Yamaha NS 50 R Aerox (1997–2015): A Sporty Legacy of Two-Stroke Thrills

For nearly two decades, the Yamaha NS 50 R Aerox carved its niche as a spirited, youth-oriented scooter that blended sporty aesthetics with the raw charm of two-stroke engineering. Designed for urban agility and weekend adventures, this 50cc machine became a cult favorite among riders seeking a lightweight, modifiable platform. After spending time with a well-maintained 2013 Aerox R model, it’s clear why this scooter still resonates with enthusiasts—even years after its discontinuation.

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Design & Ergonomics: Aggressive Lines, Practical Touches

The Aerox’s design screams “sport scooter” with its sharp angles, exposed frame elements, and dual-seat configuration. Over its 18-year run, Yamaha experimented with bold color schemes like Red/White, Tech Armor/Black, and Blue/Black, often pairing them with matte finishes or racing decals for a track-inspired look. The 2013 update introduced a redesigned dual seat with a slightly more aggressive riding position, tilting the rider forward for better control during spirited rides.

Despite its sporty intentions, practicality isn’t sacrificed. The under-seat storage comfortably swallows a full-face helmet—a rarity in 50cc scooters—and the high-spec LCD dash (introduced in later models) provides crisp readouts for speed, fuel, and engine diagnostics. At 97 kg (214 lbs) wet weight, the Aerox feels light enough for beginners yet substantial enough to handle bumps without feeling flimsy.

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Engine Performance: The Two-Stroke Screamer

Powered by a liquid-cooled, single-cylinder two-stroke engine, the Aerox’s 49.2cc powerplant delivers a peak output of 3.3 HP (2.4 kW) @ 6,750 RPM in its later iterations, with torque rated at 3.5 Nm (2.6 ft.lbs). Earlier models (pre-2010) dialed back to 2.7 HP, but all variants share that signature two-stroke “hit” as the revs climb past 5,000 RPM.

The engine’s 12:1 compression ratio (in later models) and Gurtner carburetor ensure snappy throttle response, though tuning is essential for optimal performance. Unlike four-stroke rivals, the Aerox rewards riders who keep it in the powerband—zipping from 0–50 km/h (0–31 mph) with surprising urgency. Liquid cooling keeps temperatures in check during sustained high-rev runs, a feature that sets it apart from air-cooled competitors.

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Handling & Ride Quality: Urban Playground Dominator

With a 1256 mm (49.4-inch) wheelbase and 13-inch alloy wheels, the Aerox strikes a balance between stability and flickability. The telescopic front fork and unit swing rear suspension offer 80 mm (3.1 inches) and 60 mm (2.4 inches) of travel, respectively—enough to absorb potholes but tuned for taut cornering.

Riding through tight city streets, the Aerox feels like a extension of your body. The 130/60-13 front and 140/60-13 rear tires provide ample grip, while the hydraulic disc brakes (single discs front and rear) deliver confident stopping power. At higher speeds (50–60 km/h or 31–37 mph), the chassis remains composed, though crosswinds can nudge its lightweight frame.

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Competition: How the Aerox Stacks Up

The Aerox faced fierce rivals in the 50cc sport scooter segment. Here’s how it compares:

1. Honda Vision 50:
   The Vision prioritizes fuel efficiency and reliability with its four-stroke engine but lacks the Aerox’s sporty edge. Handling is softer, and the design is more utilitarian.

2. Aprilia SR 50:
   Aprilia’s offering matches the Aerox’s liquid-cooled two-stroke setup but adds modern tech like fuel injection (in later models). However, Aprilia parts are pricier and harder to source.

3. Peugeot Speedfight 3:
   A styling icon with punchy acceleration, the Speedfight rivals the Aerox’s fun factor. Yet its air-cooled engine overheats quicker during aggressive rides.

Verdict: The Aerox strikes a sweet spot between affordability, tunability, and sporty handling. While not the fastest or most modern, its aftermarket support and cult status give it an edge for enthusiasts.

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Maintenance: Keeping the Two-Stroke Alive

Owning an Aerox means embracing two-stroke upkeep. Here’s what to prioritize:

1. Oil & Lubrication:
   The separate lubrication system requires regular checks of the oil tank (use JASO-FD-certified two-stroke oil). Neglect this, and you’ll risk engine seizures.

2. Carburetor Tuning:
   The Gurtner carb is reliable but sensitive to altitude/temperature changes. A performance air filter (available at MOTOPARTS.store) can unlock extra power but requires rejetting.

3. Cooling System:
   Flush the liquid coolant annually to prevent corrosion. Check for leaks around the radiator hoses.

4. Belt & Drivetrain:
   The V-belt drive needs replacement every 8,000–10,000 km (5,000–6,200 miles). Upgrade to a kevlar-reinforced belt for durability.

5. Spark Plugs:
   NGK BR8HS plugs are standard. Replace them every 3,000 km (1,860 miles) for consistent ignition.

Pro Tip: Swap the stock exhaust for an aftermarket expansion chamber (like the Yasuni R2) to boost mid-range torque. Pair it with a high-flow air filter for best results.

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Final Thoughts: A Timeless Canvas for Riders

The Yamaha Aerox isn’t just a scooter—it’s a blank slate for customization. From wild graphics kits to big-bore 70cc upgrades, this platform invites experimentation. While newer electric scooters dominate headlines, the Aerox’s analog thrill and mechanical simplicity keep it relevant. For riders craving a raw, engaging experience, few 50cc machines deliver like this Yamaha icon.

Ready to personalize your Aerox? Explore MOTOPARTS.store’s curated selection of performance parts, styling accessories, and maintenance kits to make your scooter truly yours.

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Specifications sheet

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