Sounds like you are talking about vent tube. Its there so you dont get a vacuum effect when fuel is sucked up the mainjet or pressure from fuel flowing in the floatbowl. Dont think you can siphon thru it. I would turn off gas and let carb run dry till it dies when you put the bike up this will help with the buildup in the float bowl. just remember to turn gas back on when time to ride again.

 

Yep, a vent. It's also where your piece-o-crud came from.[img]i/expressions/face-icon-small-wink.gif[/img]