Zündapp - EM Einheitsmodell
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Zündapp D2-492-37-13
Photo ou archives : F-M. Dumas

Capacity : 250
Model : EM Einheitsmodell
Production : 1925 - 1927
Category : (R) Street Bike


EM250 - 1925

The people's motorcycle

Zündapp, a former munitions manufacturer, began two-wheeler production in 1921. Their first model was the Z22, a 211cc two-stroke single-cylinder utility "people's motorcycle," which nevertheless had separate lubrication, operated by a hand pump. The Z22 and the Z2G sports (identical, but with two-speed transmission) were produced until 1924, when the K249 appeared. It was the first chain-driven Zündapp, and the "K" stood for "Kette" ("chain").

Standard Model

In 1925, the K249 was in tum replaced by the EM 250. Dr Fritz Neumeyer, head of Zündapp, was anxious to produce a "consumer durable" backed by an efficient service network, and the name of the new machine signified "Einheits Modell" ("standard model").

Mechanical Lubrication System

Its sole technical innovation was the introduction of a mechanical pump for the separate lubrication system. The EM 300 – identical apart from a bigger bore – even had a variable-output oil pump. Production lasted only three years and ended in 1928. If the 28,000 units built represented a notable success, it has to be said that it was mainly due to the depressed economic situation. The Depression favored the sale of low-priced two-wheelers, regardless of any particular virtues of the EM, even though it was a modern lightweight of unrivaled reliability.


Engine: 249cc (62x82.5 mm) air-cooled single-cylinder

Power Rating: 4.5 hp @ 3100 rpm

Valves: two-stroke

Fuel System: carburetor

Transmission: 3-speed, chain final drive

Suspension: girder forks (front); rigid (rear)

Brakes: drum (rear)

Wheels: 26x2.85 inch wire (front & rear)

Weight: 187 lb

Maximum Speed: 50 mph

Production of the EM 250 totaled 28,000 between 1925 and 1928, when it was replaced by the Z200 following a change in the law exempting motorbikes under 200cc from road tax.

Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at info@moto-collection.org for conditions and copyright.

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François-Marie Dumas

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