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1985 Kawasaki GPz750 needs refresh

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    #31
    A KZ750 airbox does fit the GPz. EPA connections match up also.

    ZoONuXn.jpg
    1982 GS1100G-
    1990 GSX750/1127
    1987 Honda CBR600F Hurricane
    1985 Kawasaki GPz750

    Comment


      #32
      Got the starter clutch out, utube videos were a big help.
      The case is cracked, seems to be a common failure.
      Waiting for gaskets now.

      CQZnuos.jpg
      1982 GS1100G-
      1990 GSX750/1127
      1987 Honda CBR600F Hurricane
      1985 Kawasaki GPz750

      Comment


        #33
        Finally getting some rides in after waiting weeks for different parts.
        More to do, I bought clip-on handlebars from an 83 GPz because they're lower and more forward, I have long arms.
        Need new tires but I'll wait until next season, plus some carb adjustments, power drops off at 8,000 RPM.

        7TPVyng.jpg
        1982 GS1100G-
        1990 GSX750/1127
        1987 Honda CBR600F Hurricane
        1985 Kawasaki GPz750

        Comment


          #34
          Had a hard time with the rear brake system. Eventually replaced everything except the pedal.
          The Kawasaki rear master cylinder seems to be very much the same for many of their bikes, with slight differences.
          I did rear brake jobs on 3 of my bikes. They do get taken for granted.
          1982 GS1100G-
          1990 GSX750/1127
          1987 Honda CBR600F Hurricane
          1985 Kawasaki GPz750

          Comment


            #35
            Originally posted by Buffalo Bill View Post
            ...power drops off at 8,000 RPM.
            That's where the fun starts!
            1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

            2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

            Comment


              #36
              Rob, you're telling your and your bikes age, with some of these newer bikes 8K rpm is just half throttle.
              1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

              Comment


                #37
                LMAO. Z1 redline is maybe 8K on a good day, and Rob also had a Harley, where redline is just over 6K. I think dementia is setting in.
                "Thought he, it is a wicked world in all meridians; I'll die a pagan."
                ~Herman Melville

                2016 1200 Superlow
                1982 CB900f

                Comment


                  #38
                  Originally posted by Buffalo Bill View Post
                  Finally getting some rides in after waiting weeks for different parts.
                  More to do, I bought clip-on handlebars from an 83 GPz because they're lower and more forward, I have long arms.
                  Need new tires but I'll wait until next season, plus some carb adjustments, power drops off at 8,000 RPM.

                  7TPVyng.jpg
                  Such truly lovely bikes. I forget at times how pretty they are.
                  "Thought he, it is a wicked world in all meridians; I'll die a pagan."
                  ~Herman Melville

                  2016 1200 Superlow
                  1982 CB900f

                  Comment


                    #39
                    Originally posted by GS1150Pilot View Post
                    LMAO. Z1 redline is maybe 8K on a good day, and Rob also had a Harley, where redline is just over 6K. I think dementia is setting in.
                    Z1 redline was 9k, and it made good power past that any day of the week.

                    The Sporty red line may have been 6k, but there was virtually never any benefit after 5k.

                    Wait, what were we talking about?
                    1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

                    2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

                    Comment


                      #40
                      Oh bummer, sounds like rod knock and loud.
                      1982 GS1100G-
                      1990 GSX750/1127
                      1987 Honda CBR600F Hurricane
                      1985 Kawasaki GPz750

                      Comment


                        #41
                        Originally posted by Buffalo Bill View Post
                        Oh bummer, sounds like rod knock and loud.
                        Hum. The 550's are known for rod knock, but not the 650/750. Are you sure? The clutch basket is known to develop lash, fix as shown in my build thread (installing new rubber cush bumpers). Also, the secondary shaft drive sprocket has rubber bushing that develop lash. Hope the problem isn't truly rod knock, because the fix for that involves splitting the cases.
                        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


                          #42
                          Yikes! Figured it meant splitting the case.
                          The sound is a really loud knock, and seems to be coming from #2 cylinder in the case.
                          I will have to open it up for a look see. With winter coming on my garage will be too cold to work, even with a heater.

                          The reason this bike looks in fine shape on the outside, must be because it never ran very well.

                          Another weird thing is there is a center detente in the steering race, like it was meant to help steer the bike straight ahead?? Really throws off my confidence in corners.
                          I already ordered replacement tapered roller bearings.
                          1982 GS1100G-
                          1990 GSX750/1127
                          1987 Honda CBR600F Hurricane
                          1985 Kawasaki GPz750

                          Comment


                            #43
                            Originally posted by Buffalo Bill View Post
                            ...With winter coming on my garage will be too cold to work, even with a heater.
                            That's a shame. But I happen to know that most Kawasakis come from the factory house broken. If you think she might have an accident, spread a few newspapers. And don't cry over spilled milk.
                            1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

                            2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

                            Comment


                              #44
                              I'm really growing to appreciate Suzuki motorcycles.
                              1982 GS1100G-
                              1990 GSX750/1127
                              1987 Honda CBR600F Hurricane
                              1985 Kawasaki GPz750

                              Comment


                                #45
                                That's why I's always liked roller bearings on crankshafts.
                                1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

                                Comment

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