caliper upgrade

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  • montjuic
    Forum Newbie
    • Aug 2016
    • 15
    • manchester

    #1

    caliper upgrade

    I am thinking of upgrading the brakes on my 1980 gsx1100et, are there any calipers which fit straight on what can be recommended, thanks.
  • Nessism
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    Super Site Supporter
    • Mar 2006
    • 35792
    • Torrance, CA

    #2
    Nothing that will fit straight on. A member here, Salty_Monk, sells some nifty conversion brackets though. Try the search function there are literally dozens of threads from happy customers.
    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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    • Big T
      Forum LongTimer
      Past Site Supporter
      Super Site Supporter
      • Mar 2005
      • 12401
      • West Slope, OR

      #3
      EDIT 1/1/2023 - Yes I have a few sets of brackets/spacers/hub spacers left - Price is $104 shipped Priority in the USA. Most other countries tend to be around $125-$130 shipped 1st class package. Newest brackets also allow the new Ninja EX650 Tokico calipers to be fitted as well as SV650 & DL650. Just some pics of the
      1978 GS 1000 (since new)
      1979 GS 1000 (The Fridge, superbike replica project)
      1978 GS 1000 (parts)
      1981 GS 850 (anyone want a project?)
      1981 GPZ 550 (backroad screamer)
      1970 450 Mk IIID (THUMP!)
      2007 DRz 400S
      1999 ATK 490ES
      1994 DR 350SES

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      • prichmon
        Forum Mentor
        • Mar 2017
        • 161
        • 1 hour east of Cinci, Ohio

        #4
        I read that the Brembo F08 calipers could bolt directly on a 1000. The F08 has twin 38mm pistons. Am I misguided? AFAIK the caliper bolt patterns are the same between 79- and 80+
        The GS toys:
        79 GS1000L 1st bike sold many moons ago...
        78 GS550
        81 GS650G The son's
        82 GS650GL parts bike
        85 GS700ES in progress
        85 gs700E parts bike
        82 GS1000GL in pieces
        80 GS1100L in progress

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        • Grimly
          Forum Guru
          Past Site Supporter
          Super Site Supporter
          • Sep 2012
          • 5771
          • Ireland

          #5
          Originally posted by prichmon
          I read that the Brembo F08 calipers could bolt directly on a 1000. The F08 has twin 38mm pistons. Am I misguided? AFAIK the caliper bolt patterns are the same between 79- and 80+
          They'd need to be sliders, as there's not enough room for opposed piston types. At least, none that have been found so far.
          Dave
          '79 GS850GN '80 GS850GT
          Only a dog knows why a motorcyclist sticks his head out of a car window

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          • salty_monk
            Forum LongTimer
            GSResource Superstar
            Past Site Supporter
            Super Site Supporter
            • Oct 2006
            • 14002
            • London, UK to Redondo Beach, California

            #6
            Looking at pictures that F08 looks like it would be too thick too...

            I haven't found a good solution for an opposed piston yet. I suspect the only models with enough distance between the fork legs would be the 83+ 750/700 models with the 16" wheel. The GS1150 has opposed pistons & I suspect that it is the same front end. The 1150 Hub is much wider to push the rotors out.

            The GK models with the larger diameter legs might also have more distance.. I've not measured one to find out.
            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/

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            • Grimly
              Forum Guru
              Past Site Supporter
              Super Site Supporter
              • Sep 2012
              • 5771
              • Ireland

              #7
              On a related note...
              The XJ9 legs are 37mm and would fit straight on to the GS. The XJ uses opposed piston calipers.
              If I ever bend the front badly enough, I'll look for an XJ front end. I honestly can't say I've had any reservations about the XJ handling and braking.
              Dave
              '79 GS850GN '80 GS850GT
              Only a dog knows why a motorcyclist sticks his head out of a car window

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