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GSXR front end on Kat 1100

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    #1

    GSXR front end on Kat 1100

    I'm currently upgrading one of my Kats to "racing" spec.
    As such, I decided to graft a complete front end from a 1st gen GSXR 1100.
    Once again the Suzuki magic worked, the fork slips right in with no modification.
    Too bad Suzuki didn't standardize on the stop locks aswell.
    Here's the before ( 19" wheel) and the after (18" wheel).


    sigpicJohn Kat
    My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
    GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020
    Tags: None
    #2
    You are on your way. El G.

    Comment

      #3
      You will get a big step up with the radials, You going to get a 18x4" 1100 rear wheel as well? Run a 160/60-18.


      BTW, the GS antidives will fit on the GSXR forks. I went with cartrige emulators so the antidive is not functional anyway

      Comment

        #4
        Yes, I managed to find the matching rear wheel in 18*4 dimension
        I'm still unsure about the tire dimension as theoretically the maximum size should be a 150?
        The 18" tires are rare and I was wondering if I would not fit the kind of tire that goes on the modern "trail" bikes like the BMW GS 1200 or the Ducati Multistrada?
        The 150/70*18 dimension for a Contitrail Attack BTW develops 2014 mm per rev that compares almost exactly to the 130/90*17 with 2011 mm/rev.
        What do you think?
        sigpicJohn Kat
        My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
        GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

        Comment

          #5
          I have the same front end on my 1980 1100/gsxr/bandit conversion. Ride quality is 100% better. I love it.

          Paul
          80 gs1100 16-v ported & polished, 1 mm oversize intake valves, 1150 carbs w/Dynojet stage 3, plus Bandit/gsxr upgrades

          Comment

            #6
            Aren't the GSX-R anti-dive units electricly activated?
            I had an '87 & the anti-dive actually worked on that bike.
            At least so that I noticed a difference.
            The Three Horsemen
            '85 GS1150ES (Current Income Eater)
            '83 GS1100ES
            ‘77 XLCR

            "Never ride faster than you can see. Besides, it's all in the reflexes."
            Porkchop Express

            Comment

              #7
              Originally posted by Greg B View Post
              Aren't the GSX-R anti-dive units electricly activated?
              I had an '87 & the anti-dive actually worked on that bike.
              At least so that I noticed a difference.
              Yes, they are but I believe Posplayr's remark is to keep the bike looking standard.
              I disconnected the anti-dive on my other Kat as the front brake feedback diminishes quite a bit...
              sigpicJohn Kat
              My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
              GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

              Comment

                #8
                Originally posted by nastyjones View Post
                I have the same front end on my 1980 1100/gsxr/bandit conversion. Ride quality is 100% better. I love it.

                Paul
                No doubt!
                What tires are you using?
                Cross-ply or radial?
                sigpicJohn Kat
                My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                Comment

                  #9
                  Pirellis radials front & back. The Bandit swingarm & gsxr front end lowered the bike & gave me modern suspension & ride. Handling is great!!
                  Here's a pic



                  Paul
                  80 gs1100 16-v ported & polished, 1 mm oversize intake valves, 1150 carbs w/Dynojet stage 3, plus Bandit/gsxr upgrades

                  Comment

                    #10
                    Originally posted by nastyjones View Post
                    Pirellis radials front & back. The Bandit swingarm & gsxr front end lowered the bike & gave me modern suspension & ride. Handling is great!!
                    Here's a pic



                    Paul
                    Very nice combination!
                    It looks like you have 17" wheels?
                    sigpicJohn Kat
                    My bikes: CB 77, GS 1000 ST Cafe Racer with GSXR 1052 engine, GS 1000 ST, XR 41 Replica with GS 1085 engine,
                    GS 1100 SZ Katana with GS 1135 EFF engine, KTM Superduke 1290 R 2020

                    Comment

                      #11
                      Yep, 17's helped with the lowering. If I enter a driveway aggressively, I sometime get a minor scrape so I try to be careful.
                      80 gs1100 16-v ported & polished, 1 mm oversize intake valves, 1150 carbs w/Dynojet stage 3, plus Bandit/gsxr upgrades

                      Comment

                        #12
                        Originally posted by John Kat View Post
                        Very nice combination!
                        It looks like you have 17" wheels?
                        The 18" 3 spoke wheels came on the 88 GSXR 1100 only. The front appears to be 18" (see first generation rotors), and likely the rear also.

                        Comment

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