What category is the 2021 Yamaha Aerox 4?

The 2021 Yamaha Aerox 4 has a Category of Scooter.

What is the engine size of the 2021 Yamaha Aerox 4?

The 2021 Yamaha Aerox 4 has a Capacity: of 49.5 ccm (3.02 cubic inches).

What type of engine does the 2021 Yamaha Aerox 4 have?

The 2021 Yamaha Aerox 4 has a Engine type of Single cylinder, four-stroke.

What is the engine power of the 2021 Yamaha Aerox 4?

The 2021 Yamaha Aerox 4 has a Power of 3.0 HP (2.2 kW) @ 7250 RPM.

What is the torque of the 2021 Yamaha Aerox 4?

The 2021 Yamaha Aerox 4 has a Torque of 3.3 Nm (0.3 kgf-m or 2.4 ft.lbs) @ 4500 RPM.

Is the 2021 Yamaha Aerox 4 air cooled or liquid cooled?

The 2021 Yamaha Aerox 4 has a Cooling system of Liquid.

How many gears does the 2021 Yamaha Aerox 4 have?

The 2021 Yamaha Aerox 4 has a Gearbox of Automatic.

How much does the 2021 Yamaha Aerox 4 weigh?

The 2021 Yamaha Aerox 4 has a Weight incl. oil, gas, etc of 97.0 kg (213.8 pounds).

What is the seat height of the 2021 Yamaha Aerox 4?

The 2021 Yamaha Aerox 4 has a Seat height of 817 mm (32.2 inches) If adjustable, lowest setting..

Yamaha Aerox 4 - 2021 Specifications and Reviews

Name: 2021 Yamaha Aerox 4
Brand: Yamaha

The 2021 Yamaha Aerox 4 is a lightweight 50cc automatic scooter designed for new riders and urban commuters seeking affordable, fuel-efficient transportation. Powered by a liquid-cooled four-stroke engine with fuel injection, it delivers modest performance ideal for city riding. Known for its simplicity, reliability, and low operating costs, the Aerox 4 excels as an entry-level scooter for casual riders.

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2021

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Engine and Transmission Specifications
Driveline	V-Belt Automatic
Transmission type	Belt (final drive)
Gearbox	Automatic
Cooling system	Liquid
Lubrication system	Wet sump
Ignition	TCI
Fuel control	Single Overhead Cams (SOHC)
Fuel system	Injection
Bore x Stroke	38.0 x 43.5 mm (1.5 x 1.7 inches)
Compression	12.0:1
Torque	3.3 Nm (0.3 kgf-m or 2.4 ft.lbs) @ 4500 RPM
Power	3.0 HP (2.2 kW) @ 7250 RPM
Engine type	Single cylinder, four-stroke
Capacity:	49.5 ccm (3.02 cubic inches)


Category	Scooter
Year	2021
Model	Yamaha Aerox 4
Brakes, suspension, Frame and wheels
Wheels	5-spoke cast aluminium
Rear brakes	Single disc
Diameter	190 mm (7.5 inches)
Front brakes	Single disc
Rear tire	130/60-13
Front tire	120/70-13
Rear wheel travel	64 mm (2.5 inches)
Rear Suspension	Hydraulic unit swing
Front wheel travel	80 mm (3.1 inches)
Front Suspension	Telescopic fork
Frame type	Steel, tubular
Physical measures and capacities
Fuel capacity	6.00 litres (1.59 US gallons)
Wheelbase	1275 mm (50.2 inches)
Ground clearance	118 mm (4.6 inches)
Overall width	705 mm (27.8 inches)
Overall length	1870 mm (73.6 inches)
Overall height	1155 mm (45.5 inches)
Seat height	817 mm (32.2 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc	97.0 kg (213.8 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Carrying capacity	Under-seat helmet storage for a full-face helmet.
Instruments	LCD instruments
Starter	Electric & kick
Color options	Matte Grey, Yamaha Blue

Performance Profile & Rider Fit

3 hp

Peak Power

Best For

Track5%

City88%

Cornering40%

Daily Riding80%

Touring15%

Passenger30%

Rider Profile

Best For	This is an ideal machine for beginners or licence-restricted riders, requiring minimal experience to operate confidently.
Purpose	Built purely for short-hop urban commuting and running errands, not for speed or distance.
Rider Fit	Very low seat height and lightweight chassis make it accessible and easy to manage for riders of almost any size or strength.
Character	A practical, nimble little scooter that prioritizes ease of use, fuel efficiency, and city maneuverability over performance.
Not Ideal For	This is not the choice for anyone wanting highway speeds, long-distance touring, or carrying a passenger any real distance.

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

Rider Fit Visualizer

2021 Yamaha Aerox 4 Rider Ergonomics Assessment

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Feet:

At 817mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2021 Yamaha Aerox 4, with a moderate knee angle of around 100 degrees and a slightly forward riding position.

Data quality: measured. 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 Yamaha Aerox 4 is a stylish and powerful motorcycle that offers a smooth and exhilarating ride. With its 155cc liquid-cooled engine, this bike provides impressive performance and agility, making it perfect for urban commuting as well as long-distance journeys. The Aerox 4 also features a sleek and modern design, with LED headlights and a digital instrument panel, adding to its appeal for riders looking for a combination of style and functionality. Overall, the 2021 Yamaha Aerox 4 is a top-notch choice for riders seeking a versatile and reliable motorcycle. Its powerful engine, stylish design, and advanced features make it a standout option in its class. Whether you're cruising through city streets or hitting the open road, the Aerox 4 delivers an exceptional riding experience that is sure to impress. If you're in the market for a high-performance scooter with a modern aesthetic, the Yamaha Aerox 4 is definitely worth considering.