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WSK M06 1957
Wytwórnia Sprzętu Komunikacji in Świdnik, an aeronautical plant, starts the production of motorcycles in order to fully use its production capacity and bring more of these highly sought-after vehicles to the market. In 1954, an informative series of motorcycles with engines with a volume of 125cc was assembled from parts delivered from the Warsaw Motorcycle Factory. From February 1955, the production of motorcycles based on the WFM M06 documentation began. That year, 3,100 pieces were made. In the following years, production increased rapidly. In 1956, 15,000 motorcycles were made in Świdnik, and 25,000 in 1957. Simultaneously with the use of a new electrical system in WFM motorcycles in 1957, vehicles from Świdnik also received it. At that time, a 6 V battery with a capacity of 7 Ah was introduced, a selenium rectifier enabling it to be charged by a generator, an electromagnetic signal and parking lights. A speedometer with odometer is built into the top fork. The technical description below applies to the WSK M06 model from 1957.
Engine - Type SOI, spark ignition. Data as in the WFM M06 motorcycle.
Electrical System - Data as on WFM M06 with the following changes: Static ignition timing 27° B.C.M. (4.5 mm B.C.C.). Alternating current magneto generator with a power of 28 W, mounted on the right crankshaft pin. Selenium rectifier located in the front lamp. 6 V lead battery, 7 Ah capacity. A sound signal, disc, mounted under the seat, on the right side of the motorcycle.
Drive system - Data as in the WFM M06 motorcycle.
Carrying system - Data as in the WFM M06 motorcycle.
Braking and steering system - Data as on the WFM M06 motorcycle.
Body - Data as on the WFM M06 motorcycle, with the following changes: Micro-rubber bench seat, covered with Winiderm, equipped with a strap for the passenger. Two flat tool boxes fixed to the frame. Battery compartment between the cans. Speedometer embedded in the upper shelf of the fork.
Dimensions - Data as in the WFM M06 motorcycle.
Weight - Motorcycle 90 kg. Permissible load 150 kg. Permissible total weight 240 kg.
Capacity - Fuel tank 13.5 litre (without reserve). Gear box 0.5 litre.
Operating data - Top speed 72 km/h. Fuel consumption 2.8-3.5 litres7100 km. The smallest turning diameter is 3.2 m. Tyre pressure: front wheel -0.08 MPa (0.8 kG/cm2), rear wheel (without passenger) 0.12 MPa (1.2 kG/cm2), and driving with a passenger 0.15 MPa (1.5 kG/cm2).
WSK 125 (prototype)
In 1957, in the experimental department of Wytwornia Sprzetu Komunikacyjnego in Świdnik, a prototype of a new class 125 motorcycle was made. The design of this vehicle was also adapted to engines with a larger displacement. The creators of the motorcycle were engineers: Krzeszowice, Okrąglak, Szymański and Wierciński. The SOI engine used in the motorcycle had slightly more power thanks to the new exhaust system. The new tubular frame was stiffer than the previous one, and at the same time 30% lighter. A new front fork with oil damping and full-hub brake drums made of light alloy are used. Deep mudguards, a new headlamp with a built-in speedometer, a high two-level seat and an overhead exhaust system radically changed the silhouette of the motorcycle. Production of the motorcycle in this form was not undertaken,
Engine - Data as for WSK M06/l 957 motorcycle.
Electrical system - Data as for WSK M06/1957 motorcycle.
Drive system - Data as in the motorcycle WSK M06/1957.
Carrying system - Data as in the motorcycle WSK M06/1957, with the following changes: Suspension of the front wheel on a telescopic fork, with oil damping. Front cat stroke 200 mm.
Braking and steering system - Data as in the motorcycle WSK M06/1957.
Body - Data as in the motorcycle WSK M06/1957, with the following changes: Deep mudguards pressed from pressed metal. Two-seater bench seat, two-level, with a handle for a passenger. The ignition switch and the speedometer are mounted in the headlight housing.
Full drive chain cover. Central base, welded from steel pipes. Exhaust system, upper, located on the right side of the motorcycle.
Dimensions - No further details.
Weights - Motorcycle approx. 90 kg. Permissible load 150 kg. Permissible total weight 2.50 kg.
Capacities - Data as for WSK M06/1957.
Operating data - ibid.
Top speed 75 km/h. Fuel consumption 3.0-3.7 litre /100 km.
WSK M06-Z
The Design Office of Wytwornia Sprzetu Komunikacyjnego in Świdnik has developed a modernized, more luxurious version of the M06 motorcycle. The new model was marked with the symbol M06-Z. The design changes were aimed at improving the traction properties of the vehicle and increasing driving comfort. The motorcycle uses an SOI-Z engine with an increased power of 4.4 kW (6 HP), the production of which was launched by Zakłady Metalowe in Nowa Dęba. The design of this engine was developed by Eng. Eng. W. Wiatrak and St. Jarnuszkiewicz. The front fork design has been redesigned with oil damping, battery covers and a taller split-level bench seat. New full-hub brakes, with an increased diameter, have increased driving safety. Serial production of the WSK M06-Z model began in 1959.
