The biggest thing will be fuel light since all the aftermarkets don't have an indicator led for one.
That's easy just install an LED in the top of your airbox next to your switches and wire it up to the low fuel indicator.
Think of the low fuel sensor like a simple on/off switch connected inline on the ground side of your LED/low fuel light.
When the switch is open (full tank) the LF light has no ground, so no illumination.
When the switch closes (low fuel) it completes the circuit and provides a ground to the LF light and it illuminates.
I think if you were to hook the ground side of your LED to the Light Green (low fuel sensor) wire at the cluster and the positive side of your LED to the Brown (meter illumination) wire at the cluster that it should function correctly.
Or if you wanted to test it without getting into the speedo you could hook the LED ground wire to the LF sensor where the Light Green is supposed to hook up, leaving the Dark Green hooked up to the LFS as it should be, and hook the positive wire from your LED to any 12V source on the bike ( like the positive post of the battery).
If I am correct there should be no light with the tank full and if you put a jumper wire across the terminals of the LFS you should get the LED to turn on.
I posted all of this because I know some other members have tried this in the past but I believe they had it wired incorrectly and it didn't work.
When I say LED I assume you are aware that any LED will need a resistor to reduce the voltage because 12v will blow the LED instantly without it BUT if you purchase an LED that is for use in a 12v system this resistor should already be installed on the positive lead of the LED.
I just wanted to clarify that before anyone gets on here and says that it needs one. Alternately you could use a regular filament style bulb but I suggest LED for longevity, especially being attached to the airbox and therefore the engine because the vibration would probably kill a filament bulb in short order.
Hope this helps... Keep us posted.