From Wikipedia, the free encyclopedia. Mert Lawwill is an American dirt-track and road racer, born on September 25, 1940 in Boise, Idaho. He started his racing career as an amateur racer on the local TT track in Boise and, later, scramble races across the United States Northwest . He turned professional in 1963 after moving to California and, in 1964, signed a contract to race dirt-track for manufacturer Harley-Davidson, with which he would stay for the rest of his racing career. He won his f ...