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My bike makes a loud rattling noise when above 3500 RPM

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    #1

    My bike makes a loud rattling noise when above 3500 RPM

    My bike makes a loud rattling noise when above 3500 RPM. What do you think it is? It's done this for as long as I've owned it. It's clearly audible above my Vance & Hines 4-1.

    EDIT: It's actually more of a buzzing sound.
    Last edited by Guest; 03-27-2008, 02:27 AM.
    Tags: None
    #2
    How long?

    The first question I can think of is.....how long have you owned it??
    1980 GS1100E....Number 15!

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      #3
      About a year and a half, I've had a few different mechanics work on different things and none of them have ever thought to mention that it is a problem. Could it be valve clearance?

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        #4
        Use a hose in one ear as a listening tool, where is the noise coming from?
        Excessive valve clearance is usually noticed at low RPM.
        http://img.photobucket.com/albums/v5...tatesMap-1.jpg

        Life is too short to ride an L.

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          #5
          Originally posted by tkent02 View Post
          Use a hose in one ear as a listening tool, where is the noise coming from?
          Excessive valve clearance is usually noticed at low RPM.
          What about the other ear?
          GSX1300R NT650 XV535

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            #6
            Originally posted by derwood View Post
            What about the other ear?
            Put a spark plug in it and turn on the ignition.
            http://img.photobucket.com/albums/v5...tatesMap-1.jpg

            Life is too short to ride an L.

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              #7
              Originally posted by tkent02 View Post
              Put a spark plug in it and turn on the ignition.
              Forget about the spark plug, it will only give you another headache. Put your hose on the muffer area. Careful you dont burn it though. 8-[
              If your engine has survived with that noise for 18 months, it's probably just a loose baffle!
              :) The road to hell is paved with good intentions......................................

              GS 850GN JE 894 10.5-1 pistons, Barnett Clutch, C-W 4-1, B-B MPD Ignition, Progressive suspension, Sport Demons. Sold
              GS 850GT JE 1023 11-1 pistons. Sold
              GS1150ES3 stock, V&H 4-1. Sold
              GS1100GD, future resto project. Sold

              http://i155.photobucket.com/albums/s...s/P1000001.jpg
              http://i155.photobucket.com/albums/s...s/P1000581.jpg

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                #8
                Thats a really good idea. Shortly after I go the bike I changed the exhaust to a Vance and Hines 4-1.

                Tomorrow I'll have to experiment.

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                  #9
                  You could be lean on the needle circuit. Is it a pinging or a rattle. If the sound is close together and consistent like metal ball bearings bouncing between two walls it is a ping and you need to raise the needle a half notch to a full notch.
                  1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
                  1985 GS1150ES stock with 85 Red E bodywork.

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                    #10
                    I would say it's more of a buzz now that I think about it. I've noticed that if I'm quickly accelerating it doesn't happen as often. It's more of a slow acceleration noise. I shift right when I hear it, so maybe that's why I haven't had any problems.

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                      #11
                      like a vibrating buzz?

                      Cory

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                        #12
                        Fuel tank? Chain guard? Old mirrors?
                        1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
                        1985 GS1150ES stock with 85 Red E bodywork.

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                          #13
                          I was thinking maybe headlight, dummy light panel, guages, or either hand controls maybe?

                          Cory

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                            #14
                            You shift at 3500 RPM?

                            Whhaaaattttttttttttttttt?
                            http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                            Life is too short to ride an L.

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                              #15
                              is the sound coming from your gears?

                              Cory

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