Following my fall 3 weeks ago, I finished repairing my bike. I replaced the fairing, repaired the headlight and straightened the handlebar.
I took the opportunity to install a Ohlins steering damper and I also installed two bi-xenon headlights. I had to remove the headlight modulator since those are incompatible with the inverters used with the HID lights.
I took the bike for a short ride in the neighborhood and it felt good. I am not quite ready for a long ride because my back is still hurting but that also is getting much better.
The issue of bi-xenon is interesting. There are at least two different types of bi-xenon upgrade kits. Both use one bulb for both low beam and high beam. You will see some upgrade kits advertised that have one HID bulb for high beam, and a regular halogen bulb for low beam. Stay away from those, they cost as much as the bi-xenon but you only get high beam in HID mode.
The more common type of bi-xenon kit, at least the most commonly found on eBay or Amazon (like used as OEM equipment on most cars) uses a small metal flag rotated by an electromagnet to block part of the beam in low beam mode. In high beam mode, the flag rotates out of the way and all the light goes out. The problem with this type is that it requires a significant modification of the headlight assembly because the solenoid is part of a projector assembly that goes inside the headlight which has the be opened up.
The type I am using also uses a single bulb, but the low beam/high beam selection is done by moving the bulb horizontally. This is done by an electromagnet installed in the lamp holder. This system does not require modification of the headlight, you simply replace the H4 bulb with the HID bulb holder.
The specific type I bought is rated 55 W. The brightness is unbelievable.
If you ride at night, I recommend doing that modification.
Since most HID systems are intended for automobile use, you may have to work to optimize the wiring so that you do not have excessive wire looms behind the fairing.
I installed the inverters behind the dashboard under the fairing, so they are completely out of the way.
If anyone is interested, I can post pictures (I was done too late today, it was dark...)