[2][3] Harrison started his career with the Belle Vue Aces in 1929 and stayed with them until the outbreak of World War II in 1939.

[5] Harrsion was in the Aces team that won the National League championship four times in succession from 1933 to 1936.

In 1937, Harrison while riding for Belle Vue Aces, broke his left leg on the same night that teammate Stan Hart (who was riding for Belle Vue Merseysiders in a Provincial league match) was killed.

[7] After the war Harrison was allocated to the West Ham Hammers by the Speedway Control Board.

After one meeting for West Ham in the 1949 season he transferred back to the Belle Vue Aces where he helped them win the National Trophy.