Scooter Segment:
Mid-size scooter, popular in urban commuting and light touring.
Key Competitors:
Honda Pantheon, Yamaha Majesty, Suzuki Burgman (relative to engine size and intended use).
Design Philosophy:
Blends sporty styling with practical scooter functionality, known for comfortable ergonomics and capable performance for its class.
Target Audience:
Commuters seeking a stylish and reliable mode of transport, riders looking for a step-up from smaller scooters.
General Coverage:
Comprehensive service and repair for the 2003 Aprilia Leonardo 125, 150, and 250 models.
Estimated Page Count:
400-600 pages (estimated based on typical service manual depth for this class of vehicle)
Manual Type:
Service and Repair Manual
Format:
Digital (likely PDF, printable)
Engine Overhaul:
Detailed procedures for engine disassembly, inspection, repair, and reassembly, including cylinder head, piston, crankshaft, and valve train.
Fuel System Maintenance:
Carburetor adjustment, cleaning, and overhaul; fuel pump operation and testing; fuel filter replacement.
Cooling System:
Radiator maintenance, coolant flush and replacement, thermostat testing, fan operation.
Electrical System:
Wiring diagrams, battery testing and replacement, charging system (alternator/stator, regulator/rectifier), ignition system (spark plug, ignition coil, CDI unit), lighting, and starting system.
Transmission And Drivetrain:
CVT (Continuously Variable Transmission) belt inspection and replacement, clutch operation, variator maintenance, final drive service.
Braking System:
Front and rear brake caliper service, brake pad replacement, hydraulic system bleeding, master cylinder inspection.
Suspension:
Front fork service (oil change, seal replacement), rear shock absorber inspection and replacement, linkage lubrication.
Steering:
Handlebar bearing inspection and adjustment, steering column service.
Bodywork And Chassis:
Fairing removal and installation, seat replacement, body panel repairs, chassis inspection.
Routine Maintenance:
Oil and filter changes, air filter cleaning/replacement, spark plug replacement, chain lubrication/adjustment (if applicable, though likely belt drive), general inspection checks.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Component Rebuild:
Detailed rebuild procedures for major engine components, carburetors, brake calipers, and suspension units.
Electrical Diagnostics:
Troubleshooting electrical faults using wiring diagrams, testing individual components.
Depth Of Information:
Extremely detailed, covering everything from basic maintenance checks to full engine and transmission rebuilds, including torque specifications, clearances, and diagnostic procedures.
Engine Type:
Four-stroke, liquid-cooled, single-cylinder
Engine 125:
Approx. 124cc displacement, power output typically around 14-15 HP.
Engine 150:
Approx. 150cc displacement, power output typically around 15-16 HP.
Engine 250:
Approx. 244cc displacement, power output typically around 21-22 HP.
Bore X Stroke:
Varies by model variant (e.g., 125: 57mm x 48.6mm, 250: 72mm x 60mm - to be confirmed in manual).
Compression Ratio:
Typically around 10.5:1 to 11.5:1 (to be confirmed in manual).
Fuel Delivery:
Carburetor (e.g., Keihin or Mikuni, specific model in manual).
Fuel Type:
Unleaded gasoline, 91-95 octane RON (Research Octane Number).
Fuel Tank Capacity:
Approximately 10-12 liters (to be confirmed in manual).
Length:
Approx. 2100-2200 mm (to be confirmed in manual).
Width:
Approx. 760-800 mm (to be confirmed in manual).
Height:
Approx. 1400-1450 mm (seat height to be confirmed in manual).
Dry Weight:
Approx. 150-170 kg (varies by engine size, to be confirmed in manual).
Gross Vehicle Weight Rating Gvwr:
To be confirmed in manual.
Underseat Storage:
Significant underseat storage, often capable of holding a full-face helmet.
Crash Test Information:
N/A (Vehicle safety ratings are typically not provided for scooters in the same manner as automobiles).
Front Brake:
Usually a hydraulic disc brake, possibly dual disc on 250 model.
Rear Brake:
Usually a hydraulic disc brake.
Lighting:
Halogen headlamp, LED taillight and turn signals (likely standard).
Mirrors:
Large, adjustable rearview mirrors for visibility.
Instrument Cluster:
Analog speedometer and tachometer, digital odometer, fuel gauge, and warning lights.
ABS:
ABS (Anti-lock Braking System) was an optional feature on some models, not standard across the range.
Connectivity Features:
N/A (No advanced connectivity features like Bluetooth or USB ports typical for this era).
Engine Oil Change:
Every 3,000 - 5,000 km or annually, whichever comes first (check manual for precise interval and specific oil type).
Air Filter Service:
Clean every 5,000 km, replace every 10,000 - 15,000 km (check manual).
Spark Plug Replacement:
Every 6,000 - 10,000 km (specific plug type and gap in manual).
Cvt Belt Inspection:
Inspect every 10,000 km, replace as needed based on wear (recommended replacement interval usually around 15,000-20,000 km).
Engine Oil Type:
API SG/SH/SJ or higher, JASO MA certified, SAE 10W-40 or 15W-50 recommended (confirm exact specification and viscosity in manual).
Engine Oil Capacity:
Approx. 1.0 - 1.3 liters with filter change (confirm exact capacity in manual).
Coolant Type:
Ethylene glycol-based, anti-corrosion coolant, typically a 50/50 mix with distilled water (confirm specific type in manual).
Brake Fluid Type:
DOT 4 recommended (confirm in manual).
Gearbox Oil Type:
Specific gear oil (e.g., SAE 80W-90 GL-4) for the final drive unit (confirm in manual).
Common Wear Items:
CVT belt, brake pads, tires, suspension seals, spark plug, air filter.
Potential Electrical Faults:
Regulator/rectifier failures or stator issues can occur, impacting charging system performance.
Carburetor Issues:
Carburetors can become clogged with debris or varnish if fuel is left to sit for extended periods, requiring cleaning and adjustment.
Aprilia Background:
Aprilia is an Italian manufacturer with a strong heritage in racing and performance motorcycles and scooters.
Leonardo Introduction:
The Leonardo line was Aprilia's entry into the premium maxi-scooter segment, designed for comfort and performance.
2003 Updates:
The 2003 model represents a refinement of the Leonardo platform, possibly with minor aesthetic or mechanical tweaks over earlier versions.
Manufacturing Location:
Primarily Italy, though some components may be sourced internationally.
