SFM Junak

The Junak is a Polish motorcycle with four-stroke engine.


This motorcycle was produced from 1956 to 1965 in a number of pieces of a total of 91,400 and exports, among others in the United States, Turkey, England, Italy, Finland and even to Egypt, Cuba and Iran. There was the model M07 (approx. 11,000 ) and the successor model M10 (approx. 58,000 pcs). From the M07 model, there was also a rally version M07 -R and a cross version M07 -C ( 5 hp more power). The first built 1960-1961 M10 (about 20,000 ) still had some features of the M07, such as the casing from the front headlights. In Polish, these models are also called " przejsciowka ", or " transition models ". In addition, there was the type B20 (about 2500 ), which was a load tricycle. In order to satisfy the Beiwagenkundschaft, also matching sidecar called WB1 and W03A (about 8500 pieces) were produced.

The Junaks have won at a variety of international races and so put their practicality and durability of the test. Among other things, achieved driver with a Junak Gold at the International Six Days in Garmisch -Partenkirchen in 1958, silver at the Six Days in Bad Aussee ( Austria ) 1960, Gold at the motocross race in Busch (Austria ) 1961, 3 silver medals at the six- day trip to Llandrindod (England ) 1961 and Gold at the Six Days in Garmisch Partenkirchen 1962.

The motorcycle was (formerly Stoewer plants) were built by the SFM ( Szczecin motorcycle factory ) in Stettin, with the motor of ZSM in Łódź was built. This bike was purely Polish self-development and not, as often claimed, a license built by an English motorcycle. Was constructed the bike 1951-1952 in the Warsaw office construction Biuro Konstrukcyjne Przemysłu Motoryzacyjnego ( design office of the automotive industry ), headed by Jan Ignatowicz. It surpassed many a design by renowned world-renowned motorcycle manufacturers of the time. This is not surprising, as the experienced construction team at the excellent construction of the Polish pre-war motorcycles Sokol ( Falcon ) oriented. Therefore, some of the similarities Junak engine with the engines of the 500 and 600 come Sokol

The bike was very expensive for former Polish standards but "better" than the two-stroke competition from Czechoslovakia. It was a very popular and reliable bike that enjoys cult status today. It is often referred to as Polish Harley -Davidson, as the noise of the exhaust system of this motorcycle already announced from afar. Ultimately led to the collapse of the motorcycle market to the final production stop in 1965.

Specifications Junak M10


  • Type: S03; Four -stroke single cylinder ( OHV )
  • Displacement: 349 cm ³; Bore × stroke: 75 mm × 79 mm
  • Power: 14 kW (19 PS) at 6000 rpm
  • Maximum speed: 125 km / h
  • Transmission: 4-speed
  • Dry weight of the motor with gearhead 63 kg


  • Frame: Steel pipe frame
  • Wheels: 3.50 x 19 "

Electrical System:

  • Alternator: DC Lima type P9a, 6 V, 45 W
  • Controls: Type RG9a, 6 V, 7.5 A
  • Ignition: magneto ignition (identical to AWO 425)


  • Length: 2172 mm
  • Width ( Handlebars ): 730 mm
  • Height: 1020 mm
  • Empty weight: 170 kg
  • Permissible total weight: 382 kg