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Rear Cam Chain Guide Broke in Half - How to Remove?

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    #1

    Rear Cam Chain Guide Broke in Half - How to Remove?

    Just pulled off the head of my 81 GS650L and found that the cam chain guide has broken in half.

    IMG_5057.jpg

    Doe the engine need to be torn down further to get this piece out and replaced?
    Blog of my motorcycle projects - http://twowheeljunkie.wordpress.com/
    1981 Suzuki GS650L - Project Bike - Sold
    2013 Suzuki SFV650 - Sold
    2016 Ducati Multistrada 1200 Touring
    Tags: None
    #2
    Gotta pull the jugs so it can be taken out. Now is a good time to put in new valve stem seals and clean the carbon off the valves and the piston tops. Do a basics top end refresh and youll be done for a very very long time. Depending on miles you can even consider honing the cylinders and installing new rings too. May not be a needed thing but its pen now is how i look at it if it was mine.
    Last edited by chuck hahn; 03-05-2017, 06:43 PM.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

    Comment

      #3
      This manual should do the trick.
      http://zeus.mtsac.edu/~cliff/storage/gs/GS650GManual.pdf
      Last edited by chuck hahn; 03-05-2017, 06:33 PM.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

        #4
        I'm not sure how it's held in down there (and I hope never to have to find out!) but it has a hinge pin thru guide at bottom anchored somehow





        image.jpg
        1981 gs650L

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

        Comment

          #5
          There are detents milled in that trap the lower hinge. If i remember right you start the jugs down on the studs then insert the guide into the lower detent from down the chain tunnel. then you finish setting the jugs down and this traps the guide.
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment

            #6
            You have to split the cases to replace the guide. The lower hinge is trapped in a groove between the case halves. Dar

            Comment

              #7
              I stand corrected...page 3-19 shows removal after cracking the cases.
              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

              Comment

                #8
                Sounds like I have some more work to do. Will keep digging down and see what I find, but the manual definitely shows splitting the case to remove this guide and dampers.
                Last edited by DaveP; 03-05-2017, 09:01 PM.
                Blog of my motorcycle projects - http://twowheeljunkie.wordpress.com/
                1981 Suzuki GS650L - Project Bike - Sold
                2013 Suzuki SFV650 - Sold
                2016 Ducati Multistrada 1200 Touring

                Comment

                  #9
                  Bummer.........what symptoms did you have that made you take the head off?
                  Rob
                  1983 1100ES, 98' ST1100, 02' DR-Z400E and a few other 'bits and pieces'
                  Are you on the GSR Google Earth Map yet? http://www.thegsresources.com/_forum...d.php?t=170533

                  Comment

                    #10
                    I suspected the no. 3 intake valve was bent due to the timing jump and significant loss of compression in that cylinder. The number 3 intake valve clearance changed from 0.1mm to 0.24mm after the timing jumped suggesting that the valve was no longer fully seating. Visually, I can't see that in the valves with the head removed, so will need to do some more measurements once that valves are removed. Was surprised to see this guide broken in half, but it seems that it does happen.
                    Blog of my motorcycle projects - http://twowheeljunkie.wordpress.com/
                    1981 Suzuki GS650L - Project Bike - Sold
                    2013 Suzuki SFV650 - Sold
                    2016 Ducati Multistrada 1200 Touring

                    Comment

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