[mike the snake]

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.

 

[romer]

Loose muffler bearing.
Tighten it up and the sound will cease.

Romer

 

[mike the snake]

Already checked the muffler bearings, doohickies, humdingers, and flux capacitors.

 

[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...

 

[Mike_1324]

I have seen belts vibrate in a GT1000 DS like you mentioned. at steady lower RPM there was a vibration, and on releasing the throttle from that RPM. It appeared that the front cam was quiet tight in the head with lots of drag. it was putting load on the belts.

Have you changed belts recently? do your cams turn freely in your heads?

Mike

 

[mike the snake]

The bike has 2500 miles on it. I haven't had anything apart yet, so I don't know about the cams spinning freely or not.

The bike runs great, I just notice this noise at a certain rpm.

I may pop the belt covers off and see.