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    #1

    piston diameters

    For the 1979 year, does anyone know the standard piston diameters for 750s and 850s ?
    Tags: None
    #2
    your haynes or Clymer manual knows....



    You do have one of those after all this time right??

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      #3
      Yes it came with the bike. That SHOULD have been my first sign..

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        #4
        77-79 GS750=65mm
        All GS850=69mm

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          #5
          I have some brand-new standard 850 pistons, if you should need any.

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          hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
          #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
          #2 son: 1980 GS1000G
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            #6
            Originally posted by TeamDar View Post
            77-79 GS750=65mm
            All GS850=69mm
            Thank you. My manual is for 750s.

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              #7
              As a matter of interest..... what is the bore for the GS1000 and the 1100?

              I don't have a manual for these

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                #8
                GS1000= 70mm
                GS1100= 72mm
                GS1150= 74mm

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