Right now, after just over 20K miles, I started hearing same thing. Brakes work fine, no squeal, no grabbing, plenty pad left - works fine. But I get this rubbing sound at 30-50mph. Especially noticable when passing wall/concrete barrier or parked cars. Quiets when I hit brake. Brought bike to Yamaha dealership and had to pay for them to check it out. Two different mechs rode it and they say it is just the noise of the pads rubbing the rotor, which Yamah notified them about berated [sic] pads. Is there something I could spray to the pad or brake mechanism? Maybe the barke is not retracting?