I've had some of the noise from my Avons but not until I had about 10k on them, once the center of the tire starts getting a little flat it seems they make a little noise when you get over on the sides. I've been using the max cold pressure found on the sidewall and not had any cupping since, I think the bike handles better too. My original Bridgestones cupped some and the pressures were kept at the Yamaha recommended pressures. From my experience cupping has been caused by under inflation.