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    Frame bracing, boxing vs tubing.

    Hi again, been a few years since I was last on this forum, still haven't finished my gs but hoping to get there now. So tomorrow I'm starting to brace my frame.
    I've been reading this; https://oldskoolsuzuki.info/archives/315
    And I see it's a 60x20 1mm box steel that's recommended on the B C and E bracing, but what if I can't find that? Can i use steel tube instead? Or make a box with 1mm steel sheet?
    I see both boxing and tubing being used online but I don't know about the pros and cons, I'm sure anything is better than nothing at this point but I wanna do it proper when I'm first gonna do it.

    And if anyone is wondering why I'm doing this I'm fitting a sv1000 front fork and a bandit 1200 rear with öhlins shocks so I think it's for the better.

    #2
    You can fold those box sections out of sheet. No reason why not. look at the plane of the forces. You could also just use a single thicker plate and get most of the same benefit with a lot less hassle (that's what Suzuki do as stock on where they brace the frame)....
    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/

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      #3
      I used a mixture of round and rectangular tubing when I braced & monoshocked my frame. I can say it definitely reduced the "hinged in the middle" feeling of the flexy stock frame. It's never going to be as stiff as say a modern sportbike frame, but is definitely an improvement over stock.

      Bikes:

      1980 GS1000 restomod
      2006 GSXR 750

      Comment


        #4
        I used tube, 16g plate and one piece of tube between the swingarm pivot where I added another engine mount.
        Its a work in progress.
        Marc
        CIMG5567.jpg
        Last edited by kochic; 03-09-2020, 08:42 PM.
        AIR COOLED MONSTERS NEVER DIE
        1978 GS1000C X2
        1978 GS1000E X2
        1979 GS1000S
        1979 gs1000
        1983 gs400e

        Comment


          #5
          these are made with 16g plate.
          Marc
          CIMG5569.jpg
          Last edited by kochic; 03-09-2020, 08:41 PM.
          AIR COOLED MONSTERS NEVER DIE
          1978 GS1000C X2
          1978 GS1000E X2
          1979 GS1000S
          1979 gs1000
          1983 gs400e

          Comment


            #6
            under the tank.
            Marc
            CIMG5529.jpg
            AIR COOLED MONSTERS NEVER DIE
            1978 GS1000C X2
            1978 GS1000E X2
            1979 GS1000S
            1979 gs1000
            1983 gs400e

            Comment


              #7
              another picture.
              Marc
              CIMG5524.jpg
              AIR COOLED MONSTERS NEVER DIE
              1978 GS1000C X2
              1978 GS1000E X2
              1979 GS1000S
              1979 gs1000
              1983 gs400e

              Comment


                #8
                Aluminium engine mount, more than 1lb lighter.
                Sorry for the small pictures, I know how to post bigger pics.
                Marc
                CIMG5591.jpg
                AIR COOLED MONSTERS NEVER DIE
                1978 GS1000C X2
                1978 GS1000E X2
                1979 GS1000S
                1979 gs1000
                1983 gs400e

                Comment


                  #9
                  Thanks for the replies, I think I'll just fold some sheet metal for the box sections B and C and use tubing for the rest.

                  Made the front one today

                  Comment


                    #10
                    Cool thread!
                    Just like to know if any of these bikes were built for racing?
                    Because reducing weight is important for race bikes.
                    Thanks.
                    "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
                    1982 GS1100G- road bike, body, seat and suspension modded
                    1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
                    1987 Honda CBR600F Hurricane; hooligan bike, restored

                    Comment


                      #11
                      Originally posted by Buffalo Bill View Post
                      Cool thread!
                      Just like to know if any of these bikes were built for racing?
                      Because reducing weight is important for race bikes.
                      Thanks.
                      A lot of these modifications were done by Yoshimura on the GS1000 racers of the time.
                      They had powerful engines in a factory (touring) chassis that needed to be stiffened
                      to handle that power.
                      Reducing weight is important, but more of a thing that came later on when
                      technology and knowledge combined to create stiffer and lighter frames.

                      That is the reason manufacturers like Nico Bakker, Egli, Rickman etc were
                      big - they were the pioneers that created lighter and stiffer frames for those
                      engines.

                      The factories picked up on that quickly, copying and improving on those designs.
                      Rijk

                      Top 10 Newbie Mistakes thread

                      CV Carb rebuild tutorial
                      VM Carb rebuild tutorial
                      Bikecliff's website
                      The Stator Papers

                      "The thing about freedom - it's never free"

                      Comment


                        #12
                        I'm hoping the removal of the stock seat and rear of the frame along with aluminium rear swing arm and a lifepo4 battery pluss removal of any unnecessary stuff is gonna negate whatever little weight is put on by this

                        Comment


                          #13
                          Are you building a 750?
                          Marc
                          AIR COOLED MONSTERS NEVER DIE
                          1978 GS1000C X2
                          1978 GS1000E X2
                          1979 GS1000S
                          1979 gs1000
                          1983 gs400e

                          Comment


                            #14
                            Originally posted by kochic View Post
                            Are you building a 750?
                            Marc
                            That's right!

                            Comment


                              #15
                              This was exactly what I need. Homemade easy plate brake!

                              Comment

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