first put my zumo 660 onthe top bar above the clocks hard wired to the battery. went for a ride and thought there was to much vibration so moved ot to the middle of the bars. last week changed my mind and moved it to the top bar again this time with the standard ram mount and putting a bicycle inertube round the bar first then on top of that i put some foam off a handle bar pad,went for a test ride not so much vibes now.