Pretty near have to remove the main fairing to get to the horns. When you do that, busting the grill out (to get to the horns) is moot.
Removing the main fairing is a five minute job, once you've done it a few times. Remove middle fairings, the inner pocket fairings, the windscreen, the dash cowling, the mirrors. Remove (twist out) the turn signal bulb socket assembly, remove the main fairing.
#2 and #3 phillips screwdriver and a 10mm wrench is all you need.
Rick