So, I've had my Valkyrie for 3 years, and my CBR1100XX for 3 weeks. Not trying to start a firestorm here, but personally, I take issue with #46. I look over my shoulder before changing lanes on either bike or in my car. I was taught "Mirrors can only say, 'No.' " Valky riding position, upright, I can turn my head easily to see over the shoulder; with the forward-leaning position on the XX I have to let go of a handlebar and twist my body to see. No, I don't have a short/immobile neck; yes, when I ride without a helmet my peripheral vision looking over the shoulder is good enough to change lanes with confidence. I advocate helmet use, but let's face it, there is a loss there. The writer of these comments is solely responsible for their content, helmetless riders will go to H-E-double hockey sticks, your mileage may vary, etc.