If you do a lot of night riding, you will want some extra lighting to help. For as little as $40 you can pick up a small set of lights to add underneath the nose, as I've done. Installation is very simple - only some simple wiring and soldering is required. But choose your product carefully - you should look for lights that are no more than 2" in diameter so that they will fit under the nose and not interfere with the front wheel on extreme left or right. Because of this size limitation, I've not found any other more powerful lights yet for my GSXR. You can certainly find much brighter lights, but it's really tough to find them small enough for the GSXR.
I won't include an exhaustive list here. You'll find many many choices if you do an internet search for "Driving Lights" or "Fog Lights". Your first concern is really size of the lamps, because if they are any larger than 2" diameter, they will knock into the front wheel on extreme left or right turns.
The wattage is not extremely important - it's surprising that my cheapy lights have only 20W per lamp - that's 40W total, and yet they really do add a noticeable improvement to my night visibility. In fact, on a totally dark road, you can turn your headlights off and still see the road using only these lights. I don't recommend that, but my point is that even with a 40W addition to the stock headlamps, you'll have an improvement in visibility.
I don't know how high you can go in additional wattage before you might exceed the working capacity of the Gixxer's electrical system. But just be aware that there is an upper limit to the power that the Gixxer can continuously supply to all your electrical accessories. Nonetheless I have upgraded my bike to include 100W headlamp bulbs X2 as well as these 40W (total) foglights, and in 5 years of use have never had an electrical failure nor a dead battery. How much higher than 40W can you go ? I don't know, but you proceed at your own risk...
Here are the cheapy lights that I installed. You can find them at any Pep Boys, or similar auto parts store.
These come with excellent instructions, and all the wiring, switch, and fuses that you need.
You can power the lights directly from the battery, but I don't recommend this, because that means that anyone can turn the lights on, even with the ignition off, and power the lights, resulting in a dead battery. Instead, you should power them with a "link to ignition". This means that you want the lights to get a power line only if the ignition is on. A clever way to do this is shown below : click for full-sized diagram.
Where do you find this brown wire? Look in the wiring harness, to the left of the battery box - this is the most convenient location to access it. Just carefully cut open the thick protective loom covering the wires, and strip off some insulation from the brown wire. This wire carries current only when the ignition is turned on, so that it makes a great way to control your switch, as shown in the diagram.
Here I've cut open the protective loom, using an exacto knife. Then strip off the insulation from the solid brown wire. I also stripped some insulation off the B/W wire - which I used as my ground connection.
After this, just make the connections as shown in the wiring diagram. Find a place to mount your switch. At first I mounted it on a switchplate as you see, to the right of the lighted rocker switches.
Later, as I needed room for other switches, I attached it to one of the brackets for my front fairing, just to the right of the speedometer. It's easy just to use one or two zip-ties to mount it in place.
It's not difficult to add a set of fog lights or driving lights, to get better illumination. Just be a little mindful not to go crazy and install 500W bulbs, or you'll start having dead battery problems. I can only tell you that using 40W total for my fog lights, AND using two 100W bulbs for my headlamps has resulted in no problems for me. Also get lights that are 2" diameter or smaller, as discussed above. Even lights that are 2-5/8" are just too big to fit under the nose without the front wheel contacting them at extreme left or right. Finally, takin a little extra effort to power your lightswitch from the brown wire instead of directly from the battery will guarantee that you don't accidentally leave these on when you park, thus draining the battery.