JAWA & yezdi Club, India - 1935 - Start of production of JAWA 250 Special motorcycle

1935 - Start of production of JAWA 250 Special motorcycle

Written by Dr Amit Chatterjee, SM
Wednesday, 30 May 2007
Two-stroke single cylinder engine * Displacement 248 cc (bore and stroke 63 x 80 mm) * Engine power 6.6 kW at 3850 rpm * Amal carburetor (starting at the production number 70001), or Graetzin (starting at the production number 86001) * Three-speed transmission was operated by hand, and a customized version by foot * JAWA construction closed duplex triangular frame made with steel stamping sections * Weight 95 kg * Maximum speed 100 km/hour * Average fuel consumption of 3 litre/100km In 1935, while JAWA was already marketing the one-seventy-five, two three-fifties and the small car, one more novelty was introduced - a two-stroke JAWA 250 cc. With that model started the great era of various two-fifties which later, after the war, made JAWA famous all over the world. The very first appeared on the market in the spring of 1935, followed up the one-seventy-five to become with it the mainstay of the factory’s production. JAWA 250 Special - early model with flat exhaust silencers (displayed at the JAWA Motorcycle Museum, Netvorice) It, too, was a two stroke, single cylinder displacement 248 cc (63x80), engine power 6.6 KW (9HP) at 3850 r.p.m. The seven port inverted scavenging Schnürle system replaced soon the original Villiers version improving scavenging and allowing flat top piston use. The engine was equipped with Vielliers (later Grätzin) carburetter and two exhaust pipes ending with flat silencers. The three-speed gearbox control was by hand lever, optionally by pedal. The pressed frame was based on the well proven concept tried out on the one-seventy-five and three-fifties. The capacity of the saddle type tank was 10 litres (petroil at the rate of 25 to 1). The motor cycle weighing 95 kg, attained 100 km/hour maximum speed, its average consumption was about 3 litres per 100 km. At 5,490 crowns the two-fifty stirred up the market and it is no wonder that it won within a short time thousands of customers. Until 1946 (with the war time interval) fourteen thousand units have been manufactured. JAWA 250 Special - early model with change lever mounted on the gearbox (displayed at the Motorcycle Museum, Lesna) Initially, the two-fifty was to be made with Villiers flat piston top and cross flow scavenging engines. But the concept failed to prove itself, the engines suffered from overheating and high consumption. The reason was imperfect scavenging. Consequently the idea of another Villiers Licence was abandoned and the more reliable Schnürle system introduced. Evidently many improvements have been made in the course of time. In 1936 still the two-fifty received a new Amal carburetter, the 1937 model had a longer tank and new hand gear change with gate on the tank instead of the original lever mounted on the gearbox. The flat exhaust silencers were replaced with oval shape silencers with the typical fishtail ends. Offered for sale was a small number of the so-called Mountain Models, characteristic with a second flywheel outside (not inside) the crankcase under the primary chain cover on the left side of the engine. Recommend this article...
Last Updated ( Saturday, 28 July 2007 )

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