Join Date: Jun 2005
Location: Conyers/McDonough, GA
More than likely it is functional or you would not have ridden that long after..
Put a piece of hose on the vent tube and then:: blown into it or suck fumes from it.
Look at the 2004 parts fiche for the fuel hose. The fuel port faces to the back so a 90 degree turn there.
Since 2003 fuel port faces engine it should go across and downward to the carb.
2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 193,834 VTX miles