Yamaha CW 50 BW (2011-2018): A Nostalgic Dance with Practicality

Introduction

The Yamaha CW 50 BW, sold under variants like the BWs Easy, BWs Naked, and BWs Original, is a scooter that embodies the spirit of minimalist urban mobility. Produced between 2011 and 2018, this 50cc two-stroke machine isn’t about speed records or cutting-edge tech—it’s about simplicity, accessibility, and a no-nonsense approach to city commuting. After spending a day weaving through traffic and navigating narrow streets on a well-maintained 2016 BWs Naked, it’s clear why this scooter has carved out a loyal following among riders who value practicality over pretension.

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Design & Ergonomics: Function Over Flair

The CW 50 BW’s design language is unmistakably utilitarian. The twin headlights (a signature across most variants) give it a bug-eyed charm, while the steel frame and compact dimensions (1,685 mm/66.3 inches long) make it look like a workhorse ready to tackle urban jungles. The Midnight Black, Red, White, and occasional vibrant options like Aluminum/Pink (on special editions) keep it visually fresh without straying into extravagance.

Seating is where this scooter shines. The 768 mm (30.2-inch) seat height is low enough for riders as short as 5’2” to flat-foot comfortably. The padded dual seat on later Naked and Original models is surprisingly plush for short commutes, though multi-hour rides might have you craving extra cushioning. Passenger grab bars and a luggage/helmet hook under the seat add practicality—perfect for strapping down a grocery bag or securing a half-face helmet.

Standout features include the minimalist instrument pod (a speedometer, fuel gauge, and basic indicators) and the switch to alloy wheels on certain trims, which slightly reduce unsprung weight. The overall aesthetic is retro-modern, like a Vespa’s less fashionable but more reliable cousin.

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Engine & Performance: The Two-Stroke Pulse

At the heart of the CW 50 BW lies a 49.2cc air-cooled two-stroke single-cylinder engine, producing 3.2 HP (2.4 kW) at 6,500 RPM and 3.6 Nm (2.7 ft.lbs) of torque at 6,000 RPM. These numbers won’t set pulses racing, but they tell only half the story. The two-stroke’s character is its defining trait: a raspy exhaust note, instant throttle response, and a lighthearted buzz that feels alive under you.

Starting the engine depends on the variant—kick-only on base models or electric/kick combo on upgraded trims. The CDI ignition ensures reliable cold starts, though the kick lever becomes a nostalgic ritual on older examples. The Gurtner carburetor is straightforward, if a bit finicky in extreme temperatures.

Performance-wise, expect a top speed of 45-50 km/h (28-31 mph) on flat roads—enough to keep up with city traffic but hesitant on steep inclines. The V-belt automatic transmission is seamless, requiring zero input beyond twisting the throttle. Fuel economy hovers around 40-45 km/l (94-106 mpg), making the 5.3-liter (1.4-gallon) tank good for 200+ km (124+ miles) between fills.

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Handling & Ride Quality: Agile, But Keep Expectations Grounded

Weighing 82 kg (180.8 lbs) wet, the CW 50 BW feels almost tossable. The 10-inch wheels (120/90 front, 130/80 or 150/80 rear depending on trim) and 70 mm (2.8 inches) of suspension travel front/rear handle potholes better than expected, though sharp bumps can jolt through the steel frame.

The telescopic fork and unit swing rear suspension prioritize durability over comfort. Lean angles are limited, but the scooter carves through tight corners with confidence, aided by the drum brakes (front disc on Naked/Original trims). Stopping power is adequate for its speed, though rainy days demand caution—upgrading to aftermarket pads is wise for aggressive riders.

Ground clearance sits at 124 mm (4.9 inches), sufficient for curbs but not for ambitious off-roading. The riding position is upright, with narrow handlebars offering easy leverage for filtering through traffic.

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Competition: How Does the BWs Stack Up?

In the 50cc scooter segment, the CW 50 BW faces stiff competition:

1. Honda Vision 50:
   Honda’s four-stroke rival trades the Yamaha’s two-stroke pep for quieter operation and lower emissions. The Vision feels more refined but lacks the BWs’ mechanical charm. Maintenance is simpler on the Honda, though.

2. Piaggio Typhoon 50:
   The Typhoon leans into sporty aesthetics with sharper styling and a larger underseat storage compartment. Its liquid-cooled engine offers better thermal management but adds complexity.

3. Kymco Agility 50:
   Kymco’s offering undercuts the Yamaha on price and includes modern touches like LED lighting. However, the Agility’s build quality feels plasticky compared to the BWs’ rugged steel frame.

Where the Yamaha Wins:
- The two-stroke engine’s simplicity and ease of repair.
- Lightweight design for effortless maneuverability.
- Retro styling that ages better than overtly modern rivals.

Where It Lags:
- Emissions compliance in regions phasing out two-strokes.
- Lack of storage compared to bulkier maxi-scooters.

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Maintenance: Keeping the Two-Stroke Alive

Owning a CW 50 BW means embracing its old-school mechanics. Here’s what to watch:

1. Engine Lubrication:
   The separate oil injection system requires regular checks. Use high-quality two-stroke oil to prevent seizures. MOTOPARTS.store offers synthetic oils that reduce smokey exhaust.

2. Carburetor Tuning:
   The Gurtner carb can clog if left unused. A rebuild kit or aftermarket Mikuni replacement (available here) improves reliability.

3. Belt & Rollers:
   The CVT belt lasts ~10,000 km (6,200 miles). Upgrade to a kevlar-reinforced belt for smoother acceleration.

4. Brake Upgrades:
   Swap drum brake shoes for sintered variants or install a front disc conversion kit (compatible with Naked models).

5. Two-Stroke Legacy:
   Decarbonize the exhaust periodically and check compression (should be ~7.2:1). A worn cylinder? We stock OEM-sized pistons and rings.

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Customization & Accessories

Personalize your BWs with:
- Comfort Seats: Gel-padded covers for longer rides.
- Performance Exhausts: Boost mid-range torque (and turn heads).
- LED Lighting Kits: Enhance visibility of those twin headlights.
- Rear Racks: Add cargo capacity for deliveries or weekend getaways.

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Final Thoughts

The Yamaha CW 50 BW isn’t a scooter for everyone—it’s for riders who appreciate analog simplicity in a digital age. Its two-stroke soul, rugged build, and unapologetic focus on function make it a standout in the 50cc class. While newer scooters offer more polish, few match the BWs’ character and repairability.

For owners, MOTOPARTS.store is your partner in keeping this icon alive. From carb jets to custom grips, we’ve got the essentials to make your BWs uniquely yours—and keep it running for another decade.

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