Anybody else have a bit of a hum coming from your front wheel bearings? Bit over 2000 miles on the ODO, I snugged up the axle but it's still humming. It didn't used to be so obvious. It's most noticeable when idling down, if I pull the clutch and roll at about 45 I can hear where it's coming from, since it doesn't drop with RPM's. Wheel spins freely and has zero play on the bearings, but I was wondering what the expected life on the bearings is. I'll probably get another 1000-1200 miles or so on the rear tire, so I may just swap the bearings when I get new tires.
Check the tread on your front tire. On all my street bike the front would eventually get noisy from the tread feathering. The harder you use the front brake to stop the faster it will happen and it will make the front tire hum.
These are the stock Pirelli Diablos with a zig-zag groove down the middle, but not much other siping in contact with the street in a straight line, and no feathering that I can see...
It's a possibility, but why would it be so much more apparent recently than in the first 1500 miles? I know the hum of the rotor when you get on the brakes, but it always goes away once you let off. This is constant and doesn't go away when I'm on the brakes, I can hear it at the same time as the rotor hum.