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Piaggio NRG
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| Manufacturer | Piaggio |
|---|---|
| Production | 1994–2020 |
| Assembly | Pontedera, Italy |
| Predecessor | Piaggio Quartz |
| Class | Scooter |
| Engine | 49 cc (3.0 cu in) two stroke, single, air- or liquid-cooled with a Dell'Orto or Weber carburetor or direct fuel injection (mc3 PureJet, NRG Power PureJet) |
| Bore / stroke | 40.0 mm × 39.3 mm (1.57 in × 1.55 in) |
| Ignition type | Capacitor discharge electronic ignition (CDI) |
| Transmission | Continuously variable automatic transmission (CVT) |
| Suspension | Front: Upside down telescopic Rear: Swingarm, single shock absorber[1] |
| Brakes | Front: Single disc Rear: Drum or single disc |
| Tyres | Front: 130/60-13 (120/70-13 for NRG Power) Rear: 130/60-13 (140/60-13 for NRG Power) |
| Wheelbase | 1.280 m (4 ft 2.4 in) |
| Weight | 94 kg (207 lb)[1] (dry) |
| Fuel capacity | 5.5 L (1.2 imp gal; 1.5 US gal) 6.7 L (1.5 imp gal; 1.8 US gal) (NRG Power) |
| Oil capacity | 1.3 L (0.29 imp gal; 0.34 US gal) |
| Related | Piaggio NTT Piaggio Typhoon Gilera Typhoon Gilera Storm |
The Piaggio NRG is a scooter made by Piaggio from 1994 to 2020. The name NRG is an acronym for eNeRGy .
History
[edit]The first model (mc1) used a liquid-cooled, two-stroke engine. The mc2 differed from the mc1 only visually and later models (since 1998) had optional air-cooling and rear disc brakes (the Hi-Per2 engine). The mc3 saw not only further visual improvements, but also a rev counter, the new Hi-Per 2 engine, air-cooling (optional), rear disc brakes (optional) and direct fuel injection (optional). The NRG Power (introduced in 2005) changed drastically from the fairly similar 3 previous models. The NRG Power and mc3 were supplied in three versions:
- NRG Power DT / NRG mc3 DT (air-cooled, rear drum brakes)
- NRG Power DD / NRG mc3 DD (liquid-cooled, rear disc brakes. DD stands for "Double Disc")
- NRG Power PureJet / NRG mc3 PureJet (direct fuel injection)
Piaggio and Gilera have produced models similar to the mc1:
- NTT (10 inch rims and a front splitter)
- Piaggio Typhoon / Gilera Typhoon (10 inch rims, different front body, air cooling)
- Piaggio Storm / Gilera Storm (13 inch rims, Typhoon front body, air cooling)
Models
[edit]- Piaggio NRG mc1 (1994–1996)
- Piaggio NRG mc2 (1996–1998)
- Piaggio NRG mc2 DD / mc2 extreme (1998–2000)
- Piaggio NRG mc3 DD / DT / PureJet
- Piaggio NRG Power DD / DT / PureJet (since 2005)
- Piaggio NRG mc4
References
[edit]- ^ a b Mather, Phil (2004). Twist and Go (automatic transmission) Scooters 50 to 250 cc: Service and Repair Manual. Haynes. p. Data 43. ISBN 978-1844250820.
