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    Yeah that's what I would've thought too... although interestingly enough there was some debate I found via Google search that indicated the larger hole was to increase the lift hence why people drilled them out...

    This is one reason I haven't actually bitten the bullet and drilled mine yet...
    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


      I'm going to be looking into that soon Pete. Definitely going to try the shortened springs.


      Good news

      I have some parts heading this way from Adidasguy

      Rotor
      Coils, plugs
      speedo
      tach
      chain guard (custom made by him)
      rear plastic covers
      Foot pegs
      rear reflectors
      shims
      grommets.
      Stephen.
      1981 GSX540L "Frankintwin"
      1989 GS500E Resto-mod .

      400 mod thread
      Photo's 1

      Photos 2

      Gs500 build thread
      GS twin wiki

      Comment


        Good old Adidas...... I've gotten my share of parts from him as well.

        Sorry for the mini jack Stephen. But Pete - I have some GS450 carbs laying around if you want them. Or even just the slides if you want to experiment with them. Just cover shipping.

        Comment


          Stephen... I'm now running 150 mains and so far so good, should be getting a nice ride in tomorrow to confirm though.

          Rich, that may come in handy actually, although I have an offer here of some slides pending determining if they're the same as mine though.

          I've still yet to pull the slides again and measure the vacuum hole...
          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


            Originally posted by pete View Post
            Stephen... I'm now running 150 mains and so far so good, should be getting a nice ride in tomorrow to confirm though.

            Rich, that may come in handy actually, although I have an offer here of some slides pending determining if they're the same as mine though.

            I've still yet to pull the slides again and measure the vacuum hole...
            You made me go look :P
            2.90mm or 0.115"
            Stephen.
            1981 GSX540L "Frankintwin"
            1989 GS500E Resto-mod .

            400 mod thread
            Photo's 1

            Photos 2

            Gs500 build thread
            GS twin wiki

            Comment


              Hahaha... I will have to go measure mine this week... and after today's awesome riding with the 150 mains I reckon I should do the drilling 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


                Originally posted by pete View Post
                Hahaha... I will have to go measure mine this week... and after today's awesome riding with the 150 mains I reckon I should do the drilling too...

                Any difference with top end pull with the 150's?
                Stephen.
                1981 GSX540L "Frankintwin"
                1989 GS500E Resto-mod .

                400 mod thread
                Photo's 1

                Photos 2

                Gs500 build thread
                GS twin wiki

                Comment


                  Mate it's awesome... last time I was out on some good roads, I hit a certain speed and that was that... no amount of crouching behind the fly screen would improve it.

                  On Saturday, no crouching and accelerating in 5th gear, I easily passed that speed and felt she had a reasonable amount more to go.

                  I'm confident I can hit the ton if I so desire now

                  Of course I would only do that on a private road in controlled circumstances right?
                  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


                    Maybe step it up another notch to see if there is any more. How do the plugs look on a wot plug chop ?
                    Stephen.
                    1981 GSX540L "Frankintwin"
                    1989 GS500E Resto-mod .

                    400 mod thread
                    Photo's 1

                    Photos 2

                    Gs500 build thread
                    GS twin wiki

                    Comment


                      I haven't done plug chops yet as the situation wasn't suitable on Saturday, but I did some tests by holding it at WOT and then letting the throttle close a little to see if she would pick up a little or not, and while it didn't seem to do so, it felt like it wanted to, so given that I don't want to get any bigger on the mains.

                      It's still doing some popping on decel as well so I think I need to richen the mixture screws another quarter turn.

                      I should be doing a dyno run with the Kat guys on May 18 which will show me how good/bad it really is...
                      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


                        Yeah do it. Best way to find out.


                        Today I got a bit done and had a little bit of fun with the ignition.
                        Installed a dyna 200 rev limiter, put the rotor in a drill and spun it up. The rev limiter worked :-p. It would only spark so fast once it maxed out.

                        Also pulled the flywheel off to replace it with the new one comes. 14mm x 1.5 bolt works well.




                        Last edited by Mekanix; 04-24-2013, 11:38 AM.
                        Stephen.
                        1981 GSX540L "Frankintwin"
                        1989 GS500E Resto-mod .

                        400 mod thread
                        Photo's 1

                        Photos 2

                        Gs500 build thread
                        GS twin wiki

                        Comment


                          Cool, good to see some electrickery going in there
                          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


                            I've added a few things. 4 way flashers, gear position, volt meter, led everything, usb outlet, 12v outlet, heated grips and seat soon.
                            Stephen.
                            1981 GSX540L "Frankintwin"
                            1989 GS500E Resto-mod .

                            400 mod thread
                            Photo's 1

                            Photos 2

                            Gs500 build thread
                            GS twin wiki

                            Comment


                              That's right, forgotten you had already done some of that stuff... I'm losing track of all the threads I'm following...

                              How long 'til the first test ride? Gotta be getting close surely...
                              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


                                All the parts from adidasguy arrive tomorrow. Still have to prep and seal the tank. So 2 weeks maybe.
                                Stephen.
                                1981 GSX540L "Frankintwin"
                                1989 GS500E Resto-mod .

                                400 mod thread
                                Photo's 1

                                Photos 2

                                Gs500 build thread
                                GS twin wiki

                                Comment

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