SUNBEAM SPORT – year 1938
Manufacturer: Sunbeam Cycles Ltd., Birmingham, Anglia.
Sunbeam motorcycles first appeared in 1912 year and thanks to a well-thought-out design, good quality materials and very careful workmanship, they soon won a leading position among English producers. This place was achieved thanks to the successes in acute, sports competition with competitors. Sunbeam motorcycles have competed in the toughest races and competitions. Have won the Tourist Trophy in the years 1920, 1922, 1928 i 1929.
The illustration shows the Sunbeam Solo Sports Series 1 with air-cooled single-cylinder engine with a capacity of 500 cm3 (with an overhead valve 2 x OHC). This engine has a compression ratio 9,5 gaining power 16,9 kW (23 KM) at 4500 rpm. It had a magneto-type ignition system, dry sump pressure lubrication and special "sports"” (limiting power losses to a minimum) exhaust system. Drive from the engine to dry, multi-plate clutch was chain transmitted, housed in a light alloy casing. Four-speed gearbox, foot operated, it was placed separately. The rear wheel was driven by a chain. Sunbeam Solo Sport had a single tubular frame and front suspension with trapezoidal fork and central coil spring. The rear wheel was not sprung. High unit power, with a relatively low weight of the motorcycle - 140 kg, made it possible to obtain the maximum speed 150 km/h.
W 1957 In the next year, the production of motorcycles was stopped at the Sunbeam label. The last one, The model produced here was a motorcycle of unconventional design with a longitudinally placed in-line two-cylinder engine.