It kind of sounds like there's a bad vibration that is causing this sound....but the bike is smooth as butter.
Below 1800 or so and above 2500 approx. the sound isn't too bad, but in that range it's nearly unbearable.
Tried it with and without the shield, with and without earplugs.....there is a little change but still not enough to make much difference.
I have a 2017 FLRT with Harley shield (tall one I think).
I'm concerned this may be some sort of harmonics thing, unique to my ears...
Is anyone else dealing with, or ever run across such a thing?