External links
[edit]Piaggio NRG
View on Grokipediafrom Grokipedia
History
Origins and development
The Piaggio NRG was introduced in 1994 as Piaggio's sporty urban scooter line, targeting the European moped market with a focus on dynamic performance and youthful appeal.[4] The name NRG underscores its emphasis on energetic and high-performance characteristics designed to attract younger riders.[4] Developed in response to the rising demand for compact, agile scooters in the 1990s urban mobility landscape, the NRG drew from Piaggio's existing TPH platform to deliver aggressive styling and enhanced handling for city commuting and short trips.[4][5] Initial engineering decisions prioritized reliability and ease of use, incorporating a 49 cc two-stroke single-cylinder engine with liquid cooling in the mc¹ version for better thermal management during spirited riding.[6] This was paired with a continuously variable transmission (CVT) automatic system, allowing seamless acceleration without manual gear shifting to suit novice urban riders.[7] These foundational choices positioned the NRG as a benchmark for sporty 50 cc scooters, later evolving into variants like the mc³ and NRG Power series.[1]Production and evolution
Production of the Piaggio NRG began in 1994 at the company's primary manufacturing facility in Pontedera, Italy, marking the start of a 26-year production run that established the model as a staple in the urban scooter segment.[8][9] The initial models featured a liquid-cooled two-stroke engine, but by the mid-1990s, Piaggio introduced optional air-cooling options in the MC² series to simplify maintenance and reduce costs while maintaining performance.[10] Around 1998, the lineup expanded with DD variants equipped with rear disc brakes, enhancing stopping power and safety for sportier riding dynamics.[7] In the early 2000s, Piaggio addressed evolving emissions standards by adopting direct fuel injection technology through the PureJet system, introduced in the NRG 50cc models around 2002 to comply with stricter Euro 2 and upcoming Euro 3 regulations while preserving the two-stroke engine's efficiency and power delivery.[11] This update significantly reduced pollutant emissions and fuel consumption compared to carbureted predecessors. A major redesign arrived in 2005 with the launch of the NRG Power line, which featured a completely revised chassis for improved rigidity and handling, along with a larger fuel tank to extend range for longer urban commutes.[12] The NRG's production concluded in 2020, driven by increasingly stringent Euro 4 and Euro 5 emissions regulations that rendered two-stroke engines like the NRG's obsolete due to their higher pollutant output. Piaggio shifted focus toward four-stroke alternatives, such as the Typhoon and Zip models, and emerging electric options to meet market demands for cleaner, more sustainable mobility.[13] This transition aligned with broader industry trends and Piaggio's strategic emphasis on larger-displacement and electrified vehicles.[9]Design and features
Chassis and styling
The Piaggio NRG features a robust chassis constructed from a single-cradle structure of high-resistance welded tubular steel, reinforced with stamped sheet metal for enhanced rigidity and lightweight handling in urban settings.[14][15] The front suspension employs an upside-down hydraulic telescopic fork, providing precise steering and stability, while the rear utilizes a single-sided swingarm paired with a preload-adjustable hydraulic shock absorber to manage weight transfer during acceleration and braking.[15][16] Styling on the NRG emphasizes a sporty, supersport-inspired aesthetic with aggressive angular bodywork and durable plastic fairings that contribute to its compact, dynamic profile.[1] Early iterations showcase a racing-derived compact form with sharp lines and a high-mounted exhaust for a performance-oriented silhouette, complemented by a practical step-through platform.[3] Over time, the design evolved in the Power series to incorporate bolder graphics, LED lighting accents for improved visibility, and refined contours that maintain the gritty urban character while enhancing visual appeal.[1][17] Ergonomic considerations prioritize accessibility and city maneuverability, with a seat height of 750-810 mm (adjustable in some variants) accommodating a wide range of riders and facilitating flat-footing at stops.[14] Under-seat storage is sufficient for small items or a helmet in select configurations, while the 13-inch wheels promote agile responsiveness on tight streets.[3][14] Safety elements include an integrated braking system with a standard 240 mm front hydraulic disc and optional 175 mm rear disc or drum, depending on variant, for balanced stopping power.[14] Anti-vibration mounts on key components reduce rider fatigue during extended use.[15]Engine and drivetrain
