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 · Reliability and ease of maintenance, both critical on active duty, overcame being too heavy, too slow and too low to the ground. The British Army ordered the most M20s but both the Royal Navy and Air Force used this general-purpose machine for dispatches and escorting convoys in virtually every theater of the 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 …

Designed by Val Page the BSA M20 started development in 1937 as a heavy-framed sidecar model with a simple 500 cc single cylinder side valve engine. It had low compression and …

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.

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.

2025年1月15日 · The Army had a demand for motorcycles, and BSA stepped up with the M20. 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 …

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.

The creation of one of the British motorcycle industry’s most prolific and talented designers - Val Page - BSA’s new single-cylinder range debuted in 1937. Intended mainly for the sidecar man, the two biggest sidevalve models were the 496cc M20 and 596cc M21, both of which came with rigid frames, girder forks and four-speed, hand-change ...