BSA M20 - Civilian Versions

Civilian Versions

The BSA M20 was a reliable and affordable form of post war transport, so BSA repainted the khaki WD models black and they became particularly popular as a sidecar motorcycle. The Automobile Association placed a large order and their yellow and black M20 combinations became a familiar sight on British roads. The 1945 wartime cast iron engine continued in production until 1951, when an alloy cylinder head was introduced but otherwise it remained largely unchanged. Spares began to become harder to find in the 1950s, however, and the simple design was overtaken by modern twin cylinder motorycles, so it was discontinued in 1956 — but the 600cc M21 went on until 1963 when it was also discontinued.