You would have to turn the choke on right when it starts sputtering. This would shut off most of the air and make it suck most of the fuel out of the bowl. Not sure how it would work on the newer CV carbs. They don't have an actual choke.with that style carb. i dont think it makes enough vacuum to draw the carb bowl completely dry.
All of my pump-gas goes into a 5-gallon jerry-can.What do you use as the pre-filter?
You do ALL THAT for each drop of fuel that goes into the T-dub? Man, if I had to do that, there'd be one T-dub for sale almost immediately! Life's waaaaaaaaaaay too short to have to work that hard just to fuel a small motorcycle. But, whatever works for you is all that's important.