Today in Motorcycle History

NSU 201 OSL 200cc OHV

Production: 1933-1939
Units built: 18,111
Engine: single cylinder four-stroke, dry sump oil circulation
HP: 1933-1935: 8.0 (4100 rpm) 1936-1939: 8.5 (5000 rpm)
Engine displacement: 198 cc
Cylinder diameter: 58 mm
Piston stroke: 75 mm
Compression ratio: 7.0:1
Valvetrain: OHV; two pushrods in one tube. This gives the appearance of a vertical bevel drive shaft to an OHC.
Carburetor: AMAL 4/017, GRAETZIN KE 20 or BING AJF 2/20
Transmission: 1933-1935: 3-speed, then 4-speed
Tyre size: 3.00-19"
Weight: 120 kg
Length: 2000 mm
Petrol tank volume: 11.5 litres
Top speed: 90 km/h
General information: closed and fully sealed cylinder head introduced in 1938 (until 1937 the valve mechanism was exposed)

Information supplied by Hartmut Schouwer