What category is the 2021 WK SX 125?

The 2021 WK SX 125 has a Category of Scooter.

What is the engine size of the 2021 WK SX 125?

The 2021 WK SX 125 has a Capacity: of 124.0 ccm (7.57 cubic inches).

What type of engine does the 2021 WK SX 125 have?

The 2021 WK SX 125 has a Engine type of Single cylinder, four-stroke.

What is the engine power of the 2021 WK SX 125?

The 2021 WK SX 125 has a Power of 8.7 HP (6.4 kW) @ 7500 RPM.

What is the torque of the 2021 WK SX 125?

The 2021 WK SX 125 has a Torque of 9.0 Nm (0.9 kgf-m or 6.6 ft.lbs) @ 5900 RPM.

Is the 2021 WK SX 125 air cooled or liquid cooled?

The 2021 WK SX 125 has a Cooling system of Air.

How many gears does the 2021 WK SX 125 have?

The 2021 WK SX 125 has a Gearbox of Automatic.

How much does the 2021 WK SX 125 weigh?

The 2021 WK SX 125 has a Dry weight of 100.0 kg (220.5 pounds).

What is the seat height of the 2021 WK SX 125?

The 2021 WK SX 125 has a Seat height of 800 mm (31.5 inches) If adjustable, lowest setting..

WK SX 125 - 2021 Specifications and Reviews

Name: 2021 WK SX 125
Brand: WK

The 2021 WK SX 125 is a practical 124cc scooter designed for urban commuters and beginner riders seeking affordable, fuel-efficient transportation. Powered by a single-cylinder four-stroke engine producing 8.7 horsepower, it features automatic CVT transmission and fuel injection for reliable, low-maintenance performance. Best suited for city riding and short-distance daily commutes, this Euro 5-compliant scooter excels in maneuverability and economical operation.

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2021

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General information
Category	Scooter
Year	2021
Model	WK SX 125
Engine and Transmission Specifications
Emission details	Euro 5
Clutch	CVT
Transmission type	Belt (final drive)
Gearbox	Automatic
Cooling system	Air
Fuel system	Injection
Bore x Stroke	52.4 x 57.8 mm (2.1 x 2.3 inches)
Torque	9.0 Nm (0.9 kgf-m or 6.6 ft.lbs) @ 5900 RPM
Power	8.7 HP (6.4 kW) @ 7500 RPM
Engine type	Single cylinder, four-stroke
Capacity:	124.0 ccm (7.57 cubic inches)

Brakes, suspension, Frame and wheels
Seat	Dual seat
Rear brakes	Single disc
Diameter	220 mm (8.7 inches)
Front brakes	Single disc
Rear tire	120/70-14
Front tire	120/70-14
Rear Suspension	Dual shock
Front Suspension	Hydraulic fork
Frame type	Underbone
Physical measures and capacities
Fuel capacity	4.10 litres (1.08 US gallons)
Overall width	665 mm (26.2 inches)
Overall length	1940 mm (76.4 inches)
Overall height	1130 mm (44.5 inches)
Seat height	800 mm (31.5 inches) If adjustable, lowest setting.
Power/weight ratio	0.0872 HP/kg
Dry weight	100.0 kg (220.5 pounds)

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Carrying capacity	Underseat storage
Light	Twin
Instruments	Digital
Starter	Electric & kick
Color options	Blue, orange

Performance Profile & Rider Fit

8.7 hp

Peak Power

Best For

Track5%

City82%

Cornering40%

Daily Riding75%

Touring15%

Passenger35%

Rider Profile

Best For	Suitable for beginners and learner riders, including those on a light-license or moped-equivalent permit in many regions.
Purpose	Built as a practical, low-cost commuter scooter for short urban trips, errands, and light city riding rather than performance or adventure use.
Rider Fit	The low 800mm seat height and light dry weight around 100kg make it very accessible for shorter or less experienced riders to handle and paddle at a stop.
Character	A no-frills, easygoing 125cc automatic scooter that prioritizes simplicity, fuel efficiency, and ease of use over excitement or speed.
Not Ideal For	Not suited for highway touring, high-speed travel, off-road use, or riders wanting a powerful or thrilling ride.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2021 WK SX 125 Rider Ergonomics Assessment

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Feet:

At 800mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2021 WK SX 125, with a moderate knee angle of around 100 degrees and a slightly forward riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

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MotorcycleDB Review

The 2021 WK SX 125 is a powerful and reliable motorcycle that is perfect for riders looking for a thrilling off-road experience. With its 125cc engine, the SX 125 delivers impressive performance and speed, making it a great option for riders of all skill levels. The sleek and stylish design of the motorcycle also adds to its overall appeal, making it a standout choice in the competitive off-road motorcycle market. Additionally, the SX 125 boasts excellent handling and maneuverability, thanks to its advanced suspension and responsive brakes. This makes it easy to navigate through rugged terrain and challenging obstacles, giving riders the confidence to tackle any off-road adventure. Overall, the 2021 WK SX 125 is a top-notch motorcycle that offers an exhilarating and enjoyable riding experience for off-road enthusiasts. Whether you're a seasoned rider or just starting out, the 2021 WK SX 125 is a fantastic choice for anyone looking for a fun and reliable off-road motorcycle. Its powerful engine, sleek design, and exceptional handling make it a standout option in its class. With its impressive performance and durability, the SX 125 is sure to provide riders with countless thrilling adventures on the trails.