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Twinpot Brake upgrade on 78 Skunk

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    Originally posted by salty_monk View Post
    Single = 14mm

    Dual = 5/8" (16mm)

    14mm will give more lever travel (might feel spongey).

    This is the one that I use. They are new, work great, right bore. Work with stock mirrors & importantly they are cheap!

    Good replacement for anyone using stock brakes too.

    http://www.ebay.com/itm/FRONT-BRAKE-...2710c6&vxp=mtr
    Was that brake handle broken and rewelded?

    Comment


      http://motorcycling.speedtv.com/arti...suzuki-gs1000/
      Nice recent article about the introduction & superiority of the 1978 GS1000, & great first photo illustrating in far less space than 1,000 words why lowering your bike is a bad idea if you enjoy taking corners pretty fast!
      '77 GS750 920cc heavily modded
      '97 Kawasaki KDX220R rugged terrain ripper!
      '99 Kawasaki KDX220R​ rebuild in progress
      '79 GS425stock
      PROJECTS:
      '77 Suzuki PE250 woods racer
      '77 GS550 740cc major mods
      '77 GS400 489cc racer build
      '76 Rickman CR1000 GS1000/1100
      '78 GS1000C/1100

      Comment


        I bought that brake lever in the auction link above, thanks for the tip! No, it wasn't broken and rewelded, thatis the gap where there is a pivot & spring related to the adjustable leverage dial on the top of the lever, NICE!

        Notice anything about that GS1000?
        '77 GS750 920cc heavily modded
        '97 Kawasaki KDX220R rugged terrain ripper!
        '99 Kawasaki KDX220R​ rebuild in progress
        '79 GS425stock
        PROJECTS:
        '77 Suzuki PE250 woods racer
        '77 GS550 740cc major mods
        '77 GS400 489cc racer build
        '76 Rickman CR1000 GS1000/1100
        '78 GS1000C/1100

        Comment



          it's got an 1100 alloy swinger, & also just noticed some strange horseshoe brace that must stiffen the swinger??? Notice any cbr&ninja parts???!!!??? Ohlin's or other external reservoir $$$$$ rear shocks also. Nice. GSR member's ride?
          Last edited by Chuck78; 12-04-2012, 09:31 PM.
          '77 GS750 920cc heavily modded
          '97 Kawasaki KDX220R rugged terrain ripper!
          '99 Kawasaki KDX220R​ rebuild in progress
          '79 GS425stock
          PROJECTS:
          '77 Suzuki PE250 woods racer
          '77 GS550 740cc major mods
          '77 GS400 489cc racer build
          '76 Rickman CR1000 GS1000/1100
          '78 GS1000C/1100

          Comment


            Looks familiar, might be IanC? If so the shocks are some Ohlin's copies 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..... - FOR SALE!

            www.parasiticsanalytics.com

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

            Comment


              Still got some bracket sets & a couple of full kits of rotors, calipers etc if anyone wants anything to get ready for spring...
              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


                Hey Salty_Monk,

                I'm definitely interested in this mod, have been for a long time actually as I have also felt the need to "grab a handful" sometimes.

                What you're offering in your last post is the COMPLETE set? Rotors, brakets, bolts, calipers.... meaning the only thing needed is some elbow grease?

                If so, pm me with the price to Atlanta, GA.

                Cheers!

                Comment


                  Can you tell me what the spread is between the two rotors once the spacers are installed?

                  Comment


                    should be around 147mm outside to outside. the hub I just got in the mail is about 104mm wide to the rotor surfaces (calipers don't reach far enough over spoke flanges to give you exact figure), plus 21.5mm offset for each rotor. Actually with the adapters, you are using 17mm rotors plus 5mm adapters, so about 148mm if my hub width guestimation is correct.
                    '77 GS750 920cc heavily modded
                    '97 Kawasaki KDX220R rugged terrain ripper!
                    '99 Kawasaki KDX220R​ rebuild in progress
                    '79 GS425stock
                    PROJECTS:
                    '77 Suzuki PE250 woods racer
                    '77 GS550 740cc major mods
                    '77 GS400 489cc racer build
                    '76 Rickman CR1000 GS1000/1100
                    '78 GS1000C/1100

                    Comment


                      Thanks for the info!

                      Comment


                        Originally posted by Chuck78 View Post
                        should be around 147mm outside to outside. the hub I just got in the mail is about 104mm wide to the rotor surfaces (calipers don't reach far enough over spoke flanges to give you exact figure), plus 21.5mm offset for each rotor. Actually with the adapters, you are using 17mm rotors plus 5mm adapters, so about 148mm if my hub width guestimation is correct.
                        Is 147 mm the outside to outside spacing of the disks for the GS 1000?
                        I did a quick measurement of the spacing between my fork legs and I have less than 140 mm??
                        I'm asking because I'd like to fit a wheel that has 135 mm center to center spacing.
                        Would that fit with the twinpot upgrade?
                        My disks are 300 mm in diameter.
                        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 I can measure for you but not until I get home... In Atlanta right now
                          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


                            I believe the 135 mm center to center spacing won't work in a std GS 1000 fork.
                            The spacing can be reduced to 117 mm with other disks but will it be enough for the twinpot calipers to clear the wheel?
                            What's the inside caliper overhang from the disk center?
                            Ideally it should be less than 40 mm ( to be confirmed).
                            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 Chuck78 View Post
                              should be around 147mm outside to outside. the hub I just got in the mail is about 104mm wide to the rotor surfaces (calipers don't reach far enough over spoke flanges to give you exact figure), plus 21.5mm offset for each rotor. Actually with the adapters, you are using 17mm rotors plus 5mm adapters, so about 148mm if my hub width guestimation is correct.
                              I don't know if we are talking about the same thing but a std GS 1000 has an outside disk spacing of 117 mm.
                              As the CBR disks have the same offset ( 17 mm) as the original disks, the new spacing is 117+10=127 mm due to the 5 mm spacers.
                              SM will you please confirm?
                              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


                                In China this week... Will try to confirm when I get back
                                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

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