The carburetor vent hose has been confounding newbies since the earliest days of carburetor vents. However, just because most currently manufactured motorcycles don’t have carburetors doesn’t mean this question has gone the way of the dodo. No, it’s grown to accommodate battery and gas tank vent tubes or airbox drains. If you’re a neophyte who fell for this, take heart. At least, you were looking closely at your motorcycle.