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Resonant sound at low RPM's, belts maybe?

1169 Views 5 Replies 4 Participants Last post by  mike the snake, 
M
At maybe 3000-3500-4000 rpm's there's a resonant sound that comes and goes, definitely related to certain RPM's. I've reached down and tried to feel, I thought maybe the carbon belt covers might resonate, but haven't found what's making the noise.

Could the belts resonate like this if maybe the tension were off? Maybe something to do with the airbox? Airbox has been modified and is a little louder than stock.

Bike has 2500 miles, running great.
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TOP_DUC
Well, you obviously didn't chaek it out thoroughly. It's the blinker fluid tank. It is low on blinker fluid, so it vibrates.

All kidding aside, it is likely in the exhaust system. Check the catalytic converter...
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