Across 6 covered model years from 2018 to 2025, the Yamaha NMAX 155 motorcycle has a listed wet/running weight of 280 lb (127 kg).
Yamaha NMAX 155 weight overview
The weight is relatively manageable, so the bike should demand less effort than a heavyweight machine when backing up, parking or making slow-speed corrections.
Light Motorcycle
How heavy is the Yamaha NMAX 155?
wet weight
Using a model-level wet weight comparison, the Yamaha NMAX 155 is heavier than about 53.9% of 129 Yamaha scooters with compatible weight data.
Ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Yamaha NMAX 155 weight & related specs
| Model years covered | 2018, 2019, 2021, 2022, 2023, 2025 |
|---|---|
| Wet / running weight | 280 lb (127 kg) |
| Engine displacement | 155 cc |
| Power | 14.9 hp |
| Torque | 10.6 lb-ft (14.4 Nm) |
| Fuel capacity | 1.74 US gal (6.6 L) to 1.88 US gal (7.1 L) |
| Full-tank fuel weight (estimated) | 10.8 lb (4.9 kg) to 11.7 lb (5.3 kg) |
Weight changes by model year
The 2018 model is used as the baseline where data is available. Only later supplied values that differ are shown below. A year pill does not mean every individual weight field was supplied for that year.
Useful weight calculations
| Horsepower per 100 lb | 5.32 hp / 100 lb |
|---|---|
| Pounds per horsepower | 18.79 lb / hp |
| Torque per 100 lb | 3.79 lb-ft / 100 lb |
| Displacement per pound | 0.55 cc / lb |
| Weight per 100 cc | 180.6 lb / 100 cc |
| Fuel weight as % of bike weight | 3.9% to 4.2% |
What the weight numbers tell you
Yamaha NMAX 155 weight FAQ
What is the Yamaha NMAX 155 wet weight?
The supplied wet/running weight is 280 lb (127 kg) across the model years covered here. That figure is the most useful available number for real-world handling because operating fluids and fuel are included.
Is the Yamaha NMAX 155 lighter or heavier than other Yamaha scooters?
Weight is broadly typical for the category, landing around the 54th percentile in this model-level Yamaha comparison.
Which Yamaha NMAX 155 years have different weight specs?
No clear weight change appears in the usable model-year data. Other specifications may still differ by year.
How much does a full tank add to the Yamaha NMAX 155?
Based on the supplied 1.74 US gal (6.6 L) to 1.88 US gal (7.1 L) tank capacity, the gasoline itself weighs about 10.8 lb (4.9 kg) to 11.7 lb (5.3 kg) when full. On models with a wet/running weight, that fuel mass is already included in the listed ready-to-ride figure.
What is the combined Yamaha NMAX 155 and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 460 lb (208.6 kg) before riding gear, luggage or a passenger.
What is the Yamaha NMAX 155 power-to-weight ratio?
Available model-year data produces 5.32 hp per 100 lb. It shows engine output relative to motorcycle mass rather than just quoting peak horsepower. That places it around the 72nd percentile within the compatible Yamaha scooter power-to-weight comparison.
How much of the Yamaha NMAX 155 total weight comes from fuel?
The calculated full-tank fuel mass is about 3.9% to 4.2% of the listed motorcycle weight. Because the available basis is wet/running weight, that fuel is already included in the ready-to-ride figure.
How does Yamaha NMAX 155 torque compare with its weight?
Where compatible torque and weight figures are available, the model works out to 3.79 lb-ft per 100 lb. This gives more context than torque alone because it relates engine twist to the mass it has to move.
What is the Yamaha NMAX 155 engine-size-to-weight ratio?
The available figures work out to 0.55 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Yamaha Motorsports website.