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"Buzz" at lower RPM

  • Thread starter Thread starter burkslaw
  • Start date Start date
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burkslaw

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I recently acquired an '80 GS1100L. Motor sounds great--no strange noises, and runs perfectly. There is a really annoying buzz from 2000 to 3800 RPM that is felt through the gas tank. However, at 4000 RPM everything smoothes out. The engine has absolutely no vibration whatsoever above 4 grand.

I've never owned a Suzuki before. Is this low-speed vibration just in the general nature of the beast?
 
Check your tach cable, I recently had a weird buzz and such as well, tach cable had come loose, I lubed and tightened it. I don't recall if I could feel it through the gas tank though.

I'd also check all other cables and any nuts and bolts for looseness, try and eliminate the basic things first.
 
I had a buzz through almost the same RPM range - the cam chain tensioner needed to be rebuilt. Location sounds about right too. Just one of several possibilities, of course. The handle on my tensioner would visibly vibrate through the affected RPM range with the bike on the stand. Don't touch it with the bike running!
 
A buzz, is it both heard and felt or just felt? You have one of the rare one year only bikes with the same engine as the 80E, plenty of parts for them, but not for things like the exhaust.

The one thing that comes to mind for you is check the sync on your carbs and a little pilot circuit adjustment might help as well.
 
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