Yamaha NMAX 155 (MY2020) — Scooter
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2020–2025 · Scooter · Buyer's Guide

NMAX 155 (MY2020)

City Traffic, Zero Stress

The Machine's Character

The NMAX 155 is Yamaha's answer to a plain question: what does a city rider actually need every day? At its heart is a 155 cc liquid-cooled single with Variable Valve Actuation to strengthen the midrange. It makes 15 hp and 10 lb-ft, enough to get clear of the cars when the light goes green. A CVT and belt final drive make it pure twist-and-go. What lifts this generation above the basic commuter scooter is its equipment. ABS, traction control, keyless ignition, smartphone connectivity and an LED headlight all come standard, on a scooter that weighs just 289 lb (131 kg) wet.

It ages well if you look after it. It returns 98 mpg, so the 1.9 gal (7.1 L) tank barely touches your budget, and the one maintenance job you can't skip is the CVT. Inspect the belt every 5,000–6,200 mi (8,000–10,000 km) and plan to replace it somewhere between 12,000 and 16,000 mi (20,000–25,000 km). It's built for commuters, errand runners and anyone whose riding is measured in city blocks rather than state lines. The honest caveat is speed. With a 78 mph (125 km/h) top end, long freeway stints are a strain, and neither the fork nor the shock offers any adjustment.

Hard Numbers

Spec sheets don't ride bikes, but they set the baseline.

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Key specifications
Power 15 hp (11 kW) @ 8,000 rpm
Torque 10 lb-ft (14 Nm) @ 6,500 rpm
Displacement 155 cc
Engine Single-cylinder
Cooling Liquid-cooled
Final drive Belt
Front tire 110/70-13
Rear tire 130/70-13
Seat height 30.1 in (765 mm)
Wet weight 289 lb (131 kg)
Fuel capacity 1.9 gal (7.1 L)
Top speed 78 mph (125 km/h)
Fuel economy 98 mpg (US)

Equipment check

Connectivity

  • Smartphone Connectivity Standard
  • Keyless System Standard

Lighting

  • LED Headlight Standard

Safety

  • ABS Standard
  • Traction Control Standard
Elevated aerial view of Seattle's downtown skyline looking toward the city core along a dense urban street canyon. A mix of glass-and-steel skyscrapers and mid-rise residential towers fills the frame. A construction crane is active on the left. The street below carries light vehicle traffic flanked by mature street trees.
Josh Hild / Pexels

Known issues

  • ABS sensor failure or malfunction

    brakes rare

    ABS warning light on dashboard; may cause loss of ABS function.

  • CVT belt and roller wear

    drivetrain occasional

    Jerky acceleration, slipping, or rattling from the CVT case. Belt should be inspected every 5,000–6,200 mi (8,000–10,000 km) and replaced around 12,000–16,000 mi (20,000–25,000 km).

  • Fuel injector clogging

    fuel system occasional

    Rough idle, hard starting, or poor fuel economy due to contaminated fuel causing injector deposits.

  • Battery drain and smart key malfunction

    electrics occasional

    Weak starting, smart key detection issues, and premature battery drain can occur, especially with frequent short trips and accessory loads.

  • Front fork seal leaks

    suspension occasional

    Oil residue on lower fork legs; may lead to reduced damping performance over time.

The Numbers Compared

Compare the technical specifications of the Yamaha NMAX 155 with other bikes in its class.

Head-to-head: Yamaha NMAX 155 vs. its rivals

What's new versus the previous generation

If you're cross-shopping the older generation, here's what changed.

Yamaha NMAX 155 (MY2015)

Previous generation · 2015–2019

Yamaha NMAX 155 (MY2015)

City Traffic's Easy Rider

Compare to the previous model →