David,
The fairing is easy to pull off... there are two 8MM bolts that secure two mounts attached to the upper triple tree that require a universal joint, 6" extension and a ratchet to remove, at least that is how I do them. You can probably use a 12MM (could be a 13MM ) ratcheting box wrench to pull them.
Next, a single straight slot, broad head screw at the bottom of the fairing.
When you pull those three off, hang on to the fairing, pull it forward and reach in and unplug the directional wires... set the fairing aside.
The ignition cylinder can be accessed by pulling the rubber cover up on the dash, it is held in place by a couple of tabs under the dash, that is all I can think of to call them, they capture a metal tab under the dash that is part of the gauge panel.
From there you should be able to unscrew the ignition cylinder securing ring and pop the switch out through the bottom of that panel.
If it does not push all the way through, there are only two bolts holding the panel, pull those two and tip it back and then you will have full access to pull the switch.
Make a diagram of the wire layout before you pull them off.
How are you so sure that the switch is bad...?
Best,
Rob