I just bought an '02 ZX6R with 4k miles four days ago. The bike runs great and it appears that the owner has taken excellent care of it. Though, there is a problem that has me very concerned. Once I get going, at around 20ish on up, I hear this whining noise coming from around the tranny area. The pitch/loudness of the noise seems to be dependant upon the speed of the gear. It only makes noise when under load, acceleration, etc. It doesn't happen if I just rev the motor at a stop, so I know it isn't from the engine. The noise sounds like the whine of a supercharger on a car or the sound of a manual trannied car that is backing up. I lubed the chain today, but that didn't help. I most fear that it is coming from a bearing or something in the tranny. This is my first streetbike, so maybe it is something I am just overlooking. Any ideas?