CA-Cycleworks has pretty good directions on how to do it.
http://www.ca-cycleworks.com/media/h...ion_Manual.pdf
USING THE FUEL PUMP TO DRAIN THE TANK (Optional)
Note: If you are not the adventurous type, you should leave this to the professionals. Some people, however, have to touch the electric fence just once to see what it’s like. This is one of those kinds of situations.
The relay closest to the metal bracket is the fuel pump relay.
It is continuously supplied +12V from the battery. It does not turn off with the keyswitch! This is always “hot” and is part of the reason the first instruction you read in about everything vehicular is to disconnect the battery! The way the fuel pump relay works is that when the ECU wants the fuel pump to run, it applies a connection to ground at the brown/black
wire. Should someone jumper this connection directly to ground, the pump will engage, regardless of what else the motorcycle is doing.
A person could route a large hose from the OUT fitting on the fuel fl ange to a fuel container, and the pump will empty the stock tank in under a minute. You will hear when the tank is empty by the change in sound from fuel pump.
It's also in the video
http://www.youtube.com/watch?v=v9_TB...layer_embedded