GS750 Motor Interchangeability

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  • ericeder141
    • Feb 2026
    #1

    GS750 Motor Interchangeability

    I have an 1980 GS750E and I am wondering if a motor from a 1983 GS750E with mono shock will fit into my frame. The newer motor has only 5k miles and is pretty much in show room condition, plus it always good to have spares. Any info would be appreciated.

    Thank you
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    • rapidray
      Forum Guru
      GSResource Superstar
      • Oct 2006
      • 8195
      • So Cal
      #2
      Yes, it will fit. It is, physically, a smaller engine. It is NOT a bolt in, however. The rear lower mount should bolt up & then it is a matter of fabbing the rest of the mounts. Not all that hard if you have any skills.
      Ray.

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        • ericeder141
          #3
          Better yet can I fit a GS1000 motor in a 750 frame? Looking for a winter project... I love the way my bike handles now but I think extra power would be nice, think the 1000 motor will be to heavy?

            Comment

            • chedd
              #4
              spoke to a guy overhere in the u.k. at a local show,his gs.750was fitted with a gs1000 motor.slots in the frame o.k.rear mounts fit but he had to fab some new front engine mounts.

                Comment

                • rapidray
                  Forum Guru
                  GSResource Superstar
                  • Oct 2006
                  • 8195
                  • So Cal
                  #5
                  Why waste time on an 8 valve engine when a 16 valve 1100 or 1150 will make a LOT more power & there are a LOT more parts available for those engines?!! And those engines are a BOLT IN!!!
                  Ray.

                    Comment

                    • ericeder141
                      #6
                      Originally posted by rapidray
                      Why waste time on an 8 valve engine when a 16 valve 1100 or 1150 will make a LOT more power & there are a LOT more parts available for those engines?!! And those engines are a BOLT IN!!!
                      Ray.
                      Do they literally bolt in or is some custom Fab work necessary?

                        Comment

                        • Guest
                          #7
                          Originally posted by ericeder141
                          Do they literally bolt in or is some custom Fab work necessary?
                          The 1100 will literally bolt in. I know for sure the 80-81 16 valves will for sure, they use the same frame. Lordy, I would love to bolt in an 1150 into my 750E frame and leave the 750 badges on it heheheh.

                            Comment

                            • ericeder141
                              #8
                              Awesome Just need to track down a donor bike now!!

                                Comment

                                • rapidray
                                  Forum Guru
                                  GSResource Superstar
                                  • Oct 2006
                                  • 8195
                                  • So Cal
                                  #9
                                  Originally posted by mrbill5491
                                  The 1100 will literally bolt in. I know for sure the 80-81 16 valves will for sure, they use the same frame. Lordy, I would love to bolt in an 1150 into my 750E frame and leave the 750 badges on it heheheh.
                                  The 1150 valve cover would give it away. Use the 1100 motor for the same look. An 1170 motor would be good to surprise unsuspectors with!!
                                  Ray.

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                                    • 60ratrod
                                      #10
                                      sleeper bikes! i'd kinda like to do that with my 650g.

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                                        • Guest
                                          #11
                                          Originally posted by rapidray
                                          The 1150 valve cover would give it away. Use the 1100 motor for the same look. An 1170 motor would be good to surprise unsuspectors with!!
                                          Ray.
                                          No body around here knows what a 1150 motor looks like. It will work lol. Ooooo a 1170 motor eh? How much lol.

                                            Comment

                                            • rapidray
                                              Forum Guru
                                              GSResource Superstar
                                              • Oct 2006
                                              • 8195
                                              • So Cal
                                              #12
                                              Originally posted by mrbill5491
                                              No body around here knows what a 1150 motor looks like. It will work lol. Ooooo a 1170 motor eh? How much lol.
                                              I have a used set or 3 of 1170 pistons if you are really interested.
                                              Ray.

                                                Comment

                                                • Guest
                                                  #13
                                                  Originally posted by rapidray
                                                  I have a used set or 3 of 1170 pistons if you are really interested.
                                                  Ray.
                                                  Thanks Ray, just wishful dreaming here for now.

                                                    Comment

                                                    • ericeder141
                                                      #14
                                                      Finally trackeddown an 1100 motor question is can I use my stock 750 electronics on the 1100motor (coils, plug wires, etc..) or do i need to also buy the electronics???

                                                        Comment

                                                        • JamesWhut?
                                                          #15
                                                          Yes they are the same. I think even the rotor pickups are (but use the one from the new motor).

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