I had that happen a couple of times, both when I still had the original Bridgestone tires, which were recalled. Since you have a 2010, you don't have those tires.
Several things can contribute to the problem. You've checked tire pressure, and assuming the bike was assembled correctly I doubt you have front end component issues. Road conditions may contribute, but remember you're riding a bike that really isn't designed for high speeds. The windshield and bags don't exactly make for a stable high speed machine.