4 th gear is gone.....Today I was on a benefit ride with 200 other bikes , just cruising along in fourth gear and the bike revs up like it popped out of gear . Now I got no fourth gear . No noise , no warning , just changed the oil last week . This one is going to hurt.... $$$$ ... Has anyone had this happen ? I searched but couldn't anything . 2005 hammer with 12,000 miles .