do the 850 timing chain need replaced?

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  • gs850cafe
    • Feb 2026

    #1

    do the 850 timing chain need replaced?

    calculating how much i need to finish my rebuild..

    ive read somewhere the timing chain/components dont wear much on these engines...

    is there a way of checking my bikes chain specs?...it needs a upper end rebuild(smokes to high hell) and the inside trans seals leak...and maybe a new piston and wrist pin..(spark plug gets shut just a hair at times)

    the bike runs great as it sits...just dont wanna put money into it if it wont need it
  • rustybronco
    Forum LongTimer
    Bard Award Winner
    GSResource Superstar
    Past Site Supporter
    • Jul 2005
    • 14961
    • Marysville, Michigan

    #2
    Originally posted by gs850cafe

    is there a way of checking my bikes chain specs?...
    Yes and you'll find the "pin to pin' measurement in the shop manual.
    De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

    http://www.thegsresources.com/_forum...35#post1625535

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    • gs850cafe

      #3
      Originally posted by rustybronco
      Yes and you'll find the "pin to pin' measurement in the shop manual.
      awesome thanks

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

        #4
        This "new English" has always left me scratching my head.

        "need replaced"?

        Not as bad as todays use of "like", or "ya know", but in the same conversation.
        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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        • tkent02
          Forum LongTimer
          Past Site Supporter
          • Jan 2006
          • 35571
          • Near South Park

          #5
          Originally posted by gs850cafe

          rebuild(smokes to high hell) and the inside trans seals leak...and maybe a new piston and wrist pin..(spark plug gets shut just a hair at times)
          Are you implying the piston is hitting the spark plug?
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

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          • gs850cafe

            #6
            Originally posted by tkent02
            Are you implying the piston is hitting the spark plug?
            seems to be so...it dont affect it...not sure when it happens...just when i did a compresson check i noticed it

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            • tkent02
              Forum LongTimer
              Past Site Supporter
              • Jan 2006
              • 35571
              • Near South Park

              #7
              You have bigger troubles than rings and valves. Someone used the wrong pistons, or the connecting rods are too long, rod bearings are shot, worn out of round or something.

              Wait, you are using NGK B8ES, correct?
              http://img.photobucket.com/albums/v5...tatesMap-1.jpg

              Life is too short to ride an L.

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              • gs850cafe

                #8
                Originally posted by tkent02
                You have bigger troubles than rings and valves. Someone used the wrong pistons, or the connecting rods are too long, rod bearings are shot, worn out of round or something.

                Wait, you are using NGK B8ES, correct?
                b8es it is..engine looks like its never been opened up maybe i should put my spare crank in?

                Comment

                • 850 Combat
                  Forum Guru
                  Past Site Supporter
                  • Sep 2006
                  • 6018
                  • Spokane, WA, and Hampden, ME

                  #9
                  The BP8ES has a protruding tip. I like those in my Commando. I was wondering if they worked in a GS
                  sigpic Too old, too many bikes, too many cars, too many things

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