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GS1100g top end on GS1000

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    GS1100g top end on GS1000

    I know this has been brought up before, but I can't figure out if I can run a GS1100g barrel & pistons on a GS1000 8-valve. I know the G has a longer stroke (by 2mm, I think), but is the difference in the pistons, rods, cylinder or all three?

    I've got a set of GS1100G cylinders sitting here that I'd love to use if I can...

    #2
    Hey,

    I am actually looking to do the same thing.

    Have a look here:

    Comment


      #3
      I have heard the 1100g head can fit on the 1000 block.
      78 GS1000 Yosh replica racer project
      82 Kat 1000 Project
      05 CRF450x
      10 990 ADV-R The big dirt bike

      P.S I don't check PM to often, email me if you need me.

      Comment


        #4
        So I did some measuring just to see how it works out.

        Catalog data:

        GS1000 = 70mm bore X 64.8mm stroke, 997cc
        GS1100g = 72mm bore X 66mm stroke, 1074cc

        Measured data:
        GS1100 = 72mm piston, 18mm pin, 26mm deck (center-top), 88mm cylinder height
        GS1000 = 70mm piston, 18mm pin, 26mm deck (center-top), approx 88mm cylinder height (don't have one to check)

        So it looks like the GS1100 cylinder will work, but I'd hone it and run new rings to get the best ring seal.


        The resulting displacement will be only 1050cc, though, so I don't know if it's worth it. I wonder what compression is?

        Comment


          #5
          Originally posted by robertob View Post
          So I did some measuring just to see how it works out.

          Catalog data:

          GS1000 = 70mm bore X 64.8mm stroke, 997cc
          GS1100g = 72mm bore X 66mm stroke, 1074cc

          Measured data:
          GS1100 = 72mm piston, 18mm pin, 26mm deck (center-top), 88mm cylinder height
          GS1000 = 70mm piston, 18mm pin, 26mm deck (center-top), approx 88mm cylinder height (don't have one to check)

          So it looks like the GS1100 cylinder will work, but I'd hone it and run new rings to get the best ring seal.


          The resulting displacement will be only 1050cc, though, so I don't know if it's worth it. I wonder what compression is?
          Can anyone explain the 26mm deck (center-top) measurement listed above?
          Steve

          1979 GS1000E (45 Yrs), 1981 GPz550 (11 Yrs)

          Comment


            #6
            Centre of the pin to top of the piston?
            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..... - FOR SALE!

            www.parasiticsanalytics.com

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

            Comment


              #7
              Dan, I think you are right.

              I went over Tom's (Tkent02) garage and we took some measurements of my GS1100G and one of Tom's GS1000E cylinder block. The cylinder height was measured from the base gasket surface to the head gasket surface with a digital caliper. Note: The GS1100G measurement includes the thickness of the base gasket (.35 - .50mm). It's stuck on pretty good after 27 years

              Measured Data:
              GS1000E: 86.8 to 86.9mm
              GS1100G: 87.4 to 87.5mm with Gasket
              Steve

              1979 GS1000E (45 Yrs), 1981 GPz550 (11 Yrs)

              Comment


                #8
                Two threads running at the same time on the same subject?
                This forum contains old posts which may have information which may be useful. It is a closed forum in that you can not post here any longer. Please post your questions in the other technical forums.


                Dan

                Comment


                  #9
                  No, I searched and found both and decided to resurrect them since neither thread came to a conclusion. I have a GS1100G head and like Kochic I am interested in using a GS1100G cylinder for a larger bore Wiseco pistons, 73.5mm in my case.

                  7981GS,
                  Can you take a height measurement of one of your GS1100G cylinders with a digital caliper or a micrometer? My measurement above includes the base gasket and I am interested to see how your measurement compares to the GS1000E cylinder measurement of 86.8 to 86.9mm. I took the measurement at the ends of the cylinders.

                  TIA
                  Steve
                  Last edited by srsupertrap; 12-24-2010, 11:11 AM.
                  Steve

                  1979 GS1000E (45 Yrs), 1981 GPz550 (11 Yrs)

                  Comment


                    #10
                    Originally posted by srsupertrap View Post
                    No, I searched and found both and decided to resurrect them since neither thread came to a conclusion. I have a GS1100G head and like Kochic I am interested in using a GS1100G cylinder for a larger bore Wiseco pistons, 73.5mm in my case.

                    7981GS,
                    Can you take a height measurement of one of your GS1100G cylinders with a digital caliper or a micrometer? My measurement above includes the base gasket and I am interested to see how your measurement compares to the GS1000E cylinder measurement of 86.8 to 86.9mm. I took the measurement at the ends of the cylinders.

                    TIA
                    Steve
                    Gs1085 -73mm ,73.5mm is a 1100kit.

                    Comment


                      #11
                      Originally posted by gshub View Post
                      Gs1085 -73mm ,73.5mm is a 1100kit.
                      gshub,
                      You are right those are pistons sizes. I am actually interested in the GS1000 & GS1100g cylinder height (not bore) measured from the base gasket surface to the head gasket surface with a digital caliper.
                      Steve

                      1979 GS1000E (45 Yrs), 1981 GPz550 (11 Yrs)

                      Comment


                        #12
                        Originally posted by srsupertrap View Post
                        gshub,
                        You are right those are pistons sizes. I am actually interested in the GS1000 & GS1100g cylinder height (not bore) measured from the base gasket surface to the head gasket surface with a digital caliper.
                        I just saw this, I'll try to measure them for you when we get back from Church.

                        Daniel

                        Comment


                          #13
                          Deck height, is .020 higher on the 1074 cylinder Vs. the 997 cylinder.

                          Daniel

                          Comment


                            #14
                            bolt it togather. done many of them. big incrae for little effort

                            Comment


                              #15
                              People are using our 75 mm pistons with the 1100g set up. Bores right in. 1166cc

                              Last edited by Big Jay; 01-01-2011, 01:36 AM.
                              Speed Merchant
                              http://www.gszone.biz

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