At the heart of the 1977 WSK 175 W21B2S2 enduro - offroad motorcycle, WSK pairs a 173.8 cc (10.6 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 14 HP (10.2 kW) at 6,300 rpm while maximum torque reaches 16.7 Nm (12.3 lb-ft) at 5,800 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 80.6 HP per liter and a 500 rpm working window between peak torque (5,800 rpm) and peak power (6,300 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the 175 W21B2S2 measures 111 kg (245 lbs) dry, translating to a power-to-weight ratio of 0.13 HP/kg (7.93 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,320 mm (52 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 US gal) fuel tank paired with a rated consumption of 3 L/100 km provides an estimated theoretical range of roughly 267 km (166 miles) between fill-ups, while factory top speed is listed at 100 km/h (62 mph).
Specific Output
80.6 HP/L
Power-to-Weight
0.13 HP/kg (7.93 kg/HP)
Power Band Window
5,800–6,300 rpm
Theoretical Range
~267 km (166 mi)
Engine
Displacement173.8 ccm (10.61 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power14.0 HP (10.2 kW)) @ 6300 RPM
Torque16.7 Nm (1.7 kgf-m or 12.3 ft.lbs) @ 5800 RPM
Compression9.0:1
Bore x Stroke61.0 x 59.5 mm (2.4 x 2.3 inches)
Fuel SystemCarburettor. Bing 1/26/125/II 26 mm
Fuel ControlPort control
IgnitionMagneto
LubricationMixture 1 : 30
CoolingAir
Max RPM6600
Transmission
Gearbox4-speed
Final DriveChain (final drive)
ClutchWet 4 plate
Performance
Top Speed100.0 km/h (62.1 mph)
Fuel Consumption3.00 litres/100 km (33.3 km/l or 78.41 mpg)
Greenhouse Gases69.6 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustSteel single pipe
Chassis
Frame TypeSingle, steel welded tubes
Front SuspensionCoil springs with oil shock absorbers in fork
Front Travel150 mm (5.9 inches)
Rear SuspensionTrailing arms with two coil springs and oil shock absorbers
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
