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1982 GS750E / GS1000SZ piston interchangeability question

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    1982 GS750E / GS1000SZ piston interchangeability question

    Does anyone know if the 1980-84 GS750E pistons w 70mm bore can be used in the GS1000SZ engines without any issues? Stroke is 53mm for the 750 and 66mm for the 1000.

    Wiseco does not believe they are interchangeable due to stroke differences however Yoshimura lists the GSX750 and GSX1000 pistons as the same piston at 70.3mm bore...

    Anyone have experience using 750 pistons in the 1000 blocks once machined to fit?
    2007 BMW G650-XMoto
    1982 GS100SZ Street
    1982 GS1000SZ AHRMA VSH#813
    1982 GS1000SZ Resto Mod Project
    1983 GS1100ED Pro Street - Dick Speed build

    #2
    seem the pin location and or diameter would be different?
    not sure about the valve angles of the kat for the 750 eye brows either.
    i can't say for sure..

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      #3
      Both have 18mm piston pins, pin location might be the difference - does anyone have a 750 piston I could borrow to check dimensions against what I have?
      2007 BMW G650-XMoto
      1982 GS100SZ Street
      1982 GS1000SZ AHRMA VSH#813
      1982 GS1000SZ Resto Mod Project
      1983 GS1100ED Pro Street - Dick Speed build

      Comment


        #4
        Here is what is fueling my curiousity - a set of rare Yoshimura pistons with references to both models GSX750 / GSX1000S Katanas



        If only there were 4 pistons this would be gone!
        2007 BMW G650-XMoto
        1982 GS100SZ Street
        1982 GS1000SZ AHRMA VSH#813
        1982 GS1000SZ Resto Mod Project
        1983 GS1100ED Pro Street - Dick Speed build

        Comment

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