I didn't wire it to the bl/wh directly but used it as power source for a relay wired as a latch. Then added a hidden momentary on pushbutton sw as trigger and a hidden LED that reflects off the chrome to indicate power on. This provides fuel security against theft / hijacks, as well as safety if you crash. Fuel is on until you hit the kill, turn off the ignition, or the rollover relay cuts the power. The pushbutton must be pressed shortly after turning ignition on, either before or after starting. If you get hijacked, hit the kill, tell the perp to hit the starter. He will be out of gas in a mile - while you dial 911 and tell the cops where the perp will be sitting on the side of the road on your stolen bike. I have wired both Deerslayer and Jade this way, and George is soon to be the same. No problems.
Probably a good idea to add another fuse - wouldn't hurt, could help in the event of a short.
See
http://www.horseapple.com/Valkyrie/Tech_Tips/Fuel_Shutoff/fuel_shutoff.htmlHere's BonS diagram on wiring a latch relay:
