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Twinpot Brake upgrade on 78 Skunk

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    When going from a 650GL to a 650G fork for dual discs, will one need to also change the axle and spacers on a GL wheel to fit the G fork? Thank you.

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      How to replace the disk for this bike?

      Comment


        Originally posted by Eric View Post
        When going from a 650GL to a 650G fork for dual discs, will one need to also change the axle and spacers on a GL wheel to fit the G fork? Thank you.
        If you use the original triple tree then in theory the spacer pack and axle should stay the same...

        In practice most are interchangeable apart from there is a different in the 35mm fork leg axle as opposed to the 37mm fork leg axle. Most of the triple trees set the forks at the same width. Anything with a 16" front wheel or a 40mm fork (GK) is different.
        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


          Thanks- Im going with the G triple to keep the rake reasonable. Ill measure stuff up when I have parts. Pretty sure the leg ctc is narrower, but not sure if the axle mounting faces are the same width. I guess Ill find out!

          Comment


            Be interesting to see what you find out. I've not directly compared a G to an L as far as width from memory.
            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


              Set of 83 forks have arrived, pair of calipers from 01 Concours arrived, rotors for a CBR600F3 arrved, some various miscellany and I can swap out the front end on this '81 gs1100e for twin pots.

              Stainless steel lines I just put on already made a noticeable improvement over the (no exaggeration) 41 year old brake lines (yep, had the original lines manufacture date 01/81 still legible).
              Last edited by JacobB5; 05-28-2022, 09:16 PM.
              2007 Kawasaki Vulcan 1600 (original owner)
              1981 Suzuki GS1100 EX (bought 2019)

              Comment


                I wanted to bump this thread as a couple of people have asked me about it. I do have a limited number of bracket & spacer kits left (all powdercoated black as normal) but I likely won't be getting any more following this batch, not so much demand any more.....

                I may have a set or two of rotors somewhere & a Master cylinder or two that would work well with either of the caliper types that work (Ninja/Concourse or EX650 / SV650 / DL650)
                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


                  Originally posted by salty_monk View Post
                  I wanted to bump this thread as a couple of people have asked me about it. I do have a limited number of bracket & spacer kits left (all powdercoated black as normal) but I likely won't be getting any more following this batch, not so much demand any more.....

                  I may have a set or two of rotors somewhere & a Master cylinder or two that would work well with either of the caliper types that work (Ninja/Concourse or EX650 / SV650 / DL650)
                  Good idea, I've given your email address to a couple of guys who have since gotten hold of you.
                  1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
                  New project 1979 GS1000S
                  Recently sold 1979 Honda CBX1000

                  Comment


                    Hi Dan,
                    I'm looking into the purchase of one of your front brake upgrade kits for my GS 1000 ST.
                    A couple of questions:
                    Do the SV 650 calipers work with the kit and if so what model year?
                    Does the kit work with the OEM slotted disks of the 1980 GS 1000?
                    Will you please send me a quote including shipment to France post code 47330?
                    Thanks
                    John
                    sigpicJohn Kat
                    My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                    GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                    Comment


                      John you'll have to swap to the CBR disks or someone used a set of Valkyrie ones back in the thread somewhere if you want something a bit more classic looking.

                      The SV650/DL650/EX650 all used the same caliper. The Kawasaki ones are the newest I think - from about 2009 to 2016. I think SV is 99 to 06 and DL is 2004-2011.

                      You can use the very newest EX650 ones I think (untested) but they use an 8mm bolt and are nissin not Tokico. I bought a set to try and was going to drill out the threads and re-tap to M10 fine. There is plenty of meat to do that. I still have them in a box somewhere....

                      My guess is about $125 to get them to you all in.
                      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


                        Great Dan!
                        I will place an order asap.
                        Will Paypal be OK? If so please send me the address. Mine will be included on Paypal.
                        Thanks
                        John
                        sigpicJohn Kat
                        My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                        GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                        Comment


                          I have PM'd you John. Yes Paypal works.

                          Dan
                          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


                            My GS 1000 ST is now fitted with Salty Monk's conversion kit.
                            I used CBR 900 92-93 disks with SV 650 04 ? calipers.
                            It all came together very nicely and the weight saving is substantial!
                            The total weight came down by 1340 gr including the brackets in the kit.
                            I believe the kit looks fantastic with the larger disk better filling the 19" front wheel.

                            Thanks Dan!
                            Attached Files
                            sigpicJohn Kat
                            My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                            GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                            Comment


                              And another picture IMG_3592.jpg
                              sigpicJohn Kat
                              My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                              GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                              Comment


                                Originally posted by John Kat View Post
                                My GS 1000 ST is now fitted with Salty Monk's conversion kit.
                                I used CBR 900 92-93 disks with SV 650 04 ? calipers.
                                It all came together very nicely and the weight saving is substantial!
                                The total weight came down by 1340 gr including the brackets in the kit.
                                I believe the kit looks fantastic with the larger disk better filling the 19" front wheel.

                                Thanks Dan!

                                I fitted them to my SN as well, they work well and look good doing it.
                                1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
                                New project 1979 GS1000S
                                Recently sold 1979 Honda CBX1000

                                Comment

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