Engine - type S01-Z, with spark ignition. Data as on the WSK M06 motorcycle, with the following changes: Compression ratio 6.9. Maximum power 4.4 kW (6 hp) at 4800 rpm. Maximum torque 10.8 Nm (1.1 kGm) at 3500 rpm.
Power supply: horizontal carburettor, type G20, with a throat diameter of 20 mm. Dry weight of engine with accessories and gearbox 21 kg.
Electrical System - Data as for WSK M06 motorcycle with the following changes: Static ignition timing 30° before TDC (3.0 mm before TDC). Spark plug, M14X1.24 thread, 225 calorific value (Bosch). A sound signal, disc mounted on the front fork under the headlight.
Drive system - Data as in the WSK M06 motorcycle.
Leg system - Data as in the WSK M06 motorcycle, with the following changes: Passenger footrest brackets welded to the rear part of the frame. Front wheel suspension on telescopic fork, with oil damping. Front wheel travel 160 mm, rear wheel travel 83 mm.
Braking and Steering - Data as on WSK M06 motorcycle with the following changes: Front and rear drum brakes, full-hub cast light alloy brake drums with cast iron insert. Internal diameter of drums 132 mm. The width of the friction linings is 30 cm. Total cladding area 137 cm.
Body - Data as for the WSK M06 motorcycle, with the following changes: Deep mudguards made of pressed pressed metal. Folding passenger footrests with rubber pads. Central stand, welded from steel C-profiles. Lower exhaust system, mounted on the right side of the motorcycle. Chrome muffler. Behind the seat, there is a handle that facilitates placing the motorcycle on the center stand.
Dimensions - Wheelbase 1290 mm. Length 2060 mm, width 650 mm, height 1010 mm. Fifth wheel rise 780 mm, ground clearance within the wheelbase 210 mm.
Weights - Motorcycle 116 kg. Permissible load 150 kg. Permissible total weight 280 kg.
Capacities - Data as in the WSK M06 motorcycle.
Operating data - Top speed 78 km/h. Fuel consumption 2.5-3.0 litre/1OO km. The smallest turning circle to the right 3.40 m, to the left 3.36 m. Air pressure in tyres: front wheel 0.08 MPa (0.8 kG/cm2), rear wheel 0.12-0.15 MPa (1, 2-1.5 kg/cm2).
WSK Sarenka (prototype)
Constructors from the Communication Equipment Factory in Świdnik, under the direction of Eng. Koś, developed in 1960 a new model of a popular motorcycle. According to the assumptions, it was to be a vehicle with a higher driving comfort than the previous models, while maintaining the lowest possible production costs. It contains many innovative solutions. An interesting design was the lightweight back frame, welded from pressed metal stampings, and the rear wheel suspension with a single central spring element built inside the frame. The mudguards and the fuel tank were made as pressed metal stampings, divided in the plane of symmetry and with rolled edges, which were covered with rubber covers after welding. A prototype engine, developed in Zakłady Metalowe in Nowa Dęba, was used in Sarence. This engine developed a power of 5,
Engine - spark ignition, two-stroke, with backwash, mounted in two points in the motorcycle frame. Number of cylinders l. Engine displacement 125cc litre. Maximum power 5.1 kW (7 hp) at 5000 rpm. Light alloy cast crankcase, vertically split. Ribbed cast iron cylinder. Ribbed head made of light alloy casting. Engine lubrication with a mixture of fuel and oil in the ratio of 25 : l. Air cooling without force. Power supply: horizontal carburettor, type G20, with a throat diameter of 20 mm.
Electrical installation - Data as for the WSK M06-Z.
Drive system - Data as for the WSK M06-Z, with the following changes: Four-speed gearbox. Gears constantly meshed. Shifting gears with a foot lever located on the left side of the engine. Rear wheel drive output on the right side of the vehicle. Transmission of the drive to the rear wheel with a single-row chain.
Carrying system - Ridge frame, welded from sheet steel stampings. Two ball bearings embedded in the head tube. Front wheel suspension on telescopic fork, with oil damping. Progressive action coil springs. Trailing arm rear wheel suspension with single central spring element, coil spring and telescopic shock absorber. Other data as for the WSK M06-Z.
Braking and steering system - Data as for the WSK M06-Z.
Body - Deep mudguards, pressed from sheet steel. The front mudguard is attached to the movable part of the fork. Fuel tank welded from sheet steel stampings. Sofa saddle, double, with extra. two coil springs. Toolbox placed under the saddle. Sheet steel side covers to protect the carburetor, air filter and battery. Riders's footrests with rubber pads. Passenger footrests fold up, attached to the rear swingarm. Full chain guard, attached to the rear swingarm. Lower exhaust system, located on the left side of the motorcycle.
Dimensions - Wheelbase approx. 1300mm. Total length approx. 2050 mm, height approx. 1050 mm.
Weights - Motorcycle approx. 100 kg. Permissible load 150 kg. Permissible total weight 250 kg.
Capacities - Fuel tank capacity 13.5 litre, gearbox capacity 0.7 litre.
Operating data - Top speed 80 km/h. Fuel consumption approx. 3 litre / /100 km.
Source: Polish History Archive
