I bought an 05 Vulcan 1500 FI last year and from my first fill up (on side stand) when I stand the bike upright gas spews from what I think is an overfill hole around the filler neck. It doesn´t matter if the bike is running or off, hot or cold. It stops only when I open the gas cap. I was thinking I was overfilling the tank but I can´t have overfilled it that much at any time. I once siphoned over 2 litres to get it to stop