Bruce Sass started motorcycle racing in 1969 with the Sports Riders Association of Colorado. By 1972, he had had won state championships in both moto-cross and flat track two years in a row. He won three Mountain Racing Association championships in 1975, 1976 and in 1984 on road courses. In 1984, he had 48 wins and 12 second places in 64 starts. In AMA road course racing, he was the 1977 novice national champion winning two 250cc nationals.