Just got back from a long trip to the east and have a rhythmic whine at low speeds. Normally feeling and hearing it in second gear between 15 and 25 mph. It doesn't make the noise when accelerating or slowing down, just when you are holding a steady speed. I am not hearing any clunking sounds and can't replicate the sound when on the center stand. The noise quits when the clutch is pulled in, so I am thinking it is not a wheel bearing. All seems good there. Any idea what I might be hearing and feeling. Everything seems normal when riding at highway speeds.