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Clunking noise on bumps and shifting HELP!!!

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    Clunking noise on bumps and shifting HELP!!!

    Hello all,

    I own a 1979 gs550 that has some customization done to it and im having problems with an unfamiliar noise. When i hit big bumps,i get a metal clank in the engine or trans. It gets worse if im not accelerating or if the clutch is pulled in. I tightened the chain until it is almost solid feeling and it gets better but it still does it on large bumps. Is there any torque requirments on the drive sprocket nut out of the trans? Its notfinger loose but I cant think of anything else that could cause externally. The chain is new,lubed,and tight. Otherwise,the bike runs like a dream,and this doesnt cause any drivability problems. And just in case it matters,the bike is a rigid,streched about 11 inches,raked,and doesnt resemble anything that looks like a gs550. It is about 9 ft long. Thanks for any help you can give me.

    #2
    pics please. sounds like it could be from your rigid tail. not sure though.

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      #3
      This is the only pics i have at work. Wont tell you much but it is a rough ride. The frame is solid but im sure its in the motor. Dont laugh guys its and old ratty bike. That the way i like it.

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        #4
        Originally posted by NEO View Post
        This is the only pics i have at work. Wont tell you much but it is a rough ride. The frame is solid but im sure its in the motor. Dont laugh guys its and old ratty bike. That the way i like it.
        I dont have any advice for ya but that looks slick Post some better pics tonight!

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          #5
          Is your side stand spring a little weak maybe letting the stand clunk on bumps?

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            #6
            Originally posted by onchiman View Post
            Is your side stand spring a little weak maybe letting the stand clunk on bumps?

            There is no side stand or kick stand of any sort. Ill try to get more pics tonight for you to see the chain and frame setup.

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              #7
              Ahhhh, I think Frankenstein made some clunky noises when he moved around too. :-D
              82 1100 EZ (red)

              "You co-opting words of KV only thickens the scent of your BS. A thief and a putter-on of airs most foul. " JEEPRUSTY

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                #8
                Originally posted by bonanzadave View Post
                Ahhhh, I think Frankenstein made some clunky noises when he moved around too. :-D

                Thats funny.The name for my bike was a toss up between frankenstein, thor or 86 which is what i have almost done several times to the bike. I choose THOR.

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                  #9
                  to the top. Any more suggestions?

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