Speed characteristics of the S06 engine
In 1957, Kieleckie Zakłady Wyrobów Metalowych returns to its traditional production profile. The plant starts the production of the SHL M06-U motorcycle, developed by the design office of the Warsaw Motorcycle Factory. Engines with a swept volume of 0.148 drn3 were supplied with WFM. A novelty was the use of full-hub brakes with a drum diameter of 160 mm and a rubber intermediate element between the sprocket and the rear wheel hub. Compared to the popular WFM and WSK motorcycles, the motorcycle from Kielce was a vehicle of a higher standard. The aesthetic appearance of the vehicle was also influenced by deep mudguards, large brake drums, a high bench seat and a chromed exhaust system. This motorcycle was produced until 1959 and a total of 10,350 were made.
Engine - Type S06, spark-ignition, two-stroke, with backwash, rigidly mounted in the motorcycle frame. Bore 57 mm, stroke 58 mm. Number of cylinders l. Displacement 0.148 litre, compression ratio 6.5. Maximum power 4.8 kW (6.5 hp) at 4800 rpm. Maximum torque 11 Nm (1.1 kGm) at 3500 rpm. The engine block, cast in light alloy, divided in the vertical plane, was also the housing of the clutch, gearbox and magneto. Ribbed cast iron cylinder. Ribbed light alloy head. Crankshaft forged, folded, supported on four ball bearings. Forged connecting rod, double-row roller bearing in the foot. Light alloy cast piston with slightly convex crown and three sealing rings. Piston pin embedded floating. Piston timing. Control of the charge flow through the edges of the piston. Two through channels. Mixed lubrication, fuel/oil ratio 25:l. Forced air cooling. Power: horizontal carburetor, type G20, with a throat diameter of 20 mm, mounted directly on the cylinder. Fuel filter located in the tap next to the fuel tank. Mesh air filter, flat, attached to the carburetor. Dry weight of engine with accessories and gearbox 23.5 kg.
Electrical system - Nominal voltage 6 V. Positive earth. Ignition from the spark gap. Flywheel magneto, mounted on the right crankshaft journal. The magneto-generator stator consisted of: an ignition coil, two lighting coils, one battery charging coil and a circuit breaker. Static ignition setting 4.9-0.2 mm before TDC. Spark plug, M14X1.25 thread, 225 calorific value (Bosch). Alternating current generator, power 28 W, cooperating with a selenium rectifier type SPSs-36-08, placed in the lamp housing. 6 V lead battery, 7 Ah capacity. Headlamp with optic diameter 130 mm, with symmetrical low beam, high beam and parking light. Rear lamp with parking light. A horn, type SCS 6 V, attached to the front part of the motorcycle frame.
Drive system - Friction clutch, wet, three-plate, with cork inserts, located on the left side of the engine. Six compression springs. Lever engagement mechanism, located under the current cover of the engine, acting on the clutch through a pusher guided in the hole of the main shaft of the gearbox. The drive is transferred from the crankshaft to the clutch with a single sleeve chain Tl-9.525X5X7.5 with 44 links. Gear ratio 2.31 (30/13). Gear box with three ratios. Constantly meshing gears. Ratios for individual gears: Ib-2.935, IIb-1.486, IIIb-1.00. Shifting gears with a foot lever located on the left side of the engine. Drive output from the gearbox to the rear wheel on the right side of the engine. Transmission of the drive to the rear wheel with a single-row roller chain Rl-12-7X X8.51X7, 79 by 122 links. Gear ratio 3.36 (47/14). Chain tension adjustment with two reversible tensioners located at the ends of the rear swing arm arms. Between the sprocket and the rear hub, there is a drive damper in the form of a rubber disc with holes.
Chassis - Cradle frame, closed, double, welded from steel pipes with a rectangular cross-section. Two ball bearings embedded in the head tube. Passenger footrest brackets welded to the rear of the frame. Front wheel suspension on telescopic fork, with coil springs, without oil damping. Two sliding sleeves, 31 mm in diameter, pressed into each leg. Rubber covers. Fork shelves, upper and lower, made of pressed pressed metal. Front wheel travel 145 mm. Rear wheel suspension on trailing arm, with two spring elements, with coil springs and telescopic shock absorbers. Rocker arm made of steel tubes, with a rectangular cross-section of 20X27 mm, mounted on turbax bushings. Rear wheel travel 95mm. Spoked road wheels, rims sized 1.85X19", made of steel. Axles of the wheels.
