Derbi GP1 50 LC [2005 – 2012]: A Sporty Urban Companion That Still Turns Heads

Introduction: The Spanish Spark Plug

When Derbi unleashed the GP1 50 LC in 2005, it wasn’t just another scooter—it was a statement. Born from Spain’s rich motorsport heritage, this liquid-cooled two-stroke machine blended commuter practicality with a racing soul. Designed for riders who wanted to stand out in city traffic while enjoying nimble handling, the GP1 50 LC became a staple for European teenagers (thanks to its A1-license-friendly 50cc displacement) and urban riders craving style. Over its eight-year production run, Derbi tweaked aesthetics and specs slightly across sub-models like the GP1 50 Racing and GP1 50 Open, but the core DNA remained: a lightweight, sporty scooter with aggressive styling. Let’s dissect why this Spanish stallion still deserves attention.

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Design & Aesthetics: Small Scooter, Big Attitude

The GP1 50 LC’s design screams “pocket rocket.” With its angular bodywork, twin headlights (on later models), and minimalist tail section, it mimics the aggression of larger sport bikes. The aluminum beam frame adds a premium touch, while color options like racing red, matte black, and neon yellow ensured visibility in crowded streets. Even today, the GP1 looks modern compared to curvier rivals.

Stand back, and you’ll notice the inverted front forks—a rarity in 50cc scooters—and chunky 14-inch front wheels. The cockpit is simple but purposeful, with analog gauges and a flat, sport-inspired seat. Storage is limited (no underseat compartment here), but the GP1 prioritizes form over function—a trade-off that resonates with its target audience.

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Riding Experience: Two-Stroke Thrills in the Concrete Jungle

Engine & Performance

The 49.4cc single-cylinder two-stroke engine is the star. With 4.5 PS (3.2 kW), it’s no powerhouse, but the liquid cooling and 10.5:1 compression ratio let it sing. Throttle response is snappy, thanks to the 17.5mm carburetor, and the automatic CVT transmission eliminates gear-shifting hassles.

Twist the throttle, and the GP1 leaps forward with that classic two-stroke buzz—a visceral experience missing from modern four-strokes. Top speed hovers around 70 km/h (43 mph), perfect for city limits. On hills, momentum dips, but the engine’s willingness to rev compensates. Fuel economy? Expect 30-35 km/l (70-82 mpg), though aggressive riding drains the 8-11L tank faster.

Handling & Comfort

Weighing 103-115 kg (227-254 lbs), the GP1 feels flickable. The inverted forks and monoshock rear (with 70-80mm travel) handle potholes better than expected, though rough roads still jolt through the stiff seat. The 120/70-14 front and 140/60-13 rear tires provide surprising grip, and the wheelbase (~1,330 mm / 52.4 inches) balances stability and agility.

Braking varies by model: earlier versions used a rear drum, while later trims upgraded to discs. The radially mounted front caliper (on Racing models) offers confident stops, though the rear requires a firm stomp.

At 785-835 mm (30.9-32.9 inches), the seat height accommodates shorter riders, but the narrow seat and sporty posture limit long-distance comfort. This is a scooter built for 30-minute sprints, not cross-country tours.

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Ownership Experience: Love It or Tweak It

Reliability & Quirks

Two-strokes demand attention. The separate oil injection system requires regular checks, and the carburetor can clog if neglected. Liquid cooling adds reliability in stop-and-go traffic, but older GP1s may develop leaks. Parts are plentiful, though, and the engine’s simplicity makes DIY repairs feasible.

Owners praise the GP1’s durability but note that vibration loosens bolts over time—a recurring theme in high-revving two-strokes. The exhaust note, while addictive, drones at steady speeds.

Customization Potential

Here’s where MOTOPARTS.store shines. Swapping the stock carb for a 19mm variant or adding an aftermarket expansion chamber can unlock hidden pep. Upgraded brake pads (like EBC’s sintered offerings) improve stopping power, while a taller windscreen makes highway blips more tolerable.

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Competition: How Does the GP1 Stack Up?

Aprilia SR 50

Aprilia’s SR 50 rivals the GP1 with sharper styling and a similar liquid-cooled two-stroke. However, the SR 50’s higher price and complex Piaggio electronics make the Derbi a simpler, more affordable choice for tinkerers.

Peugeot Speedfight 3

The Speedfight 3 leans into practicality with underseat storage and a four-stroke option. It’s smoother but lacks the GP1’s raw character. For riders prioritizing low maintenance over excitement, Peugeot wins.

Yamaha Aerox

Yamaha’s Aerox matches the GP1’s sportiness but uses a four-stroke engine. It’s quieter and more fuel-efficient but feels sluggish compared to the Derbi’s lively two-stroke.

Verdict: The GP1 50 LC carves its niche with race-inspired hardware and tuner-friendly mechanics. It’s for riders who value personality over polish.

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Maintenance: Keep the Two-Stroke Alive

Key Considerations

1. Oil Injection System: Use high-quality 2T oil (synthetic blends recommended) and check the pump’s calibration annually.
2. Cooling System: Flush the radiator every two years and monitor hoses for cracks.
3. Carburetor: Clean the jet every 3,000 km (1,864 miles) to prevent clogging. Consider a Mikuni replacement for smoother idle.
4. Brakes: Replace DOT 4 fluid yearly. Upgrade to braided steel lines for firmer lever feel.
5. Tires: The stock 120/70-14 front and 140/60-13 rear favor grip over longevity. Swap to Michelin City Pros for better wet performance.

MOTOPARTS.store Recommendations

• Performance: Malossi 70cc Big Bore Kit (for those seeking legal loopholes)
• Style: LED turn signals and a smoked windscreen
• Comfort: Gel seat cover or aftermarket shock absorbers

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Final Thoughts: A Cult Classic in the Making

The Derbi GP1 50 LC isn’t perfect—it’s loud, thirsty, and cramped. But that’s the point. In an era of sterile electric scooters, the GP1 reminds us that riding should be visceral. Its flaws are charms, and its simplicity invites modification. Whether you’re reliving your teenage years or discovering two-stroke joy for the first time, the GP1 delivers grins per euro like few others.

Ready to personalize your GP1? Explore MOTOPARTS.store’s curated selection of upgrades—because even legends can use a tweak or two.

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Specifications sheet

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