2009 HARLEY-DAVIDSON FXDB Fuelpropulsion System Problems

WHEN THE MOTORCYCLE IS PARKED AND THE AMBIENT TEMPERATURE BEGINS TO RISE, USUALLY AROUND 80 DEGREES F AND UP, THERE IS A STEADY DRIP OF GAS FROM THE TANK OVERFLOW TUBE. THIS OCCURS WITH THE FUEL LEVEL AT FULL, 3/4, 1/2 AND SOMETIMES EVEN LOWER. I HAVE TAKEN THE BIKE IN TO THE LOCAL HD DEALERSHIP(04/30/2013) AND THEY REPLACED AN ANTI-SLOSH VALVE AND FUEL CAP AND INSPECTED THE OTHER COMPONENTS ON THE BIKE WITH NO IMPROVEMENTS. READING ON VARIOUS FORUMS THIS ISSUE IS NOTED SEVERAL TIMES WITH NO SOLUTIONS NOTED CURRENTLY. I HAVE CONTACTED HD CUSTOMER SERVICE(05/06/2013) AND WAS TOLD TO TAKE THE BIKE BACK INTO THE SHOP FOR TESTING. I HAVE ENTERED A DATE OF MARCH 1 FOR THE FIRST OCCURRENCE, BUT, THIS MAY HAVE BEEN HAPPENING FOR A LONGER PERIOD OF TIME AS I HAVE ONLY BEEN ABLE TO MONITOR IT WITHIN THE PAST COUPLE OF MONTHS, ALTHOUGH...