Braking and Steering - Brakes mechanically actuated, independent. Front and rear drum brakes, full hub. Light alloy cast brake drums with cast iron insert. Internal diameter of brake drums 160 mm. The surface of the friction linings is 232 cm2. The width of the friction linings is 40 mm. The hand brake is controlled by a Bowden cable, the foot brake is operated by a rigid link located on the left side of the motorcycle. Speedometer drive with a flexible shaft from the rear wheel. Handlebar made of steel tube, attached through brackets to the top shelf of the fork. Clutch and brake lever grips made of sheet steel, light alloy cast levers. Winding type "gas" twist handle.
Body - Deep mudguards of pressed metal. The front guard is attached to the movable part of the fork. Fuel tank of welded steel, fixed to the frame with one bolt, equipped with two rubber pads. Two-position, sliding fuel tap. Two-seater sofa saddle, microporous rubber cushion, dermatoid cover, two-tone. Battery holder in the rear part of the frame, tool boxes on both sides. Adjustable riders's footrests with rubber covers. Passenger footrests with rubber covers, fold up. The central stand is made of steel pipes with a rectangular cross-section, suspended on the lower beam of the frame. The chain guard consisted of fixed parts, attached to the engine, and a movable part, attached to the swingarm, covering the chain only from the top. Lower exhaust system, located on the right side of the motorcycle. Removable exhaust muffler.
Dimensions - Wheelbase 1290 mm, overall length 2020 mm, width 660 mm, height 970 mm. Front seat height 780 mm. Ground clearance 180 mm (dimensions under static load of 1 person).
Weights - Motorcycle 108 kg, permissible load 160 kg. Permissible total weight 280 kg.
Capacities - Fuel tank 13 litre (without reserve), gearbox 0.7 litre. Operating data - Top speed 78 km/h. Fuel consumption 3.3 litre /100 km. Minimum turning circle is 4.0 m. Tyre pressure: front wheel 0.12 MPa (1.2 kG/cm2), rear wheel 0.14 MPa - 0.19 MPa (1.4-1.9 kG/cm2) ).
In 1959, Kieleckie Zakłady Wyrobów Metalowych began production of a modernized motorcycle with a cylinder capacity of 148cc. In place of the existing front telescopic fork without oil damping, a "medium" push arm was used, cooperating with spring elements, with coil springs and double-acting hydraulic shock absorbers. The new type of front wheel suspension significantly improved driving comfort. Other changes in the SHL M06-T motorcycle compared to the previous model are: a new engine intake system, a new front lamp with a reflector with a diameter of 150 mm of the optical system and the installation of a brake light. This machine was produced until 1961, and a total of 23,370 of these motorcycles were made.
Engine - Type S06, with spark ignition. Data as in SHL M06-U. Electrical system - Data as in the SHL M06-U, with the following changes: Headlamp with an optical system diameter of 150 mm, with a high beam, a symmetrical dipped beam and a position light. Rear lamp with position light and stop light. Drive system - Data as in the SHL M06-U motorcycle.
Suspension system - Data as on the SHL M06-U, with the following changes: Front wheel suspension on a "medium" push arm, with two spring elements, with coil springs and telescopic shock absorbers. Front wheel travel 160 mm. Rear wheel suspension on trailing arm, with two spring elements, with coil springs and telescopic shock absorbers. Rear wheel travel 105mm.
Braking and Steering - Brakes mechanically actuated, independent. Solid hub brake drums, cast light alloy, 160 mm diameter. The surface of the friction pads is 232 cm2, the width of the friction pads is 40 mm. The hand brake is controlled by a Bowden cable, the foot brake is operated by a rigid link located on the left side of the motorcycle. Handlebar made of steel tube, attached through brackets to the upper shelf of the fork. Clutch and handbrake levers forged from light alloy.
Body - Data as SHL M06-U with the following changes: Front mudguard attached to the swingarm. A dual seat, with a strap handle for the passenger. Two flat tool boxes, between them a compartment for the battery and an enclosed air filter. Adjustable riders's footrests with rubber covers.
Dimensions - Data as for the SHL M06-U, with the following changes: overall length 2010 mm, height 960 mm.
Weights - Motorcycle 108 kg. Permissible load 160 kg. Permissible total weight 290 kg. ''
Capacity - Data as in the SHL M06-U.
Performance data - Data as for the SHL M06-U, with the following change: minimum turning circle 3.60 m.
Source: Polish History Archive