Vehicle Segment:
Premium Maxi-Scooter
Competitors 2005 2006:
Yamaha TMAX 500, Suzuki Burgman 400/650, Honda Silver Wing 600, Aprilia Atlantic 250, Kymco Xciting 250.
Key Differentiators:
Steel monocoque chassis, liquid-cooled Quasar engine with electronic fuel injection, premium styling and build quality, comfortable ride.
Design Philosophy:
Blend of classic Vespa aesthetics with modern scooter technology and performance.
Manual Value Proposition:
Provides comprehensive, factory-authorized guidance for maintaining and repairing the specific USA market model, empowering owners and mechanics to perform tasks accurately and efficiently, thus saving on dealership service costs.
Engine Mechanical:
Complete disassembly, assembly, inspection, and repair of the Quasar 250 engine (cylinder, piston, crankshaft, valve train, etc.).
Fuel System:
Detailed procedures for the electronic fuel injection (I.e.) system, including fuel pump, injectors, throttle body, sensors, and ECU diagnostics.
Ignition System:
Spark plug replacement, ignition coil diagnosis, and related electrical components.
Cooling System:
Radiator, fan, coolant circulation, and thermostat operation and repair.
Transmission Drivetrain:
Automatic Continuously Variable Transmission (CVT) system, including variator, clutch, belt, and gearbox maintenance and repair.
Braking System:
Front and rear brake caliper service, disc replacement, brake fluid bleeding, and hydraulic system components.
Suspension System:
Front fork overhaul, rear shock absorber inspection and replacement, and steering system components.
Electrical System:
Wiring diagrams, battery maintenance, lighting system, starter motor, alternator, and fuse box diagnostics.
Bodywork Chassis:
Panel removal and installation, seat, lighting, fairings, and cosmetic component procedures.
Diagnostics Troubleshooting:
Comprehensive troubleshooting guides for common and uncommon issues, fault code interpretation for the I.e. system.
Routine Maintenance:
Oil changes, filter replacements (oil, air, fuel), spark plug replacement, brake pad inspection and replacement, tire pressure checks.
Major Repairs:
Engine rebuilds, transmission servicing, suspension component replacement, electrical system diagnostics and repair.
Component Overhaul:
Detailed step-by-step instructions for the overhaul of critical components like the engine, CVT, and braking system.
Diagnostic Routines:
Procedures for diagnosing fuel system, ignition, and electrical faults using visual inspection and potentially diagnostic tools (if applicable to the manual's scope).
Torque Specifications:
Crucial torque values for all fasteners during assembly and disassembly.
Troubleshooting Charts:
Flowchart-style guides to systematically identify and resolve problems.
Depth Level:
Comprehensive Factory Level Detail
Target Audience:
Suitable for both experienced professional mechanics and diligent do-it-yourself enthusiasts.
Diagnostic Capability:
Enables in-depth diagnostics of electronic fuel injection (I.e.) system and other complex components.
Engine Type:
Four-stroke, single-cylinder, liquid-cooled, SOHC
Bore X Stroke:
72 mm x 60 mm
Compression Ratio:
10.6 : 1
Horsepower Claimed:
22 hp (approx. 16.2 kW) @ 7500 rpm
Torque Claimed:
15.5 lb-ft (approx. 21 Nm) @ 6500 rpm
Fuel Delivery:
Electronic Fuel Injection (I.e.)
Fuel Type:
Unleaded gasoline (min. 95 RON / 91 AKI)
Throttle Body Size:
55 mm
Recommended Oil Viscosity:
SAE 5W-40 API SG or higher
Oil Capacity With Filter:
1.1 Liters (approx.)
Crash Test Ratings:
N/A (Motorcycle/scooter safety ratings are typically not standardized like passenger cars).
Braking System:
Front: Hydraulic disc brake (260mm diameter), Rear: Hydraulic disc brake (240mm diameter). Optional ABS was available on some models, but likely not standard for USA 2005-2006.
Lighting:
Halogen headlight, LED taillight and turn signals.
Chassis Construction:
Steel monocoque frame providing rigidity and structural integrity.
Ergonomics:
Designed for comfortable rider positioning and control.
Infotainment System:
Basic instrument cluster with speedometer, odometer, fuel gauge, and warning lights. No advanced infotainment system typical of modern cars.
Driver Assistance Features:
ABS was an optional feature on some later versions, but for the 2005-2006 USA models, it was likely not standard. No other advanced driver assistance systems.
Connectivity Options:
N/A
Diagnostic Interface:
The manual covers diagnostics for the electronic fuel injection system, which may require specific tools for deeper analysis, though common procedures are detailed.
Initial Service:
Typically around 600-1000 miles (1000-1600 km), detailed in the manual.
Regular Maintenance Interval:
Every 3,000-4,000 miles (5,000-6,000 km) or annually, whichever comes first. Specific intervals for oil, filter, CVT belt, and spark plug checks are outlined in the manual.
Cv Belt Replacement Interval:
Generally recommended around 6,000-10,000 miles (10,000-16,000 km), but the manual will provide precise guidance based on wear inspection.
Engine Oil Specification:
SAE 5W-40, API SG or higher (as specified by Piaggio)
Coolant Type:
Ethylene glycol based coolant with anti-corrosion additives (typically a 50/50 mix with distilled water).
Common Wear Items:
CVT belt, variator rollers, brake pads, tires, and suspension bushings are typical wear items for this model and mileage.
Potential Fuel System Issues:
Early I.e. systems can sometimes experience minor sensor issues or require occasional cleaning of the throttle body and injectors, which the manual will address.
Piaggio Heritage:
Piaggio is an Italian industrial group with a long history dating back to 1884, renowned for its innovative and iconic Vespa scooters since 1946.
Gts Lineage:
The GTS 250 was a significant step for Vespa, introducing the powerful Quasar engine and modern features to a larger-displacement platform, building on the success of the GT series.
Production Years For Model:
2005-2014 (with various engine updates and facelifts over time). This manual specifically covers the 2005-2006 USA variants.
Manufacturing Location:
Italy
