piston wrist pins. 1100G,

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  • Redman
    Forum LongTimer
    Past Site Supporter
    Super Site Supporter
    • Mar 2004
    • 13765
    • Michigan, west Michigan

    #1

    piston wrist pins. 1100G,

    Originally posted by Redman
    . . . . . . . . . . . . .
    Started looking at getting some familiarity with piston rings. (taint never seen any of my piston rings before this project, and dont want to see any again afterwards).
    Reading the factory manaul and practicing with the rings that came with the replacement/salvage pistons.

    .
    ..
    (picture doesnt specifically pertain to my question.)

    For my 1100GK engine rebuild, I got a used set of pistons (and new rings and new wrist pin clips). The pistons came with wrist pins, and were stated to be low mileage.

    Question: WOuld you recommend using the wrist pins that came with the pistons? Pistons are low mileage, and wrist pins come out easy and look good.
    Or, use my original wrist pins. Are going back on existing con rods, 84K. I had to work at getting a couple of them out.

    Thanks
    Bikes
    Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​
  • GregT
    Forum Sage
    • Jul 2009
    • 3541
    • New Zealand

    #2
    Personally, if i'm choosing between used pins, they get measured - carefully.
    3 places - the two ends which run in the pistons - and the center.
    Least worn set of four wins - provided they are the same wall thickness. Discolouration is grounds for exclusion.
    I do give them a quick polish with 240 wet and dry paper in the lathe.

    If you're really picky, you could weight match them too.

    Comment

    • tatu
      Forum Sage
      Past Site Supporter
      • Jun 2010
      • 3175
      • UK

      #3
      You might like to check these people out I use them all the time now. All their stuff is excellent quality. The piston rings that I used in my last two rebuilds were NPR who supply OEM. The cost is a fraction of OEM

      CRUZINIMAGE.NET | Specialty store of motorcycle parts
      sigpic

      Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.

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      • Redman
        Forum LongTimer
        Past Site Supporter
        Super Site Supporter
        • Mar 2004
        • 13765
        • Michigan, west Michigan

        #4
        Originally posted by tatu
        You might like to check these people out I use them all the time now. All their stuff is excellent quality. The piston rings that I used in my last two rebuilds were NPR who supply OEM. The cost is a fraction of OEM

        CRUZINIMAGE.NET | Specialty store of motorcycle parts
        Cruzinimage is what rings I got.
        Bikes
        Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

        Comment

        • Redman
          Forum LongTimer
          Past Site Supporter
          Super Site Supporter
          • Mar 2004
          • 13765
          • Michigan, west Michigan

          #5
          Originally posted by GregT
          Personally, if i'm choosing between used pins, they get measured - carefully.
          3 places - the two ends which run in the pistons - and the center.
          Least worn set of four wins - provided they are the same wall thickness. Discolouration is grounds for exclusion.
          ......
          Good idea. I have digital calipers. My originals have some dark discoloration, so maybe not bother with the measuring.
          Thanks.


          Originally posted by GregT
          ....
          If you're really picky, you could weight match them too.
          I aint.
          Bikes
          Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

          Comment

          • Nessism
            Forum LongTimer
            GSResource Superstar
            Past Site Supporter
            Super Site Supporter
            • Mar 2006
            • 35811
            • Torrance, CA

            #6
            Need a micrometer that reads down to .0001" to measure wrist pins.

            I'd go with the pins from the new/used pistons.
            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

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            • bwringer
              Forum LongTimer
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              • Oct 2003
              • 17073
              • Indianapolis

              #7
              The ones that look better will be better about 99% of the time.
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              Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

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