AJS Model 20 - Vertical Twin

British motorcycle made by Associated Motorcycles at the former Matchless works in Plumstead, London. The Model 20 was finally discontinued when the 646 cc AJS Model 31 replaced it in the autumn of 1958. Production 1948–1958 Successor AJS Model 31 Engine 498 c.c.O.H.V. air cooled Vertical Twin Top speed 85 mph (137 km/h) Transmission Four speed gearbox to chain final drive Weight 179 kg - dry Year of construction 1954