cyl. base oring?

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  • kdo58
    • Feb 2026

    #1

    cyl. base oring?

    i am putting my gs 850 motor back together and realized i am missing the 4 cyl. orings. that go on the bottom of the cyl. 09280-70001
    should i order some or take a chance?
  • tom203
    Forum Guru
    Past Site Supporter
    • Aug 2010
    • 8925
    • Norway,Maine

    #2
    "take a chance" ? do you want to put them in later?
    They are cheap,so order some now!
    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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    • rapidray
      Forum Guru
      GSResource Superstar
      • Oct 2006
      • 8195
      • So Cal

      #3
      I have removed them from every engine I have taken apart & NEVER had an issue not running them. Ray.

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      • kdo58

        #4
        yea that what i figured. thanks ray, i will continue on then.

        Comment

        • Nessism
          Forum LongTimer
          GSResource Superstar
          Past Site Supporter
          Super Site Supporter
          • Mar 2006
          • 35790
          • Torrance, CA

          #5
          Keeps oil from wicking in the crack between the liner and the cylinder casting. Think the biggest risk is a little oil weapage that could come though porosity in the casting.
          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

          • TeamDar
            Forum Sage
            Past Site Supporter
            • Nov 2008
            • 1137
            • St. Louis, MO

            #6
            I'm with Ray. Even after putting bigger sleeves in stock blocks I have never seen one leak. Kawasaki KZ motors didn't even have them.

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            • Guest

              #7
              I don't use them except for the first time I spent two hours digging the old ones out.

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