/clearance issues can newer break setups be used on our bikes? e.g. - there's a 2007 FZR being parted out near me with brakes being offered (mc, lines, caliper pads,), if you could mount it and there was clearance are there issues using something like this? Or are there bikes that are bolt on fits? Or just aftermarket setups that are worth the upgrade?

    Thanks for any insight you guys can provide, just looking at options right now
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    • Nessism
      Forum LongTimer
      GSResource Superstar
      Past Site Supporter
      Super Site Supporter
      • Mar 2006
      • 35774
      • Torrance, CA
      #2
      Did you make sure the tiny little fluid return hole in the master is open? That hole often plugs up and causes to brakes to not release. Also, it's critical that you change the brake lines because they are likely full of crud which will contaminate the system quickly and set you back to the beginning.
      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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        • Guest
          #3
          Originally posted by Nessism
          Did you make sure the tiny little fluid return hole in the master is open? That hole often plugs up and causes to brakes to not release. Also, it's critical that you change the brake lines because they are likely full of crud which will contaminate the system quickly and set you back to the beginning.
          Yes, I made a point to look at that hole, you?re right it?s tiny.

          Also, I put on new lines braided lines front & back

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            • tom203
              Forum Guru
              Past Site Supporter
              • Aug 2010
              • 8925
              • Norway,Maine
              #4
              If you can?t save your existing master cylinder....there?s a few that would work as direct swap

              1981 gs650L

              "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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                • cowboyup3371
                  Forum LongTimer
                  Past Site Supporter
                  • Apr 2010
                  • 13996
                  • In Ohio Now
                  #5
                  Also, check out Salty Monk's upgrade here - https://www.thegsresources.com/_foru...hlight=twinpot
                  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"

                    Comment

                    • Guest
                      #6
                      I cleaned all the parts and remounted them this weekend, but haven't had a chance to properly test them yet, Hopefully soon.

                      Originally posted by cowboyup3371
                      Also, check out Salty Monk's upgrade here - https://www.thegsresources.com/_foru...hlight=twinpot
                      Will do, have it open now

                      Originally posted by tom203
                      If you can?t save your existing master cylinder....there?s a few that would work as direct swap

                      I'll keep those in mind when/if I'm part surfing.

                      Are there other, modern bikes that have swappable systems? (even if you have to fab up a mounting bracket?)

                      Thanks for all the feedback folks!

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