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How to ruin a perfectly good stock frame

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    How to ruin a perfectly good stock frame

    Find some tubing:

    Stare at the frame for a while:

    Cut it randomly:

    Change something:

    Try to figure out how to put it back together:

    #2
    I like my frames straight:

    Decided to go with a Harley style neck and a single downtube:

    Cut off paper thin stock backbone, weld on new heavy wall backbone, build seatstays, clamp on your favorite tank and call it a night:


    Comment


      #3
      this is getting interesting very quickly

      Comment


        #4
        That's looking clean for sure... which I know is your main aim

        Bit distracted at the moment watching a certain Mr Stoner spin it up sideways out of the corners at Catalunya... man I wish I could ride like that!
        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
          Your craftsmanship and vision looks good to me, but the execution from a structural standpoint looks very scary. I'd pull out those main tubes and get some at least 1/2" diameter larger (maybe more).
          Last edited by Nessism; 06-05-2011, 04:44 PM.
          Ed

          To measure is to know.

          Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

          Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

          Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

          KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

          Comment


            #6
            The tubing is much much heavier wall thickness than stock. It's also bigger than the tubing that makes up my current frame that I've been riding. I appreciate the concern but I assure you that when finished this frame will be much stronger than a stock gs frame.

            Comment


              #7
              Originally posted by mlc216 View Post
              The tubing is much much heavier wall thickness than stock. It's also bigger than the tubing that makes up my current frame that I've been riding. I appreciate the concern but I assure you that when finished this frame will be much stronger than a stock gs frame.
              I seriously doubt that. Triangulation and outside diameter of the tube is what gives the frame it's strength and stiffness. By using those skinny tubes, even though they may be thick, and getting rid of the double down tubes and triangulation in the head tube area, that frame of yours is going to be a noodle compared to stock.
              Ed

              To measure is to know.

              Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

              Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

              Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

              KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

              Comment


                #8
                Gonna weld in any gussets at the critical joint areas???
                MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                Comment


                  #9
                  Originally posted by Nessism View Post
                  I seriously doubt that. Triangulation and outside diameter of the tube is what gives the frame it's strength and stiffness. By using those skinny tubes, even though they may be thick, and getting rid of the double down tubes and triangulation in the head tube area, that frame of yours is going to be a noodle compared to stock.
                  You're right it will be a total noodle just like every stock Harley frame from the 1930's on. I guess I'll just take my engineering degree back to the university and tell them it's worthless.

                  But seriously I'm not building a sport bike. It won't be built to dive into corners at 100mph. I'm sorry for bringing this trash to your board and offending you and your 17 suzukis.

                  If anyone else wants to see how it turns out let me know and I'll think about posting more pictures.

                  Comment


                    #10
                    And btw the tubing for the backbone, downtube, and backbone support are the same OD as the original backbone. The rest of the hardtail is 1" DOM tubing.

                    Comment


                      #11
                      i say GO FOR IT mate, its looking good and reckon it will look great when finished. keep it up and get the pics coming in as you progress
                      1978 GS1085.

                      Just remember, an opinion without 3.14 is just an onion!

                      Comment


                        #12
                        Originally posted by mlc216 View Post
                        You're right it will be a total noodle just like every stock Harley frame from the 1930's on. I guess I'll just take my engineering degree back to the university and tell them it's worthless.

                        But seriously I'm not building a sport bike. It won't be built to dive into corners at 100mph. I'm sorry for bringing this trash to your board and offending you and your 17 suzukis.

                        If anyone else wants to see how it turns out let me know and I'll think about posting more pictures.

                        Dude, I don't really care what you do but your claim "... but I assure you that when finished this frame will be much stronger than a stock gs frame" is BS.
                        Ed

                        To measure is to know.

                        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                        Comment


                          #13
                          Strength and stiffness are different things. Hardtails are built to flex, otherwise they would break from fatigue stresses over years of riding.

                          My frame may flex more, but the stock frame would pop first in a testing facility as far as overall STRENGTH goes.

                          Comment


                            #14

                            No more swingarm. Chainstays are in...

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                              #15

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