Frame/engine pairing for 7-11 swap?

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  • MisterCinders
    #1

    Frame/engine pairing for 7-11 swap?

    Was spit balling ideas for a no-holds-barred GS build the other day with a friend, and I mentioned the 7-11 swap (1100 motor in a 750 frame).

    Did a few searches, but cannot nail down the year/model range of the frames and engines that work for this swap. I'd assumed it was just another mod for the 77-79 GS 750 bikes, but now am not so sure.

    So what's the Venn Diagram for frames and engines that can cross-breed into a 7-11 build?

    TIA
    Tags: None
    • Guest
      #2
      7/11 swap

      Last months' issue of Classic Motorcycle Mechanics has a decent article on that subject, you can order back issues (from a US distributor) at
      www.classicbikebooks.com. Unsure of any source material for the 8-valvers, though.

        Comment

        • John Kat
          Forum Sage
          • Oct 2010
          • 1433
          • France
          #3
          There was an article in Classic Motorcycle Mechanics dated July 2005 that described A GS 750 with a GS 1000 engine.
          It doesn't mention what had to be done to fit the engine in the frame but I believe the lower brackets have to be modified?
          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

            • gearhead13
              #4
              You must be talking about an 1100E 4 valve engine, the 1100 2 valve engines were all shaftys . I dont know about pre-80 frames, but 80-82 750 accepts the 1100E, not the 83 & up.

                Comment

                • posplayr
                  Forum LongTimer
                  GSResource Superstar
                  Past Site Supporter
                  • Dec 2007
                  • 23673
                  • Tucson Az
                  #5
                  Originally posted by gearhead13
                  You must be talking about an 1100E 4 valve engine, the 1100 2 valve engines were all shaftys . I dont know about pre-80 frames, but 80-82 750 accepts the 1100E, not the 83 & up.
                  The GS1000E's are 8V chain drive, like the Cooley replicas

                  http://www.suzukicycles.org/GS-series/GS1000.shtml

                    Comment

                    • MisterCinders
                      #6
                      So is the 7-11 swap strictly a 16-valve affair?

                        Comment

                        • gearhead13
                          #7
                          Originally posted by MisterCinders
                          So is the 7-11 swap strictly a 16-valve affair?
                          Well, no but you said 1100 and yours is a chain drive, the 1000E was chain drive, the 1100G is shaft and the 1100 chain drive is a 4 valve.
                          I believe you can stuff an 1000E engine in there and possibly an 1100E.

                            Comment

                            • MisterCinders
                              #8
                              Originally posted by gearhead13
                              Well, no but you said 1100 and yours is a chain drive, the 1000E was chain drive, the 1100G is shaft and the 1100 chain drive is a 4 valve.
                              I believe you can stuff an 1000E engine in there and possibly an 1100E.
                              This would be a totally different bike, not my current 7/850.

                                Comment

                                • Sojourner
                                  #9
                                  Interested in hearing this. I keep looking at the Kats and ES's, but want to stay around 1100cc. Would love to see an 1100 or 1150 shoved into this... http://cincinnati.craigslist.org/mcy/3776181155.html

                                  Probably easier to just wait around and find a decent 1150E with a fairing and deal with the subtle differences.

                                    Comment

                                    • MisterCinders
                                      #10
                                      So what about 1100/1150 top end and cranks on a 1000 chain drive bottom in a 750 frame?

                                      Heh.

                                        Comment

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