Originally Posted by
wjduke
In all seriousness, I question the shape of my head, and I look halfway normal I'm pretty sure! I have a Shoei RF1200 that causes a harmonic hum at 50-60 mph only. No one else seems to have this problem. It may be that you have to keep trying different ones until one feels right. Cycle Gear has many on display last time I was there...maybe worth a trip.