The Piaggio NRG features a lineup of 49 cc single-cylinder two-stroke engines, available in air-cooled (DT) or liquid-cooled (DD) configurations.[14] Early models utilize a Dell'Orto or Weber carburetor for fuel delivery, while later variants incorporate Piaggio's PureJet direct injection system to meet stricter emissions standards.[1] These engines produce between 3 and 3.3 kW (4 to 4.5 hp) at 7,000 to 8,000 rpm, with torque output around 4 to 5 Nm at 6,000 rpm, providing responsive power for urban mobility.[14][18] The drivetrain employs a continuously variable transmission (CVT) system, consisting of an automatic expandable pulley variator, V-belt, torque server, centrifugal clutch, and final gear reduction to the rear wheel.[15] This setup ensures smooth, seamless power delivery without manual gear shifting, optimizing the two-stroke engine's high-revving characteristics for quick starts in city traffic.[3] Performance highlights include a top speed of 45 to 60 km/h, electronically limited in compliance with moped regulations, along with rapid acceleration suited to frequent stops and urban navigation.[3] Fuel efficiency typically ranges from 30 to 40 km/L, benefiting from the efficient two-stroke design and lightweight construction.[3][18] Maintenance for the two-stroke engine requires attention to the automatic oil injection system, which mixes lubricant with fuel at a ratio varied by engine speed and throttle via a crankshaft-driven pump, eliminating manual premixing but necessitating periodic checks of the oil reservoir.[19] Common issues involve carburetor tuning on pre-PureJet models to balance performance and emissions compliance, often requiring adjustments to jetting for optimal air-fuel mixture under varying conditions.[15]Models and variants
Early models (mc¹ and mc²)
The Piaggio NRG mc¹ and mc² series represented the scooter's foundational generation, launched in 1994 as a sporty, urban-oriented model derived from the Piaggio Typhoon with added liquid-cooling and larger 13-inch wheels for improved stability. These early variants prioritized lightweight construction and agile handling, appealing to novice riders seeking an affordable entry into powered two-wheelers. Produced until 2000, they established the NRG's reputation for racing-inspired aesthetics and reliable performance in European cities. The mc¹ (1994–1996) served as the launch model, equipped with a single-cylinder, liquid-cooled two-stroke engine of 49.5 cc displacement, featuring reed valve intake, carburetor fueling, and CVT transmission with centrifugal clutch. It included a front disc brake (220 mm diameter) and rear drum brake, paired with an upside-down hydraulic front fork and rear monoshock suspension for basic urban commuting. Minimalist styling, characterized by simple body panels and exposed mechanical elements, targeted entry-level urban riders, with a dry weight of around 94–95 kg and a fuel tank capacity of 6.5–7 liters. Electric and kick starting provided versatility in daily use. The mc² (1996–1998) built on the mc¹ platform with minor refinements, including updated fairings, graphics, and a slightly modernized sportier appearance while maintaining the core liquid-cooled two-stroke engine and drivetrain. Cooling efficiency saw marginal enhancements through optimized radiator placement, contributing to better thermal management during extended rides. Optional accessories, such as expanded windscreens, were introduced to cater to varied commuting needs, enhancing rider comfort without altering the scooter's compact footprint. The mc² DD and Extreme variants (1998–2000) elevated handling with the addition of a rear disc brake—denoted by "DD" for double disc—alongside upgraded suspension components for more responsive sporty dynamics. The Extreme trim featured distinctive racing decals and bold color schemes, appealing to enthusiasts, while the overall dry weight remained in the 90–94 kg range for nimble maneuverability. These updates refined braking and stability without major redesigns. In Europe, the early NRG models gained popularity among young and novice riders due to their compliance with entry-level moped licensing categories for 50 cc vehicles, bolstered by accessible pricing that made them an economical choice for urban transport. Later series would transition to air-cooling for simplified maintenance.mc³ series
The mc³ series marked a transitional phase in the Piaggio NRG lineup, spanning production from 2000 to 2005, with enhancements in braking systems and emission controls to address evolving regulatory demands while maintaining the scooter's sporty urban appeal. These models built on the braking foundations of the prior mc² generation by standardizing disc options and introducing air-cooled variants for efficiency. Key variants included the DD, DT, and PureJet, each tailored to balance performance, cost, and environmental standards. The mc³ DD, produced from 2000 to 2002, featured double disc brakes as standard on both front (220 mm) and rear (175 mm) wheels for superior stopping power in city conditions. It was powered by a liquid-cooled 49.4 cc two-stroke single-cylinder engine producing 3.3 kW at 7,250 rpm, with a compression ratio of 10.3:1 and bore/stroke dimensions of 40 mm x 39.3 mm. The updated dashboard incorporated analog gauges for speed, fuel level, and warnings, improving rider feedback over earlier iterations. The mc³ DT, manufactured from 2002 to 2004, offered an air-cooled variant designated for "disc and tamburo" (drum rear brake), with a 220 mm front disc and expanding drum at the rear to prioritize cost reduction and accessibility for entry-level markets. This model achieved a curb weight of approximately 92 kg, lighter than its liquid-cooled sibling due to simplified cooling, while retaining the 49.4 cc two-stroke engine at 3 kW output for adequate urban performance. Its design emphasized affordability without sacrificing core handling traits. Introduced in 2002 and continuing through 2005, the mc³ PureJet variant pioneered direct fuel injection in a two-stroke scooter engine, utilizing electronic control for precise metering and smoother throttle response compared to carbureted predecessors. This liquid-cooled 49.5 cc unit complied with early Euro 3 emission standards by reducing unburnt hydrocarbons and particulates, achieving improved fuel economy of around 35 km/L in real-world urban use. Optional digital displays enhanced instrumentation, and the model's efficiency made it particularly popular for commuting in dense markets like Italy and Spain.NRG Power series
