Check your tires for cupping. Just guessing from what you've posted, but sounds like you hear a roar (hum), & get a mild vibration on turns, or possibly anytime you're not perfectly vertical. Big bikes tend to cup the tires towards the edges & when you bank the bike they hum (roar). Let us know what you find.

 

Interesting, the front tire is new, but the rear is in need of replacement and does appear to be cupping or feathering on the edges.