My regulator is mounted on the Airbox eliminator unit at the bottom but in front so it is protected from water/rocks etc, but its still wide open around it for cooling. The horn mounts using the stock bracket to 1 of the holes left over from the AI mount - just angle it to fit above the cam cover. The stocker gets really weak under the tank so I have replaced mine with 1 of those 125 decibel jobs and faced it down /forward to hear it better.
Heres the regulator mounted above the swingarm looking in from where the right side cover would be.