The NRG Power series, launched in 2005 as the successor to the mc³ generation, underwent a major redesign that emphasized enhanced performance, safety, and adaptability to regulatory changes, positioning it as Piaggio's flagship 50cc sport scooter through 2020. This final generation featured a restyled chassis with greater ground clearance for improved urban handling and a more aggressive aesthetic, while maintaining the line's reputation for agile, youth-oriented mobility. Variants were differentiated by cooling systems, braking setups, and fuel delivery methods to address diverse market demands, from performance-focused riders to budget-conscious commuters.[20] The NRG Power DD, produced from 2005 to 2017, incorporated a liquid-cooled two-stroke 49 cc engine delivering 3 kW (4.08 hp) at 7,000 rpm, enabling superior highway speeds and acceleration compared to air-cooled predecessors. It boasted double disc brakes—a 240 mm front and 175 mm rear—for reliable stopping power, an expanded 6.7 L fuel tank supporting longer rides, and updated bodywork that elevated ground clearance with an adjustable seat height of 750-795 mm for better obstacle navigation. These upgrades made the DD a preferred choice for riders seeking sportier dynamics.[14][21][2] In contrast, the NRG Power DT variant, available from 2005 to 2017, adopted an air-cooled engine with a drum rear brake to prioritize affordability and simplicity, appealing to entry-level users without compromising core agility. Weighing around 103 kg, it retained the series' 6.5 L fuel tank and CVT transmission but focused on cost-effective maintenance. A key update in 2017 integrated Euro 4-compliant carburetor refinements, ensuring continued market viability amid tightening emissions rules.[22][23] The NRG Power PureJet, introduced in 2005 and extending to 2020, advanced the lineup with Piaggio's PureJet electronic fuel injection system—evolving from mc³ origins—for precise metering and reduced emissions, achieving Euro 4 compliance by 2018 and Euro 5 in final iterations from 2019 onward. This 49 cc liquid-cooled setup included sophisticated electronic fuel management for smoother throttle response and efficiency, with optional start-stop functionality in select models to minimize idling fuel use in traffic. Final iterations added LED lighting for enhanced nighttime safety and a contemporary look, solidifying its role in eco-conscious urban commuting.[24][25] Throughout its run, the NRG Power series sustained bestseller status in Europe, notably ranking among Italy's top 50cc scooters with 2,265 annual units in 2010, until discontinuation in 2020.[26]Technical specifications
General dimensions and performance
The Piaggio NRG line features compact dimensions optimized for urban mobility, with an overall length of 1,800 mm and width of 730 mm. The wheelbase measures 1,275 mm, providing a balance of stability and agility.[14] Dry weight across the NRG models ranges from 95 to 99 kg (weights listed as dry unless noted as kerb), contributing to responsive handling and ease of use. Fuel tank capacity varies between 6.5 and 6.7 liters, supporting typical daily commutes.[3][15] As 50 cc mopeds, NRG scooters are speed-limited to a top speed of 45 km/h. These capabilities are influenced by the engine's modest power output.[2] The NRG employs 13-inch wheels with tubeless tires for improved safety and convenience, with sizes varying by variant such as 120/70-13 or 130/60-13 front and 130/60-13 or 140/60-13 rear.[14][2][15]Variant-specific details
The early mc¹ and mc² variants delivered a power output of 3 kW from their two-stroke engines, with a kerb weight of approximately 91 kg, a rear drum brake, and a fuel tank capacity of 4.7–5.5 L.[27][28][29] These specifications emphasized lightweight agility for urban commuting, though the smaller tank limited range compared to later iterations. The mc³ series, encompassing DD, DT, and PureJet models, delivered 3 kW, with dry weights of 89–94 kg and fuel tank capacities around 6.5–7 L.[30][3] Rear braking varied by sub-variant, featuring a drum on DT models and an optional 175 mm disc on DD versions, while the PureJet introduced direct fuel injection for improved emissions control over carbureted setups.[15] In the NRG Power series (DD, DT, and PureJet), power ranged from 3–4 kW, dry weights reached 95–99 kg, and the DD models standardized dual disc brakes (240 mm front, 175 mm rear).[14][31] The enlarged 6.7 L fuel tank supported ranges over 200 km, aided by efficiencies of 35–40 km/L.[14][32] Across variants, torque progressed from approximately 4 Nm in early models to 4.7 Nm in the Power series, while fuel efficiency improved from 30 km/L to 35–40 km/L, reflecting refinements in engine tuning and injection technology.[3][14][33] Seat height remained consistent at around 795–810 mm, ensuring accessibility for a broad range of riders.[3][14]| Variant Series | Power (kW) | Dry Weight (kg) | Rear Brake | Fuel Tank (L) | Torque (Nm) | Fuel Efficiency (km/L) | Seat Height (mm) |
|---|---|---|---|---|---|---|---|
| mc¹/mc² | 3 | ~86 (kerb 91) | Drum | 4.7–5.5 | ~4 | 30–35 | 795 |
| mc³ (DD/DT/PureJet) | 3 | 89–94 | Drum/Disc | 6.5–7 | ~4 | ~35 | 795 |
| NRG Power (DD/DT/PureJet) | 3–4 | 95–99 | Disc (DD) | 6.7 | 4.7 | 35–40 | 810 |