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Manufacturer: DKW
Model: NZ500
Year: 1941
Displacement: 489 cc
Cylinder: 2
Engine type: 2-stroke
Bore / Stroke: 64 x 76 mm
Power: @ 4200 rpm
Top Speed: 115 km/h
Units:
Frame number: 553460
Engine number: 1121082
DKW was founded in Zschopau in 1919 by Danish engineer Jorgen Rasmussen and built its first motorcycle power unit, a single-cylinder, clip-on engine for bicycle attachment, in 1921. Designed by Hugo Ruppe, this 122cc motor was a two-stroke, and DKW would remain faithful to this engine type from then on, becoming world leaders in two-stroke design in the 1930s thanks to the prescient adoption of the Schnuerle loop-scavenge system. The latter used flat-topped pistons rather than the then-conventional deflector-crown type, relying on carefully angled transfer ports to direct the incoming charge around the cylinder. DKW was Continental Europe’s largest motorcycle maker at this time, manufa