I have started noticing some odd sounds and vibration coming from my bird. The vibrations are under power and are around a specific RPM range (1800-2200). As for the odd sounds they occur when doing a tight right hand turn at a very low speed (5-7mph). Some months back I had noticed a strange wear pattern on my rear passenger brake rotor that was caused by the center nut in the hub area being loose, this has long since been repaired (and was repaired very quickly after noticing the problem). Any ideas would be appreciated.