Announcement

Collapse
No announcement yet.

Stretched timing chain?

Collapse
X
Collapse
 
  • Page of 2
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • #1

    Stretched timing chain?

    I have an auto tensioner, but when I crank up after sitting over night or after work, I hear what sounds like the timing chain slapping in the front of the motor.
    Once it warms up I don't hear it any more.
    I wonder if the auto tensioner is maxed out and my chain is stretched?

    I guess I could put my old manual tensioner in to see if the noise stops, but it doesn't leak a drop now and I don't want to fool with it if not truly needed.

    The motor has a little over 38k miles.

    Any thoughts?
    79 XS11
    Tags: None
  • #2
    Video with audio????
    Greg

    Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

    ― Albert Einstein

    80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

    The list changes.

    Comment

    • #3
      Hmmm.. A warm chain would become even more loose. I have heard of the teflon pads coming off the chain guards, but I would think it would make the noise all the time.

      Have you checked your earl lately? (Oil to you non-southern folk..) and when was the last time you replaced the filter? Have you recently put a windshield or fairing on? The new noises coming from the motor after I did that the first time scared the heebie jeebies outta me.
      Try your hardest to be the kind of person your dog thinks you are.

      You can live to be 100, as long as you give up everything that would make you want to live to be 100!

      Current bikes:
      '06 Suzuki DR650
      *'82 XJ1100 with the 1179 kit. "Mad Maxim"
      '82 XJ1100 Completely stock fixer-upper
      '82 XJ1100 Bagger fixer-upper
      '82 XJ1100 Motor/frame and lots of boxes of parts
      '82 XJ1100 Parts bike
      '81 XS1100 Special
      '81 YZ250
      '80 XS850 Special
      '80 XR100
      *Crashed/Totalled, still own

      Comment

      • #4
        I'm having the same issue with the 78E that I just put back on the road. It has fresh oil and a new filter. I am going to check the auto tensioner to see if for some reason it is not ratcheting properly. I know it has not maxed out. The only other thing I can think of is oil is not flowing properly, (the engine did sit for a long time) clogged oil pump screen or poor oil pressure.
        The auto tensioners on the 80, 81 and the XJ are all working fine.

        I will take a video of what mine is doing in the morning so we can compare.
        Ty

        78 XS1100E - Now in Minnesota
        80 XS1100LG - The Punisher
        82 XJ1100 - Current project - The Twins
        82 XJ1100 - Wife's Bike - The Twins
        82 XJ1100 - Daughter's Bike
        72 Suzuki TS125 - Daughter's Bike
        72 Yamaha Mini JT2 - Youngest Daughter's bike (She wants a bigger one now)

        Comment

        • #5
          Piston slap sounds like that too, and from the same area, once warm the noise stops.

          The good thing about the manual CCT is you can tension up the chain then remove the CCT and check how much travel is used up on the spring loaded rod.
          Tom
          1982 5K7 Sport, restored to original from a wreck
          1978 2H9 (E), my original XS11, mostly original
          1980 2H9 monoshocked (avatar pic)http://i145.photobucket.com/albums/r...psf30aa1c8.jpg
          1982 XJ1100, waiting resto to original

          Comment

          • #6
            If the teflon, (or whatever it is) departs the chain damper assembly, I would expect you'd be finding pieces of it in the oil filter. That stuff has to be on the damper or in the filter. You would be finding little black strips of plastic.
            Marty (in Mississippi)
            XS1100SG
            XS650SK
            XS650SH
            XS650G
            XS6502F
            XS650E

            Comment

            • #7
              I hear what sounds like the timing chain slapping in the front of the motor
              Could be the HyVo chain slapping around in there (common occurrence) and when the motor is warmed up and running smoothly, no more slap. Sometimes syncing the carbs will quiet it down, YMMV
              Last edited by bikerphil; 09-18-2014, 07:42 AM.
              2H7 (79) owned since '89
              3H3 owned since '06

              "If it ain't broke, modify it"

