Okay since this is a TWL thread now I'll add my on topic comments.
When I removed the tank to paint my bike, I had to remove the fuel. I removed the allen head screws that hold the filler cap on, and slid the end of a siphon as far down towards the seat as possible.
Once the fuel is removed, there will be a fair bit left at the bottom of the tank. I didn't find an easy way to remove this fuel without spilling it everywhere. I took off the fuel pump and held the tank over a wide bucket and just shook the thing like crazy for a couple minutes. Gas is volatile enough that the rest evaporated before I started any work on the tank.
A couple notes for removal:
1) remove the breather hoses and leave them on the bike, this makes it easier to reinstall the tank when it's time. I found I only had to pull the tank up to about a 45 deg. angle before I could get in with pliers to remove those hoses.
2) I had a fair bit of fuel spray out of the line when removing it from the tank.. it would be beneficial to have an absorbent spill pad under the tank to catch the drips and prevent them from getting all over your electronics
3) it would be a good idea to wash everything with soap and water after removing the tank, I'm not sure if gas will dry out rubber hoses/seals, but I know it's not great for the paint on the tank, and soap and water will help get rid of that gas station smell!
