MBK 50 Booster Rocket (1993-2008): A Timeless Urban Companion

Introduction

The MBK 50 Booster Rocket, produced from 1993 to 2008, is a cult classic in the 50cc scooter world. Designed for urban mobility with a rebellious edge, this two-stroke machine carved its niche as a lightweight, practical, and surprisingly fun ride. Over its 15-year production run, it evolved into multiple variants—Booster Naked, Booster X, and Booster NG—each tweaking the formula without losing the core DNA. Having spent time with a well-preserved 2007 Booster Rocket, I can confidently say this scooter still holds up as a zippy, no-nonsense commuter with a personality that’s hard to ignore. Let’s dive into what makes this French icon tick.

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Design: Compact, Agile, and Unapologetically Utilitarian

The Booster Rocket’s design screams “function first,” but it’s far from bland. With a dry weight of just 75–80 kg (165–176 lbs) and a wheelbase ranging from 1,172 mm (46.1 inches) to 1,280 mm (50.4 inches) depending on the variant, it’s a masterclass in compact engineering. The standout feature is its accessibility: a seat height of 768 mm (30.2 inches) on earlier models and a lower 750 mm (29.5 inches) on the Booster X makes it approachable for riders of all sizes.

Color options like Jet Black, Liquid Ruby, and Candy Blue gave it a playful vibe, while the Naked variants leaned into minimalist aesthetics with exposed metal finishes. The body panels are simple and modular—a blessing for DIY repairs or customization. Storage is limited to a small under-seat compartment, but the 5.3–24.6L (1.4–6.5 US gal) fuel tank (varies by model) ensures fewer stops at the pump.

The Booster X, with its liquid-cooled four-stroke engine, added bulk (87 kg / 191 lbs) and a slightly stretched frame, but retained the same agile proportions. Meanwhile, the NG (“Next Generation”) model bumped ground clearance to 153 mm (6 inches), making it surprisingly capable over cobblestones or potholed streets.

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Engine and Performance: Two-Stroke Thrills (and Occasional Chores)

At its core, the Booster Rocket is powered by a 49cc single-cylinder two-stroke engine—a configuration that’s both its greatest strength and weakness. Let’s break it down:

• Power Delivery: The standard two-stroke models (Booster, Naked, NG) produce 3.2–3.6 HP (2.3–2.6 kW) at 6,500–6,800 RPM, with torque peaking at 3.6–4.0 Nm (2.7–3.0 ft.lbs). These numbers don’t sound impressive on paper, but the two-stroke’s instantaneous throttle response makes accelerating from standstill feel punchy. You’ll hit 50–55 km/h (31–34 mph) effortlessly—enough to keep up with city traffic.
• The Four-Stroke Oddball: The Booster X swapped the two-stroke for a 49cc SOHC four-stroke engine with 3.7 HP (2.7 kW). It’s smoother and quieter, but the powerband feels lethargic compared to the raw buzz of its two-stroke siblings.
• Transmission: All models use a belt-driven automatic transmission, ideal for stop-and-go traffic. No gears, no clutch—just twist and go.

The trade-off? Two-strokes demand attention. The separate lubrication system requires pre-mixing oil with fuel (unless you have an auto-lube variant), and the 7.2:1 compression ratio means regular decarbonizing is a must. But for enthusiasts, the ritual is part of the charm.

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Ride Experience: Urban Nimbleness Meets Raw Character

Swing a leg over the Booster Rocket, and you’re greeted by a no-frills cockpit—a speedometer, basic lights, and a keyhole. The seat is firm but forgiving for short hops. Thumb the electric starter (or kick it old-school), and the engine sputters to life with a metallic rasp that’s pure two-stroke nostalgia.

• Handling: The 10-inch or 12-inch wheels (depending on trim) and short wheelbase make flicking through traffic a joy. The Booster NG’s 130/90-10 rear tire adds stability at higher speeds, while the Booster X’s 120/90-10 setup feels more planted on wet roads.
• Suspension: The hydraulic telescopic fork and hydraulic swingarm rear offer 70–80 mm (2.8–3.1 inches) of travel—enough to soak up minor bumps but firm enough to avoid wallowing.
• Brakes: Most models pair a 180 mm front disc with a 110 mm rear drum. Stopping power is adequate, though the rear drum can feel mushy after repeated use.

On the road, the Booster Rocket thrives in tight spaces. Weaving through gridlocked traffic feels intuitive, and the upright riding position keeps fatigue at bay. The engine’s vibrations add character, though they might numb your hands on longer rides.

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Competition: How the Booster Rocket Stacks Up

The 50cc scooter segment is fiercely competitive. Here’s how the Booster Rocket holds its ground:

1. Peugeot Speedfight 50: The Booster’s archrival. Similar two-stroke performance, but the Speedfight’s sportier design and stiffer suspension appeal to younger riders. However, the Booster’s simpler mechanics make it easier to maintain.
2. Yamaha Aerox 50: A water-cooled two-stroke with sharper acceleration. The Aerox feels more “premium” but costs significantly more in the aftermarket parts department.
3. Piaggio Ciao: A four-stroke workhorse. The Ciao is bulletproof but lacks the Booster’s zest.

The Booster Rocket’s ace? Customization. Its straightforward design and interchangeable parts (shared with Yamaha’s Minarelli engines) make it a blank canvas for tuners. From big-bore kits to retro body panels, MOTOPARTS.store has everything to personalize your ride.

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Maintenance: Keeping the Two-Stroke Flame Alive

Owning a Booster Rocket is a labor of love. Here’s what to watch:

• Oil and Fuel Mix: Use high-quality 2T oil at a 2–3% ratio. The Gurtner PY-12 carburetor is reliable but needs occasional cleaning.
• Spark Plugs: Stick with NGK BR8HS or iridium BR8HIX plugs. Check the 0.6 mm electrode gap every 1,000 km (620 miles).
• Brakes: Upgrade to sintered pads for the front disc. The rear drum’s Ø 110 mm shoes are widely available.
• Suspension: The 70 mm rear wheel travel can be improved with aftermarket shocks for heavier riders.

Pro Tip: Decarbonize the exhaust and cylinder head annually to prevent power loss. MOTOPARTS.store stocks OEM-compatible gaskets and tools for the job.

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Conclusion: A Scooter That Rewards the Enthusiast

The MBK 50 Booster Rocket isn’t just a relic—it’s a living testament to the golden era of two-stroke scooters. Its lightweight frame, peppy engine, and endless customization potential make it a joy for urban riders who don’t mind getting their hands dirty. While newer four-strokes might be “easier,” the Booster’s raw personality and mechanical simplicity keep it relevant.

Whether you’re restoring a 1993 original or tweaking a 2008 NG, MOTOPARTS.store has the parts to keep your Booster Rocket flying. From performance upgrades to everyday essentials, we’ve got your back. Now, go twist that throttle and let that two-stroke sing!

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Specifications sheet

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