GS1150 Rebuild

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  • pauly
    • Feb 2026

    #1

    GS1150 Rebuild

    So I have started my 1986 GS1150 rebuild. Question is I am sourcing the base and head gasket and they are giving two cylinder options. One is 101424 or 101425- where do I find that information? Same with the crankcase 102247- or 102248-?
    Any help would be appreciated.

    Cheers
    Paul
  • Guest

    #2
    Base gasket part # 11241-00A02
    Cylinder gasket part # 11141-00A03

    These are the correct part numbers for the 86 1150

    Comment

    • pauly

      #3
      Thanks Chef.
      I am not sure why they list the different numbers?
      So the engine will consist of 86 cases, 85 cylinders and transmission and 86 head.
      Also is it better to get the oem timing chain as well, I am guessing its continuous?

      Cheers
      Paul

      Comment

      • gearhead13

        #4
        Originally posted by pauly
        Thanks Chef.
        I am not sure why they list the different numbers?
        So the engine will consist of 86 cases, 85 cylinders and transmission and 86 head.
        Also is it better to get the oem timing chain as well, I am guessing its continuous?

        Cheers
        Paul
        Might as well get a HD chain for it while you are in there, cheaper than OEM I believe
        Z1 Enterprises specializes in quality Motorcycle parts for Honda, Kawasaki, Suzuki and Yamaha Classic Japanese motorcycles from the 1970's and 1980's.

        Z1 Enterprises specializes in quality Motorcycle parts for Honda, Kawasaki, Suzuki and Yamaha Classic Japanese motorcycles from the 1970's and 1980's.

        Comment

        • Guest

          #5
          Are you doing a restoration project of some kind on a GS? Let everyone see what you are doing by posting the details here.

          Comment

          • pauly

            #6
            Thanks guys.
            This will be my first complete tear down. I have done new rings and hone in the past.
            A little nervous swapping over transmissions from the 85 cases to the 86 cases. Hopefully I don't screw it up. I do have my shop manual.

            Comment

            • gearhead13

              #7
              Originally posted by pauly
              Thanks guys.
              This will be my first complete tear down. I have done new rings and hone in the past.
              A little nervous swapping over transmissions from the 85 cases to the 86 cases. Hopefully I don't screw it up. I do have my shop manual.
              I have split cases 5 times or so. Orginization is key, make sure the crank seal stays straight, as soon as the cases are together, put vice grips on the shift shaft and make sure it shifts before tightening it down. Threebond dries fairly quickly, at least mine does, so it needs to be applied and bolts torqued fairly quickly before it dries too much. Oh ya, it stinks too, it will give you a buzz unless you are well ventilated

              Comment

              • Guest

                #8
                Make sure the shifter forks are in the right slots, the o-ring is in the main oil pickup and the spring is on the shifter drum.

                Comment

                • rapidray
                  Forum Guru
                  GSResource Superstar
                  • Oct 2006
                  • 8195
                  • So Cal

                  #9
                  Paul, feel free to call me at 714--356-7845 if you have any questions. I will be glad to help & have been building Suzuki engines for over 30 years. Ray.

                  Comment

                  • pauly

                    #10
                    Thanks Ray.
                    I have seen your posts over the years and you are definatly the engine guru.
                    I split the 85 cases over the weekend to start swapping things over to the 86 cases. Reason I am doing this is because the 85 cases have chunks missing where it looks like it was dropped on the ignition cover.
                    Everything inside looks good, gears, crank etc. Looks like it was redone at some time, even has a DID timing chain installed.
                    Have to clean the 86 cases this week.

                    Now to put my parts list together:
                    -new crankshaft seals (oem) should I replace them?
                    -transmission seals (plugs)?
                    -base/head gasket and o-rings (oem)
                    -rings (oem)

                    Cheers
                    Paul

                    Comment

                    • rapidray
                      Forum Guru
                      GSResource Superstar
                      • Oct 2006
                      • 8195
                      • So Cal

                      #11
                      What are you going to do with the 85 cases? I could use them if you want to do some trading. Ray.

                      Comment

                      • pauly

                        #12
                        Ray:

                        I was going to keep them and see if I could get them welded up and refinished. Just wanted to swap them so I can ride the bike for now and also get my head around these engines a little.

                        Does anybody have a source for clear microfiches for the 1150? On the crankcase the lower part is almost unreadable. That is for Cyclepartsnation, Alpha sports, Mr Cycle,Boulevard Suzuki.

                        Cheers
                        Paul

                        Comment

                        • John Kat
                          Forum Sage
                          • Oct 2010
                          • 1433
                          • France

                          #13
                          Is this microfiche any better?
                          http://www.cmsnl.com/suzuki-gsx1150-...st/FIG-06.html
                          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

                          • pauly

                            #14
                            Thanks John, that one is alot clearer.

                            Does anybody know what this part is?
                            It fell out when I split the cases?

                            Cheers
                            Paul

                            Comment

                            • Guest

                              #15
                              It looks like the gear/neutral indicator pin that has a spring behind it. Fits on the sprocket side under the cover.

                              Comment

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