New motor compatibility

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  • jayzer81

    #1

    New motor compatibility

    anyone know what motors will swap into a '77 GS750 frame...found an 80/81 gs1000 motor I was thinking about fitting into my 77 gs 750...


    thanks



    J
  • tkent02
    Forum LongTimer
    Past Site Supporter
    • Jan 2006
    • 35571
    • Near South Park

    #2
    If it's a chain drive GS1000 engine, it pops right in, you will have to make a couple motor mounts. The 1000 engine is lighter and smaller in every dimension that the 750 engine.
    http://img.photobucket.com/albums/v5...tatesMap-1.jpg

    Life is too short to ride an L.

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    • 850 Combat
      Forum Guru
      Past Site Supporter
      • Sep 2006
      • 6018
      • Spokane, WA, and Hampden, ME

      #3
      Dollars to donuts, the 80/81 is a shaft drive G motor. That would be no joy in Mudville. I never heard of a chain drive 1981.
      Last edited by 850 Combat; 02-11-2012, 06:44 AM.
      sigpic Too old, too many bikes, too many cars, too many things

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      • 1_v8_merc

        #4
        Originally posted by tkent02
        If it's a chain drive GS1000 engine, it pops right in, you will have to make a couple motor mounts. The 1000 engine is lighter and smaller in every dimension that the 750 engine.
        Whaaa? The 1000 is smaller?
        That's good news in Backwards-ville!

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        • tkent02
          Forum LongTimer
          Past Site Supporter
          • Jan 2006
          • 35571
          • Near South Park

          #5
          Lower, shorter, lighter. Go figure.
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

          Comment

          • SqDancerLynn1

            #6
            They eliminated a few pounds with the kick starter.. Great swap. Make sure it is a chain drive motor.

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            • 850 Combat
              Forum Guru
              Past Site Supporter
              • Sep 2006
              • 6018
              • Spokane, WA, and Hampden, ME

              #7
              I have seen 16 valve 1100's in 1000E frames. How difficult is that?
              sigpic Too old, too many bikes, too many cars, too many things

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              • hampshirehog
                Forum LongTimer
                Past Site Supporter
                • Oct 2007
                • 12675
                • Hampshire. UK

                #8
                Originally posted by 850 Combat
                I have seen 16 valve 1100's in 1000E frames. How difficult is that?
                Pops straight in. Bottom bolt holes don't line up, that's all.
                79 GS1000S
                79 GS1000S (another one)
                80 GSX750
                80 GS550
                80 CB650 cafe racer
                75 PC50 - the one with OHV and pedals...
                75 TS100 - being ridden (suicidally) by my father

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