Well it seems that link isn't working any more .. are there any other sources? does it work on Gen2?If you need a plug and play solution, look near the bottom of the following page for an adapter to use a heavy duty switch.
If you are comfortable with wiring, do your own to extend the wiring to a switch after separating a connector on a red wire near the positive battery post.
If you are very comfortable with digging into the bike, see Proper ABS on/off switch
It is for a 2009 but the wire color is the same, the mod only needs a light duty switch and ABS can be restored without turning the ignition off first.
EDIT: Never mind I found the answer.