Are you sure it's the front wheel? I had similar symptoms last year. The squeaking noise apparently coming from the front end seeming to be in rhythm with the wheels spinning. I was dead certain it was either the brakes or something rubbing on the front end. It was not. It was the rear wheel bearing going south. The squeaking noise would get louder as I accelerated, and quieter as I got off the throttle. At times it seemed to disappear completely. Then...
...riding up PCH on a mellow day trip to Santa Barbara from Van Nuys to have lunch on my 2009 C-14 with 19.5K on it. Just before Summerland I start hearing "CLUNK CLUNK CLACK CLUNKITY." Coming from somewhere, and I think I feel a slight vibration. So many tar strips, rough section, don't know if it's me or the road. I pull off the next off ramp. Yes, it's me. Very slight vibration and an oh-so-faint wobble. Drive up and down the side road. Stop, get off check all over. Looking for something rubbing or hanging off, because that's what it felt/sounded like. Nothing. No smell. Limp it into town, CLUNK CLUNK CLUNK. Call a tow truck. Find a local dealer. Have lunch. Mechanic at the dealer thinks it is coming from the rear end. Says it's serious. Take the train home.
A few days later, phone call. The rear wheel bearing has failed. Fortunately, covered under warranty. Picked it up yesterday. Several balls in the bearing are completely missing. Rubber seal messed up.
As to the probable cause... The dealer suspected that when I had the rear tire changed because of a flat a few months earlier, the tech had over torqued the rear wheel axle. The tire was replaced at a Honda shop that was not an authorized Kawasaki dealer. The Kawi mechanic said the Concours is the most sensitive bike on the road to torque specs. Just a little bit off either way, especially on the axles, and you can have problems. That could be a bit of a stretch, but something caused the rear bearing to fail. Either that, or Kawasaki is using some very substandard bearings.
So even though it sounds like it's coming from the front end, it may very well be coming from the rear. And there's no cure except to replace the bearing. My rear bearing looked about as bad as Kwikasfuki's. It was completely covered by the warranty, BTW. And there's no such thing as an idiot charge.
