What is the top speed of the NMAX155?

[Jenkins]

NMAX155 takes about 6.2 seconds (experimental data) to accelerate from standstill to 60km/h, and about 11.1 seconds to reach 80km/h. In terms of power: This motorcycle is equipped with a single-cylinder, water-cooled, SOHC-4 valve engine, with a maximum power of 11.3kW (8000r/min) and a maximum torque of 13.7N.m (6500r/min). It can reduce friction and power loss, improve combustion efficiency, and enhance cooling performance, thereby delivering stronger acceleration, achieving a higher top speed, and effectively reducing fuel consumption. In terms of frame structure: The NMAX155 features a lightweight steel tube frame with a low beam structure, making low-speed handling easier while providing sufficient rigidity for high-speed riding. The suspension system consists of a front telescopic fork with 100mm travel and a rear twin-tube shock absorber (the overseas high-end version is equipped with twin-tube shock absorbers with gas reservoirs).

[VanLilliana]

As an owner of the NMAX155, I tested it on a closed road and the dashboard showed a top speed of around 130km/h. However, the actual GPS speed is typically 5-10km/h lower. The factory ECU has a speed limiter, but after unlocking it, the dashboard can display speeds slightly over 140km/h. That said, the bike feels light and tends to wobble in crosswinds. I advise against blindly chasing top speed—with a 155cc displacement and a relatively high center of gravity, braking distances become noticeably longer above 100km/h. Upgrading the transmission and tires for better stability is more practical than pushing for higher speeds.

[SarahDella]

I rode a friend's modified NMAX155, which had its ECU flashed and pulley weights replaced, and the speedometer showed 138km/h with the engine revving at the redline. In stock condition, it easily accelerates to 120km/h on a flat road, but acceleration noticeably slows down after 125km/h. It's worth noting that the stock tires have average grip, making it prone to slipping when cornering at speeds over 110km/h. The bike's strength lies in the comfort of cruising at 80-100km/h, with top speed being just an additional parameter.

[CameronAnn]

Yamaha's official top speed is 130km/h, but actual tests show significant variations due to load and road conditions. A single rider on flat roads can reach around 125km/h at full throttle, while two riders reduce the speed to about 110km/h. The engine delivers its maximum power of 14.8 horsepower at 9000 RPM, and noticeable wind resistance occurs when the speedometer shows 130km/h. It's recommended to regularly inspect the transmission case, as belt slippage can cause a top speed reduction of 5-10km/h.

[MadisonAnn]

Compared to its peer the PCX160, the NMAX155 has a slightly higher top speed but slower acceleration. Actual GPS measurements show a top speed of around 118km/h in stock condition, with a speedometer error of approximately 8%. Downhill, the speedometer has been seen to display 135km/h, but for daily riding, 100-110km/h is the safest range. Installing a windshield significantly improves high-speed stability, though the top speed may decrease by 2-3km/h due to increased wind resistance.

[TessaRose]

From a mechanical perspective, the 155cc water-cooled single-cylinder engine paired with VVA (Variable Valve Actuation) determines its top speed based on the power-to-weight ratio. With a curb weight of 132kg and 10.7kW power output, a theoretical top speed of 130km/h is reasonable. Actual riding conditions are limited by transmission efficiency and aerodynamics - noticeable engine vibration increases when the speedometer shows 125km/h. During maintenance, pay special attention to drivetrain wear as worn belts can cause over 10% reduction in top speed.