Classic Bikes Custom Bikes Individual Racing Bikes AJP AJS Aprilia Ariel Avinton / Wakan Bajaj Benelli Beta Bimota BMW Brough Superior BRP Cam-Am BSA Buell / EBR Bultaco Cagiva Campagna CCM CF Moto Combat Motors Derbi Deus Ducati Excelsior GASGAS Ghezzi Brian Gilera GIMA Harley Davidson Hero Highland Honda Horex Husaberg Husqvarna Hyosung Indian Jawa Kawasaki KTM KYMCO Laverda Lazareth Magni Maico Mash Matchless Mondial Moto Guzzi Moto Morini MV Agusta MZ / MuZ NCR Norton NSU Paton Peugeot Piaggio Revival Cycles Roland Sands Royal Enfield Sachs Sherco Sunbeam Suzuki SWM SYM Triumph TVS Ural Velocette Vespa Victory Vincent VOR Voxan Vyrus Walt Siegl Walz Wrenchmonkees Wunderlich XTR / Radical Yamaha Zero Video Technical
Complete Manufacturer List

NSU 501 SS

Make Model	NSU 501 SS
Year	1931 - 34
Engine	Single cylinder, up-right shaft 4 stroke, OHC
Capacity	494 cc / 30.1 cub in
Bore x Stroke	80 x 99
Cooling	Air/Oil cooled
Lubrication	Gear driven oil pump
Ignition	Magneto
Starting	Kick start
Exhaust System	Dual exhaust (single-port system on racing models)
Max Power	14.7 kW / 20 hp @ 4800 rpm
Compression	1:6
Transmission	3 Speed, pedal gearshipf
Final Drive	Chain in oil bath
Font Suspension	Spring loaded fork
Frame	Closed frame
Wheels	19 in, spokes, high pressure tyres
Rear Brake	Internal shoe
Dry Weight	165 kg / 364 lbs
Top Speed	100 km/h / 62 mph

The 501 SS Super Sport was produced in almost unchanged form from 1931 to 1934. It was the first series model designed by the new NSU chief designer Walter William Moore. Moore was recruited in 1929 from Norton in England where he had designed the upright-shaft engines that were employed so successfully in motorsports. Typical features are the standing 500cc OHC 1-cylinder engine with upright shaft, 3-speed gearbox with pedal gearshift, dual exhaust (cf. single-port system on racing SS models) and closed frame.