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GS1100EZ vs GS1150 Fork Lengths?

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    #1

    GS1100EZ vs GS1150 Fork Lengths?

    I swapped out the forks and trees from a GS1150 (1984) and put them on my GS1100EZ (1982), but I never actually measured the lengths of the forks. Does anyone happen to know how much difference there is in the lengths... if any? I'm just curious.
    Thanks!
    1982 GS1100E "Jolene"
    Tags: None
    #2
    I can tell you that the 83 - 750 (also 16" wheel) has forks that are approx 2.5-3" longer. All from memory (and from a long time ago when I built my 750 so I could be making all this up!) but about 35" instead of 32" rings a bell... something like that anyway!

    They are also wider. The 1150 especially so. It's 16" wheel has a hub that is wider & from memory the brake rotors mount .75" further outboard (each side) compared to hub centre.
    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold
    2009 TE610 - Dual Sporting around dreaming of Dakar.....

    www.parasiticsanalytics.com

    TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

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      #3
      Originally posted by salty_monk View Post
      I can tell you that the 83 - 750 (also 16" wheel) has forks that are approx 2.5-3" longer. All from memory (and from a long time ago when I built my 750 so I could be making all this up!) but about 35" instead of 32" rings a bell... something like that anyway!

      They are also wider. The 1150 especially so. It's 16" wheel has a hub that is wider & from memory the brake rotors mount .75" further outboard (each side) compared to hub centre.
      I thought I would have the numbers but do not. In theory with the same profile F tire the difference would be 1/2 of 19"-16" at most 1.5".

      Comment

        #4
        My notebook says my 82 1100E forks are 31" from center of axle to end of tube. It is from 13 years ago and is a very quick scribbled notation, so take it for what it's worth...


        Mark
        1982 GS1100E
        1998 ZX-6R
        2005 KTM 450EXC

        Comment

          #5
          Originally posted by mmattockx View Post
          My notebook says my 82 1100E forks are 31" from center of axle to end of tube. It is from 13 years ago and is a very quick scribbled notation, so take it for what it's worth...


          Mark
          I have 30.75"

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            #6
            Thanks guys! This forum is a cornucopia of information. I'll go out and measure my 1150 front this weekend and make notes in my manual.
            1982 GS1100E "Jolene"

            Comment

              #7
              Originally posted by TxGSrider View Post
              Thanks guys! This forum is a cornucopia of information. I'll go out and measure my 1150 front this weekend and make notes in my manual.
              You could post the measurement.

              Comment

                #8
                Originally posted by posplayr View Post
                You could post the measurement.
                Will do. I will try to get it as accurate as I can and post it up.
                1982 GS1100E "Jolene"

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                  #9
                  The 1150 forks are about 32.5" from center of axle to top of tubes.
                  1982 GS1100E "Jolene"

                  Comment

                    #10
                    Thanks

                    I have the GS1100E at 30.75"
                    so the delta is: 32.5"-30.75"=1.75"
                    An approximation is
                    (19"-16")/2=1.5" but you have to add a little for the fork rake take off a bit for the taller 16" profile.

                    Comment

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