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Puch S4

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Steyr-Daimler-Puch 250cc motorcycle from 30's. The vehicle has been restored (more information). S4 model was built from 1934 to 1942. Until 1938 about 7600 units were made. Later the production number is unknown. Engine: 10.5hp/4100rpm, 1-cyl, double piston 2-stroke 248cc. Four-speed gearbox. Power output: 10,5 HP, top speed: 110 kph, weight; 128 kg. Fuel capacity: 13 L. Fuel consumption: 3.1 L/100km, oil - 0.25 L/100km. S4 was painted black, no color versions were offered. In 1935 leather saddle was replaced with rubber one. In 1937 flat fishtail ended exhaust was changed to round fishtail ended exhaust, with stamped Puch logo. In 1938 fork was enlarged, and one of two toolboxes removed. In the time of model production there were also small changes in headlights (first Bosch headlights were used, then Siemens) and speedometers (various types of Veigl speedometers were installed). The price of the vehicle was 1580 Austrian shillings.

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S4 engine

"The motorcycle part of the Austrian Steyr-Daimler-Puch combine, Puch introduced its first motorcycle in the early 1900s; amalgamated with Daimler in 1928 and then Steyr in 1934. Puch also built cars, commercial vehicles and railway locomotives in its early years, but these days the firm is best remembered for its pioneering ‘split-single’ two-stroke motorcycles, the first of which was developed in the 1920s. One its most popular and successful such models in pre-war days was the 250cc S4, which was also available in racing form. Offering an ideal combination of power and economy, in its final form the split-single engine featured tandem cylinders whose pistons were driven via a single connecting rod. Four-stroke models were catalogued during the Thirties, but after WW2 Puch built two-strokes only, commencing with split-singles in 125, 150, 175 and 250cc capacities built in both tourer and sport guises. Cycle parts were conventional for the time and featured plunger rear suspension and twin ‘swing’ saddles. Updated in 1954 with revised engine and a swinging-arm frame, Puch’s split-single range remained in production well into the 1960s..." from bonhams.com

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