The BSA M20 is a British motorcycle formerly made by Birmingham Small Arms Company (BSA) at their factory in Small Heath, Birmingham. Although initially viewed as a near failure by the War Office in 1936, the M20 evolved into one of the longest serving motorcycles in the history of British military motorcycling, as well as becoming the most ...

2018年11月22日 · The M20 started out with hand-change gearbox, with the lever on the right, a rigid frame and girder forks. The bottom end design was common across the BSA range of singles, being used on both their M range of side valve and OHV heavy duty motorcycles and the lighter weight B series, including the famous Gold Star.

2018年5月25日 · 1941 bsa w-m20 When first reviewed by the British Government’s War Office in 1936 the BSA M20 was thought to be nothing short of disaster. British motorcycle magazine Motor Cycling’s tester reached only 69 miles per hour and cited 56 miles per gallon, and early on there were cylinder wear problems.

2021年7月14日 · Designed to be simple, rugged and reliable, the M20 was a side-valve (flathead) 500cc air-cooled single with a cast-iron top end. It had a rigid frame and BSA’s pre-war girder front end. Everything on the bike was extra-heavy duty for military use.

With so many examples produced, the BSA M20 is a common machine today, although few retain their correct original factory specification, especially the early wartime or pre-war examples. During the course of the Second World War and throughout the post-war period, virtually all M20s were rebuilt by the military at least once, if not several times.

Most BSA M20 motorcycles were used by the British Army but the Royal Navy and the Royal Air Force also commissioned M20's from BSA. Designed as a general-purpose motorcycle for convoy escort and dispatch use, the M20 saw action in almost every theatre of war.

2016年1月14日 · The BSA M20 was one of the most successful models produced by the British brand, being used also by the British Army throughout World War II. It had, at its heart, an air-cooled, four-stroke,...

2025年1月15日 · The M20 was created by the new-to-BSA Chief Designer Val Page and was intended as a heavy-framed sidecar model with a simple 496cc air-cooled side-valve single producing 13hp at 4200rpm. The machine had low compression and plenty of low-end torque through a standard BSA box.

2021年7月14日 · The 1943 BSA M20 was part of BSA’s massive wartime contribution to Britain’s war effort. Designed to be simple, rugged and reliable, the M20 was a side-valve (flathead) 500cc air-cooled single. It had a rigid frame and BSA’s pre-war girder front end. Everything on the bike was extra-heavy duty for military use.

1937 BSA M20 specs, performance data, engine specifications, pictures.