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MotoLibrary Score
33/100Commuter
Power
7 HP
Torque
9 Nm
Engine
124 ccm
Technical Overview
2017 WK Retro 125 Sport Technical Analysis & Specification Breakdown
Built around WK's scooter motorcycle platform, the 2017 WK Retro 125 Sport pairs a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 7.4 HP (5.4 kW) at 7,500 rpm while maximum torque reaches 9 Nm (6.6 lb-ft) at 5,900 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 59.7 HP per liter and a 1,600 rpm working window between peak torque (5,900 rpm) and peak power (7,500 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
Rider ergonomics and chassis geometry center around a 770 mm (30.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,335 mm (52.6 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
59.7 HP/L
Power Band Window
5,900–7,500 rpm
Standover Height
770 mm (30.3 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power7.4 HP (5.4 kW)) @ 7500 RPM
Torque9.0 Nm (0.9 kgf-m or 6.6 ft.lbs) @ 5900 RPM
Bore x Stroke52.4 x 57.8 mm (2.1 x 2.3 inches)
Fuel SystemCarburettor
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchCVT
Chassis
Front SuspensionHydraulic fork
Rear SuspensionDual adjustable oil shock
Wheelbase1335 mm (52.6 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
