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    #1

    GS1000 fork caps query

    Was the GS1000 ever sold in the US with pre-load adjustable fork caps?

    My original intention was to use the GS850 ones but Suzuki cunningly made them a different thread pitch, for some oddball reason.

    So, what I need is a pair of M30x1 pre-load adjusters, either from a GS1000 or something else that uses that size.

    I've ended up with a spare pair of air-adjuster caps, so if necessary I can fill them and tap them for an adjuster bolt, but I'd rather have something that's already done and dusted and have no worries about strength or leakage.
    ---- Dave
    79 GS850N - Might be a trike soon.
    80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
    79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
    92 XJ900F - Fairly Stock, for now.

    Only a dog knows why a motorcyclist sticks his head out of a car window
    Tags: None
    #2
    Not in the US
    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

    Comment

      #3
      Originally posted by Big T View Post
      Not in the US
      I suspected so, thanks.
      The 37mm forks lasted a while, but not long enough for there to be a back catalogue of useful bits from various markets to mix'n match.
      I've probably gone as far as I can with this setup - the air suspension worked well, but continally topping it up was a pain, so the tubes now host a pair of Wilbers Promoto progressive springs originally intended for a GS1100E, and while they will probably work well, I'd like to have the option of adjusting preload easily.
      I'd like to find that, for example, the GS1100 was sold in Europe with preload adjusters, but likely not.
      ---- Dave
      79 GS850N - Might be a trike soon.
      80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
      79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
      92 XJ900F - Fairly Stock, for now.

      Only a dog knows why a motorcyclist sticks his head out of a car window

      Comment

        #4
        How often do you plan on having to adjust the preload?

        I would think that no more than an hour of testing when you assemble the forks and put them on will get you to the correct preload, then there should be no need to adjust from there.

        .
        sigpic
        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
        Family Portrait
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        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
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        Comment

          #5
          Originally posted by Steve View Post
          How often do you plan on having to adjust the preload?

          I would think that no more than an hour of testing when you assemble the forks and put them on will get you to the correct preload, then there should be no need to adjust from there.

          .
          I won't be adjusting it a lot, but it's a bit irksome that I have a set of perfectly good adjusters that won't fit.
          In use, I hardly ever bothered re-setting them, but it's nice to have the option.
          ---- Dave
          79 GS850N - Might be a trike soon.
          80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
          79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
          92 XJ900F - Fairly Stock, for now.

          Only a dog knows why a motorcyclist sticks his head out of a car window

          Comment

            #6
            Steve's right, preload is pretty much a "set and forget" adjustment for 99% of street riders.
            Measure sag, cut new spacers to get it to the correct value and never mess with it again.
            '20 Ducati Multistrada 1260S, '93 Ducati 750SS, '01 SV650S, '07 DL650, '01 DR-Z400S, '80 GS1000S, '85 RZ350

            Comment

              #7
              GS1100E's are same diameter forks and have adjusters. Not sure about the thread pitch.
              Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
              Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
              Work in progress: 78 GS1000, unknown year GS1100ES

              Comment

                #8
                Originally posted by limeex2 View Post
                GS1100E's are same diameter forks and have adjusters. Not sure about the thread pitch.
                Useful information, thanks.
                Somewhat appropriate that the springs I bought are for an 1100E.
                Now to find someone with an 1100E who doesn't mind taking a cap off to measure it.

                <edit>
                Just re-measured the old 850 pre-load caps and they're a different diameter - the threads are the same as the 1000, at 1mm pitch.
                So, I was slightly mis-recalling. Not a different thread, but fatter. The 850 thread is 31.7mm major diameter, whereas the 1000 caps are 30mm.
                31.7mm major diameter doesn't seem to correspond with a standard metric fine thread, so might be an oddball one that Suzuki chose quite deliberately for some reason.
                Anyway, if the GS1100 caps are 30mm x 1 that will do.
                Last edited by Grimly; 01-28-2020, 05:43 PM.
                ---- Dave
                79 GS850N - Might be a trike soon.
                80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
                79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
                92 XJ900F - Fairly Stock, for now.

                Only a dog knows why a motorcyclist sticks his head out of a car window

                Comment

                  #9
                  The 1100 preload adjusters don't fit the 1000 for legs
                  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.....

                  www.parasiticsanalytics.com

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

                  Comment

                    #10
                    Originally posted by salty_monk View Post
                    The 1100 preload adjusters don't fit the 1000 for legs
                    Thanks for that. I'd not be surprised to find they're the same thread as the 850 Euro legs.
                    No matter, I have another method underway.
                    ---- Dave
                    79 GS850N - Might be a trike soon.
                    80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
                    79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
                    92 XJ900F - Fairly Stock, for now.

                    Only a dog knows why a motorcyclist sticks his head out of a car window

                    Comment

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