Rushmore noises:
Another "whistle" I had was air coming in around the right side Juke box USB door. It drove me crazy because I could never pinpoint it. It only whistled above 40 mph. I finally pulled the fairing shell off and stuffed some foam rubber around the backside "pocket" and it stopped. My new M8 doesn't have that problem.
My air vent flap would "buzz" at about 50 mph+. A warranty replacement cured that-mine was warped and the airflow caused it to vibrate. Again, the M8 doesn't do that either.