I have the same buzz - and beaucoup vibrations, especially in the handlebars. My hands get nimb after half an hour. I think the engine was designed to have a ´rumble´ in it - that is what I have read. I have vance Hines pipes and the sound is fabulous. Everyone loves the sound, the look, and most non bike folks think it is a Harley. I have the reliability of a Honda and the feel and look of the HD. I am happy overall. But I think this vibration is going to get to me more on the long hauls. I will be looking for a solution especially for my hands - more foam in the handles??