how much fork oil

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  • 67camaro
    • Feb 2026

    #1

    how much fork oil

    I need to know how much oil to put in my forks. the forks are from a 1980 gs550l
  • Greg B
    Forum Mentor
    Past Site Supporter
    • Sep 2005
    • 894
    • Irvine, CA

    #2
    217 ML



    Data courtesy of Basscliff
    The Three Horsemen
    '85 GS1150ES (Current Income Eater)
    '83 GS1100ES
    ?77 XLCR

    "Never ride faster than you can see. Besides, it's all in the reflexes."
    Porkchop Express

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    • 67camaro

      #3
      thanks for the info

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      • bwringer
        Forum LongTimer
        Bard Award Winner
        GSResource Superstar
        Past Site Supporter
        Super Site Supporter
        • Oct 2003
        • 17066
        • Indianapolis

        #4
        That fill amount is with the forks completely dry, so if you only drained the forks, they'll be overfilled by some unknown amount.

        It's far more accurate and important to set the fork oil LEVEL exactly the same in both legs.
        1983 GS850G, Cosmos Blue.
        2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
        2015 Yamaha FJ-09, Magma Red Power Corrupts...
        Eat more venison.

        Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

        Celeriter equita, converteque saepe.

        SUPPORT THIS SITE! DONATE TODAY!

        Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

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        • 67camaro

          #5
          they are completely dry. Took them apart to swap lowers

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          • bwringer
            Forum LongTimer
            Bard Award Winner
            GSResource Superstar
            Past Site Supporter
            Super Site Supporter
            • Oct 2003
            • 17066
            • Indianapolis

            #6
            Originally posted by 67camaro
            they are completely dry. Took them apart to swap lowers
            Excellent! Sometimes the manuals don't give a fork oil level measurement.

            It might be helpful for someone else if you could post the fork oil level you get (springs out, forks collapsed) once you've measured in the right amount of oil.
            1983 GS850G, Cosmos Blue.
            2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
            2015 Yamaha FJ-09, Magma Red Power Corrupts...
            Eat more venison.

            Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

            Celeriter equita, converteque saepe.

            SUPPORT THIS SITE! DONATE TODAY!

            Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

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            • 67camaro

              #7
              ok will do

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              • mike_of_bbg

                #8
                geometrically speaking, is there any reason the distance measurement would be different between straight up and down, and installed, if one was measuring on the very left or right side of the fork tube?

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