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    #1

    Transplanting cylinder sleeves

    Are the early 750 ( 77/78 ) sleeves the same OD as the 1000 sleeves? NOT the bores.. the actual outside diameter of the sleeves themselves. I may be looking to replace 3 sleeves in a 78 1000 cylinder and i have a guy that can bore them to the prescribed 70MM. Im thinking they were the same on the 750 and 1000 only difference being the bore diameters

    EDIT............. As was pointed out by Ed theres probably not gonna be 750 sleeves that will work. Im ammending this post to ask about the 850 sleeves, which have a bore diameter of 69MM.
    Last edited by chuck hahn; 05-02-2025, 10:33 PM.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.
    Tags: None
    #2
    Not a chance. 65mm bore vs 70mm. No way Suzuki used the same sleeves.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

    Comment

      #3
      ED...
      I rechecked the specs on bikecliff service manuals and the 79 850 had a 69MM bore. Id almost bet they would be the same OD. I checked the bore on these cylinders and they only have 27000 miles on them. Put new rings in it today and buttoned it up in hopes the new rings solve the oil in the cylinders and the smoking. New valve stem seals from a few weeks ago but it still smoked so i decided screw it and do new rings too.
      I had originally intended to replace the rings but when i cleaned up all the packaging crap in the shop i must have thrown the new ones away. I went to the dumpster but it had already been picked up. So i decided to roll the dice and hope the stem seals would do it... I lost the bet and had to reorder yet another second rings.
      So as it stands now it has new stem seals and new rings. Tomorrow ill put the exhaust and carbs on and see what happens. I pray its good. If not ill find some 69MM sleeves and have them bored to 70MM. Thats the only thing left if it doesn't clear up tomorrow.

      I will go back and edit the original post.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

        #4
        UPDATE..
        I put pipes and carbs on and no smoke so i dodged the bullet. HOWEVER i still am looking for some information as to if the 850 sleeves will go into a 1000 block. It will be good info to have AND even if the 850 bores are a little rough they will be perfect for reboring up to 70MM. Much cheaper and faster to rebore them than to buy new sleeves. LA Sleeve wants your life savings for new ones and they have a 6 week delivery time on top of that.

        Maybe someone with a 850 block laying around can throw some calipers to the bottom of the sleeves and post up a good number.....
        Last edited by chuck hahn; 05-03-2025, 03:41 PM.
        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

        Comment

          #5
          Does anyone have a cylinder block laying around that they can measure to outside diameter and post up a number for me to check against the 1000 barrels?
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment

            #6
            Here ya go, from a 1979 850 block.
            Cyl 1 - 74.84mm
            Cyl 2 - 75.14mm
            Dave
            '79 GS850GN '80 GS850GT
            Only a dog knows why a motorcyclist sticks his head out of a car window

            Comment

              #7
              cool. ill measure the OD on the 1000 block i have setting on my bench. Least ill know if they are compatible. Thanks for the info.
              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

              Comment

                #8
                If you look on the bottom of the cylinder block, you will see a blob of colored paint next to each liner, and the color varies from cylinder to cylinder. I'm not positive, but I think these colors represent selective fit on the liners into the block. While i7 may seem that all liners are the same, they may not be. It wouldn't surprise me if a different liner is really tight, or just falls into the hole on another block.

                Screenshot 2025-05-05 160654 by nessism, on Flickr

                Screenshot 2025-05-05 160437 by nessism, on Flickr
                Last edited by Nessism; 05-05-2025, 07:13 PM.
                Ed

                To measure is to know.

                Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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