Gear Oil Preference?

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  • RustyTank
    Forum Mentor
    Past Site Supporter
    • Sep 2018
    • 469
    • Edmonds, WA

    #1

    Gear Oil Preference?

    Hello. I have a 1979 GS850G. I'm curious what brand SAE90 gear oil do you guys prefer? I'm in the states.

    PO used a synthetic btw.
    Ryan

    1979 GS850G - currently undergoing a major overhaul
    1986 GSX-R750 - I'm figuring it out
  • Steve
    GS Whisperer
    • Jun 2005
    • 35925
    • southwest oHIo

    #2
    Synthetic is fine. Straight 90w, 85w-90, 80w-90, whatever you can find.

    I tend to change it every tire change, since access is easier.

    If you have the rear wheel off, don't forget to also lube the splines with MOLY paste.

    .
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    • RustyTank
      Forum Mentor
      Past Site Supporter
      • Sep 2018
      • 469
      • Edmonds, WA

      #3
      Originally posted by Steve
      Synthetic is fine. Straight 90w, 85w-90, 80w-90, whatever you can find.

      I tend to change it every tire change, since access is easier.

      If you have the rear wheel off, don't forget to also lube the splines with MOLY paste.

      .
      Thanks Steve. I found a 75W-90 synthetic. Sounds like that'll do the job.
      And thanks for the MOLY Paste tip
      Ryan

      1979 GS850G - currently undergoing a major overhaul
      1986 GSX-R750 - I'm figuring it out

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      • Grimly
        Forum Guru
        Past Site Supporter
        Super Site Supporter
        • Sep 2012
        • 5762
        • Ireland

        #4
        Originally posted by RustyTank
        Hello. I have a 1979 GS850G. I'm curious what brand SAE90 gear oil do you guys prefer? I'm in the states.

        PO used a synthetic btw.
        I'm using a synthetic 75w / 90 - was like water when I poured it in. I can honestly say I think I felt a difference.
        I change mine every 50,000 miles or blue moon, whichever falls sooner.
        Dave
        '79 GS850GN '80 GS850GT
        Only a dog knows why a motorcyclist sticks his head out of a car window

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        • RustyTank
          Forum Mentor
          Past Site Supporter
          • Sep 2018
          • 469
          • Edmonds, WA

          #5
          Originally posted by Grimly
          I'm using a synthetic 75w / 90 - was like water when I poured it in. I can honestly say I think I felt a difference.
          I change mine every 50,000 miles or blue moon, whichever falls sooner.
          Excellent info! Thanks Grimly
          Ryan

          1979 GS850G - currently undergoing a major overhaul
          1986 GSX-R750 - I'm figuring it out

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