              ☮

              Comment

              • #8
                This is when it is cold
                http://s850.photobucket.com/user/tco...tml?sort=3&o=0

                This is when it is warm
                http://s850.photobucket.com/user/tco...tml?sort=3&o=1

                I had to download the video to se it hopefully it works.
                Ty

                78 XS1100E - Now in Minnesota
                80 XS1100LG - The Punisher
                82 XJ1100 - Current project - The Twins
                82 XJ1100 - Wife's Bike - The Twins
                82 XJ1100 - Daughter's Bike
                72 Suzuki TS125 - Daughter's Bike
                72 Yamaha Mini JT2 - Youngest Daughter's bike (She wants a bigger one now)

                Comment

                • #9
                  Definitely sounds like valve train noise. You can check for too much chain slack by removing the valve cover and pulling upward on the chain at the bridge, shouldn't have any more than 1/4" of travel.
                  2H7 (79) owned since '89
                  3H3 owned since '06

                  "If it ain't broke, modify it"

                  ☮

                  Comment

                  • #10
                    Doesn't sound like the cam chain to me. Almost sounds like pre-detonation, but in that area, you might take off your sidecover there and take a look at your timing assembly and make sure it's not flopping back and forth, or that it isn't rusted and moves freely. Also check for vacuum leaks in the rubber line going to it.

                    The engine sounds a bit lopey to me like it could use a good carb synch, but I could also just be hearing that exhaust closest to the camera.
                    Last edited by trbig; 09-18-2014, 05:08 PM.
                    Try your hardest to be the kind of person your dog thinks you are.

                    You can live to be 100, as long as you give up everything that would make you want to live to be 100!

                    Current bikes:
                    '06 Suzuki DR650
                    *'82 XJ1100 with the 1179 kit. "Mad Maxim"
                    '82 XJ1100 Completely stock fixer-upper
                    '82 XJ1100 Bagger fixer-upper
                    '82 XJ1100 Motor/frame and lots of boxes of parts
                    '82 XJ1100 Parts bike
                    '81 XS1100 Special
                    '81 YZ250
                    '80 XS850 Special
                    '80 XR100
                    *Crashed/Totalled, still own

                    Comment

                    • #11
                      The older engines will lope a little because of the cams when they are cold or idling too slow.

                      You could be onto something with the vacuum advance though Tod. We started the MNS Doc just got the other day just after he got all the parts swapped over from his SG and it sounded like it had a rod knocking. After looking it over and noticing the vacuum advance hose had been hooked to the boot rather than the #2 carb I switched it and the knock went away.

                      I was also thinking maybe an exhaust leak on Bart's bike too. They seem to go away when the engine and exhaust get warmed up too.
                      Greg

                      Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                      ― Albert Einstein

                      80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                      The list changes.

                      Comment

                      • #12
                        OOPS! I mean tcoops bike.
                        Greg

                        Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                        ― Albert Einstein

                        80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                        The list changes.

                        Comment

                        • #13
                          It is getting close to oil and filter changing time but don't think that is it. I had to take the exhaust off last weekend to put the new tire on and that seems solid.

                          I will try and get an audio of it this Sat. Morning...

                          It is not constant, just a little random slap inside front while idling at cold warm up.

                          I am going to try and come to N.C. Next weekend for a few hours, but it won't be cold for anyone to hear then.
                          79 XS11

                          Comment

                          • #14
                            You should try and come to NC and at least stay for one night. Your not that far away.

                            bikerphil, I, and many others who could be of help will be there. Friday evening would be best.
                            Greg

                            Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                            ― Albert Einstein

                            80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                            The list changes.

                            Comment

                            • #15
                              Might also be a broken internal pipe in the factory header, might try tapping on them with a rubber mallet.
                              2H7 (79) owned since '89
                              3H3 owned since '06

                              "If it ain't broke, modify it"

                              ☮

                              Comment

                              Previous 1 2 template Next
                              Working...
                              X