2011 HARLEY-DAVIDSON FLHTK Steering Problems

2011 HARLEY DAVIDSON ELECTRA-GLIDE ULTRA-LIMITED (103CU), BOUGHT NEW JUNE 2011. REPORTED TO DEALERSHIP THAT, THE FRONT END SHAKES VIOLENTLY WITH HANDS REMOVED FROM HANDLEBARS AT AROUND 30 TO 35 MPH. THE VIBRATION FROM THE FRONT END CAUSES THE HANDLEBARS TO SHAKE VIOLENTLY AND WITHOUT IMMEDIATE HANDS BACK ON THE BARS THE VIBRATION INCREASES TO THE POINT OF POSSIBLE ?LOSS OF CONTROL? OF THE MOTORCYCLE; THIS ISSUE WILL CAUSE SERIOUS INJURY OR DEATH TO RIDER AND PASSENGER. DEALERSHIP CHECKED ALL SPECIFICATIONS FOR FRONT END AND REPORTED NO ISSUES OUT OF TOLERANCE, BUT DID SAY THAT THE FRONT TIRE WAS SLIGHTLY LOW IN AIR PRESSURE, OTHER THAN THE AIR PRESSURE DIFFERENCE THE DEALER REPORTED THAT THERE WERE NO ISSUES FOUND. THE FRONT TIRE WAS NOT REPLACED OR REPORTED AS FAULTY AND THE VIBRATION CONTINUES TO THIS DATE, THE MOTORCYCLE ONLY HAS 3500 MILES SINCE NEW JUNE 2011. I HAVE RESEARCHED THE ISSUES...