Noise diagnosis over the net ain't easy, but guys, there's only a limited number of things it could be. Could just be road noise, could be bearings (unlikely), could be brake pads not retracting fully or it could be the speedo drive bevel gear (my bet).
Have you tried lifting the front up and spinning the wheel by hand? If it doesn't spin freely it could be bearings or brake. To rule out brakes, go for a good ride (several K's) and stop without touching the front brake. Now (carefully) feel the disc. Is it hot? If not, it's not the brakes. Finally, take the wheel off, remove the speed drive, then repalce the wheel and see if the noise is gone. It may be best to do this on rollers rather than riding - I don't know if the speedo drive on your bike forms part of the front axle support - try it at a race meeting, there is bound to be someone with rollers who will oblige.
Good luck
ACC - It's where the Enron accountants all went.
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