Softcover - 144 pages - BSA Pre-unit Singles 1954 - 1961 Haynes Owners Service & Repair Manual covers the following Models: * BSA B31 ohv single 348cc 1954 - 1959 * BSA B32 Competition Model 348cc 1955 - 1957 * BSA CB and DB 32 Gold Star 348cc 1954 - 1957 * BSA M20 side-valve single 496cc 1954 - 1955 * BSA M33 ohv single 499cc 1954 - 1957 * BSA B33 ohv single 499cc 1954 - 1960 * BSA B34 Competition Model 499cc 1955 - 1957 * BSA CB, DB and DBD 34 Gold Star 499cc 1954 - 1961 * BSA M21 side-valve single 591cc 1954 - 1961 Contents: * Maintenance * Engine, clutch and transmission * Fuel system and lubrication * Ignition system * Frame and forks * Wheels, brakes and tyres * Electrical system * Wiring diagrams