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SV650 Brakes on a GS450

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    SV650 Brakes on a GS450

    Hello!
    I just saw a 1986 GS450 with the left caliper and disk installed from a SV650!
    They just bolted right in no problem! im wondering if this might work on my 1980 GS450, and if it may be possible to use the rear brakes of an sv650 to upgrade my drum brakes to disk brakes? any insight would be great!
    Thanks,
    Dennis

    #2
    keep in mind if you want rear disc you will most likely need a new swing arm with disc brake mounts svs are monoshock rear so that will require some creative fabrication. if you want disc rears youe are better off looking within the gs series

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      #3
      Thanks! Which GS series do you think would be appropriate?

      Comment


        #4
        Interesting to know! A 550 swingarm if any would probably be the most likely, but it would need to be measured etc...
        1982 GS450E - The Wee Beastie
        1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

        sigpic

        450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

        Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

        Comment


          #5
          Thanks!
          Im going to start with the front end, ill keep you posted!

          Comment


            #6
            Please do, it's always good to know what fits these as most mod's are only for the bigger bikes...
            1982 GS450E - The Wee Beastie
            1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

            sigpic

            450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

            Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

            Comment


              #7
              ok, I got all the parts.i noticed the banjo fittings are smaller on the Cv65o caliper etc.., so i guess Ill have to use the master cylinder+brake from the SV650 as well. i had hoped just to attachh my steel braided line to the new caliper.
              Ill have to find a suitable brake line for this, becuase the SV650 brake line is meant for two calipers.
              Last edited by Guest; 09-12-2011, 03:12 PM.

              Comment


                #8
                Pretty sure the lines themselves are the same and you'll just need a custom line with the right size bolt on it.
                1982 GS450E - The Wee Beastie
                1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                sigpic

                450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                Comment


                  #9
                  ahh, so I can just get a different sized fitting that would thread into the same steel brake line I have?
                  Last edited by Guest; 09-12-2011, 03:31 PM.

                  Comment


                    #10
                    Yup, measure away and get it from somewhere like this:



                    Or make your own from Earl's plumbing (I think that's the place).

                    That eBay seller has a good reputation on here and I'm thinking that's where I'll get mine from too.
                    1982 GS450E - The Wee Beastie
                    1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                    sigpic

                    450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                    Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                    Comment


                      #11
                      Be very surprised if they are not 10mm standard banj0 fittings... I have a set of those brakes on the shelf I believe.
                      They do use a 12mm wrench on the bolt not a 14mm though...
                      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


                        #12
                        Thanks! It looks like its 10mm, but my 10mm banjo bolt doesn't thread into the caliper. I think the threading is different somehow on the SV650.
                        Do you think there is any advantage of using the Master cylinder from the SV650 or can i just use mine?

                        Comment


                          #13
                          It'd be better to use the SV unit with the SV caliper, newer is usually better. Banjo bolts seemed to change pitch somwhere in the 90's, from 1 to 1.25, or 1.25 to 1.5, I forget. My Katana front end was the same, different thread pitch on the 10mm banjo bolts.

                          Comment


                            #14
                            Originally posted by Curly View Post
                            It'd be better to use the SV unit with the SV caliper, newer is usually better. Banjo bolts seemed to change pitch somwhere in the 90's, from 1 to 1.25, or 1.25 to 1.5, I forget. My Katana front end was the same, different thread pitch on the 10mm banjo bolts.
                            It's from 1 to 1.25.

                            Comment


                              #15
                              I'm going to guess the master cylinder is a slightly smaller piston bore on the SV which I believe means a little more travel but more pressure.

                              Stock is 14mm, I'm guessing the SV may be 13mm...

                              I'd definitely go the SV either way as long as it's in good nick.
                              1982 GS450E - The Wee Beastie
                              1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                              sigpic

                              450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                              Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                              Comment

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