Yamaha Nmax 155 - 2025 Specifications and Reviews

The 2025 Yamaha NMAX 155 is a modern scooter engineered for urban commuters and practical everyday riders seeking reliability and efficiency. Powered by a 155cc single-cylinder four-stroke engine delivering 12.1 horsepower, it combines fuel injection technology with liquid cooling for consistent performance in city traffic. Known for its user-friendly handling, comfortable seating, and dependable engineering, the NMAX 155 excels as an affordable, low-maintenance transportation solution.

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General information

Color OptionsMilky White, Dark Petrol
CategoryScooter
ModelYamaha NMAX 155

Engine and Transmission Specifications

StartingElectric
Emission DetailsEuro 5
ClutchDry centrifugal
Final DriveBelt (final drive)
GearboxAutomatic
Cooling SystemLiquid
IgnitionTCI
Fuel ControlSingle Overhead Cams (SOHC)
InductionInjection
Valves Per Cylinder4
Bore x Stroke58.0 x 58.7 mm (2.3 x 2.3 inches)
Compression Ratio11.6:1
Max Torque14.4 Nm (1.5 kgf-m or 10.6 ft.lbs) @ 6000 RPM
Max Power12.1 HP (8.8 kW)) @ 7500 RPM
Capacity:155.0 ccm (9.46 cubic inches)

Physical measures and capacities

Fuel Capacity7.10 litres (1.88 US gallons)
Wheelbase1350 mm (53.1 inches)
Ground Clearance135 mm (5.3 inches)
Overall Width740 mm (29.1 inches)
Overall Length1955 mm (77.0 inches)
Overall Height1115 mm (43.9 inches)
Seat Height765 mm (30.1 inches) If adjustable, lowest setting.
Wet Weight127.0 kg (280.0 pounds)
 
 

Yamaha Nmax 155 dimensions and frame

Rear BrakesSingle disc. ABS.
Brake Disc Diameter230 mm (9.1 inches)
Front BrakesSingle disc. Hydraulic. ABS.
Rear Tyre130/70-13
Front Tyre110/70-13
Rear Wheel Travel85 mm (3.3 inches)
Rear SuspensionUnit Swing, twin shocks
Front Wheel Travel100 mm (3.9 inches)
Front SuspensionTelescopic fork
Trail92 mm (3.6 inches)
FrameUnderbone

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Update specsReport missing specs or required updates.
Carrying CapacityUnderseat storage
LightingLED headlight
InstrumentsLCD instruments
Oil capacity1.00 litres (1.06 US quarts)
Rake (fork angle)26.0°
DrivelineV-Belt Automatic
Lubrication systemWet sump
Engine typeSingle cylinder, four-stroke
Model year2025

Performance Profile & Rider Fit

12.1 hp
Peak Power

Best For

Track5%
City92%
Cornering45%
Daily Riding90%
Touring25%
Passenger55%

Rider Profile

Best ForIdeal for beginners and commuters; the twist-and-go automatic and low 765mm seat make it approachable and unintimidating for new riders.
PurposeBuilt for urban commuting and errands. Nimble small-wheel scooter with underseat storage, great fuel economy and easy stop-and-go city manners.
Rider FitLight 127kg with a low 765mm seat and step-through underbone frame. Relaxed upright ergonomics, floorboard feet-forward stance and easy low-speed balance.
CharacterA practical, efficient and friendly commuter scooter. Liquid-cooled 155cc single with CVT delivers smooth, fuss-free power for daily city hops.
Not Ideal ForNot for highway cruisers, long-distance tourers, sport riders or anyone chasing speed and outright power; also unsuited to off-road use.

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

Rider Fit Visualizer

2025 Yamaha Nmax 155 Rider Ergonomics Assessment

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

Feet:

At 765mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2025 Yamaha Nmax 155, 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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