Somewhere where it won’t be obstructing your field of vision, nor obstructing any other important instrumentation or motorcycle controls. Handlebar mounted phone holders usually fit nicely between the handlebar clamps, underneath your dash, or next to your left or right hand grips. The best place to attach your phone mount will depend on your handlebar layout and your personal preference. As long as it’s not blocking something important, anywhere should be fine. Use a bit of common sense and you’ll find the right spot to install your new device in no time.