I did this too when removing the tank. I was surprised afterwards at how long it took to drain the gas, one side at a time.

When I reinstall, I will likely use some lubricant on the rubber gasket. I've heard of a diluted soap solution, maybe isopropyl alcohol, maybe just water...

 

I bought a cheap siphon from home depot and got most of the gas out first.
Then with the vise grips still attached I put the tank over the gas can, removed one and drained that side, then the next side.
Most of that went in the gas can, not all, but it was a lot neater then I imagined it being.

 

I drained one side at a time as well. Most of the gas ended up in a can, and I think now, into my snowblower!

I only had a little bit spill, but it was better than it spilling all over the bike...

 

It was kind of funny, it would stop coming out and I would go to lift the tank and more would come out.
I thought it would never end LOL.

Not a drop on the bike which was good.
Now if I didn't lift the back too high and scratch the rocker it would have been a 100% successful job. I did forget to remove one wire while lifting but that was easily resolved.
Oh well, I'm in no hurry. It's cold, windy, rainy nasty weather in Maryland so I have time...

 

Try a rattle can full of clear silicon...( the kind used to lube windows and car door rubbers..
make things slip right on , and off...then goes away with no stain/residue

 

Aaah, I did have the needle nose that I used but never thought of the vise grips!!

This forum proves its worth for this noob everyday! Another great tip learned, thanks blksoftail!

 

I used to use that stuff when I installed auto glass.
The kind that uses the big rubber gaskets and a rope.
I'll have to find some. Great tip, thanks!

 

Since I used to do auto glass I have all the tools from those days.
One invaluable tool is the long bar that a razor blade attaches to the end.
That is what I used to cut the rubber hose.

My normal utility knife couldn't get in there very well.