I've had mine for two months. Bought it used with about 2500 miles on it and it now has just over 5000. Runs great with no issues but makes a howling - ringing noise while running down the road. It's hard to explain but it's made this noise since I bought it. It's almost like a hum resonating from the engine area. It does not increase as the RPM increases. I commute 86 miles a day with 70 miles of it crusing 75 - 80 MPH on I95. I hear it while commuting or while tooling along on trails at 10 MPH.
My 1150GS made a lot of noise (compared to my other bikes) but ran flawlessly the entire time I had it. Could this be the same? Anyone else notice this type of noise?
BTW: Running Pirelli Scorpions and full Remus exhaust if that helps.