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Final Drive Gear Ratio on Shaft Drive

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    #1

    Final Drive Gear Ratio on Shaft Drive

    I read somewhere that the later GS1100GK touring bikes had a different final drive ratio to earlier GS1100Gs.

    Which part is it that changes the gear ratio? Is it in the rear hub? If I got a rear hub from a GK could I put it straight onto my G? I do a lot of highway driving and could do with a taller gear.

    Greetings
    Richard
    sigpic
    GS1150 EF bought Jun 2015
    GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
    GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
    GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
    Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
    Join the United Kingdom (UK) Suzuki GS Facebook Group here
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    #2
    I believe that it is all of the '83 1100s, not just the GK.

    It's not much of a change, they went from a 3.1 to a 2.9.

    I think your 1100 (not sure what year you have) turns about the same engine speed as my son's 1000G, which would be about 4000 rpm at 70 mph. With the new final drive, that would change to 3740.

    Without making some other changes that Suzuki included with the '83 bikes, you might be shooting yourself in the foot by lowering the engine speed. You might bring the speed down below where it makes enough power to maintain that speed easily. You might have to increase your throttle setting, which will more than offset any savings gained with the lower engine speed.

    If you find an '83 final drive, it is a straight bolt-on.

    .
    sigpic
    mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
    hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
    #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
    #2 son: 1980 GS1000G
    Family Portrait
    Siblings and Spouses
    Mom's first ride
    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
    (Click on my username in the upper-left corner for e-mail info.)

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      #3
      When you say the "final drive"; is that the hub on the rear wheel? Is that where the ratio is altered? Do you know if you tell by looking at them?

      Greetings
      Richard
      sigpic
      GS1150 EF bought Jun 2015
      GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
      GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
      GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
      Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
      Join the United Kingdom (UK) Suzuki GS Facebook Group here

      Comment

        #4
        Yes, final drive attached to the swingarm. You can not tell the difference visually.
        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

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          #5
          OK so I have been experimenting with the one that is off my 1983 GS1100G.

          In order for the part that attaches to the wheel to rotate one single rotation I needed to turn the part that would be attached to the shaft drive 2.9 turns. So it looks like I have the taller geared hub already.

          If I had needed to turn the shaft drive 3.1 turns it would have been the lowered geared hub? This would require more revs to achieve the same number of rotations.

          Is that correct?

          Greetings
          Richard
          sigpic
          GS1150 EF bought Jun 2015
          GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
          GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
          GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
          Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
          Join the United Kingdom (UK) Suzuki GS Facebook Group here

          Comment

            #6
            Yep, that is all correct. That is also the first time you mentioned that you have an '83.
            I mentioned in post #2 that I thought all the '83s had the taller ratio.

            .
            sigpic
            mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
            hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
            #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
            #2 son: 1980 GS1000G
            Family Portrait
            Siblings and Spouses
            Mom's first ride
            Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
            (Click on my username in the upper-left corner for e-mail info.)

            Comment

              #7
              Do you have the Suzuki shop manual? Information on the gearing at various stages and various years is in it. If you don't have it, I would be willing to scan it and e-mail it to you. I can't remember for certain all the particulars, but I think the higher gearing came 84 and after. E-mail sent re: gillinghams

              cg
              Last edited by Charlie G; 06-19-2014, 04:13 PM.
              sigpic
              83 GS1100g
              2006 Triumph Sprint ST 1050

              Ohhhh!........Torque sweet Temptress.........always whispering.... a murmuring Siren

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