Yamaha Aerox 4 - 2019 Specifications and Reviews

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General information

Year2019

Engine and Transmission Specifications

DrivelineV-Belt Automatic
Transmission type,final driveBelt
GearboxAutomatic
Cooling systemLiquid
Lubrication systemWet sump
IgnitionTCI
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection
Bore x Stroke38.0 x 43.5 mm (1.5 x 1.7 inches)
Compression12.0:1
Torque3.30 Nm (0.3 kgf-m or 2.4 ft.lbs) @ 4500 RPM
Power2.95 HP (2.2 kW) @ 7240 RPM
Engine typeSingle cylinder, four-stroke
Capacity:49.00 ccm (2.99 cubic inches)

CategoryScooter
ModelYamaha Aerox 4
 
 

Brakes, suspension, Frame and wheels

Wheels5-spoke cast aluminium
Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc
Front brakes diameter190 mm (7.5 inches)
Front brakesSingle disc
Rear tyre130/60-13
Front tyre120/70-13
Rear wheel travel60 mm (2.4 inches)
Rear SuspensionHydraulic unit swing
Front wheel travel80 mm (3.1 inches)
Front SuspensionTelescopic fork
Frame typeSteel, tubular

Physical measures and capacities

Fuel capacity6.00 litres (1.59 gallons)
Wheelbase1,275 mm (50.2 inches)
Ground clearance118 mm (4.6 inches)
Overall width706 mm (27.8 inches)
Overall length1,876 mm (73.9 inches)
Overall height1,154 mm (45.4 inches)
Seat height817 mm (32.2 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc97.0 kg (213.8 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Carrying capacityUnder-seat helmet storage for a full-face helmet.
InstrumentsLCD instruments
StarterElectric & kick
Color optionsMatte grey, blue

Performance Profile & Rider Fit

3 hp
Peak Power

Best For

Track5%
City88%
Cornering40%
Daily Riding80%
Touring15%
Passenger30%

Rider Profile

Best ForThis is an ideal machine for beginners or licence-restricted riders, requiring minimal experience to operate confidently.
PurposeBuilt purely for short-hop urban commuting and running errands, not for speed or distance.
Rider FitVery low seat height and lightweight chassis make it accessible and easy to manage for riders of almost any size or strength.
CharacterA practical, nimble little scooter that prioritizes ease of use, fuel efficiency, and city maneuverability over performance.
Not Ideal ForThis 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

2019 Yamaha Aerox 4 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 817mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2019 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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