Segment:
Premium 125cc scooter market, appealing to urban commuters and younger riders.
Competitors:
Honda Pantheon 125, Piaggio Liberty 125, Gilera Runner 125, Yamaha Majesty 125.
Design:
Sporty Italian styling, comfortable seating, practical under-seat storage.
Performance:
Agile handling, suitable for city traffic and light touring, reliable performance for its class.
Model Years Covered:
1997, 1998, 1999, 2000, 2001, 2002, 2003
Engine Variants Covered:
125cc (LE257M, LE257S, LE257V)
Type:
Service and Repair Manual
Engine:
Complete engine disassembly, assembly, tuning, and component diagnostics (carburetor, ignition, cooling, lubrication).
Transmission:
Automatic CVT (Continuously Variable Transmission) service, belt replacement, roller inspection, clutch operation.
Brakes:
Front and rear brake system service (disc and drum), hydraulic components, pad/shoe replacement, bleeding procedures.
Electrical:
Wiring diagrams, lighting system, starting system, charging system (stator, regulator/rectifier), battery maintenance, fuses, switches.
Chassis Suspension:
Front fork (telescopic hydraulic) overhaul, rear shock absorber replacement, swingarm and bearing service.
Fuel System:
Fuel tank service, fuel line maintenance, carburetor cleaning and adjustment (Dell'Orto PHVA/PHVB series).
Cooling System:
Liquid-cooled system, radiator, fan, coolant type and capacity, hose replacement.
Bodywork Trim:
Fairing removal and installation, seat, storage compartments, paneling.
Maintenance:
Routine checks, oil changes, filter replacements, spark plug service, coolant flushes, brake fluid replacement.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting for engine, electrical, and mechanical issues.
Repair:
Step-by-step instructions for component repair and replacement, including engine rebuilds, suspension work, and electrical diagnostics.
Adjustment:
Carburetor tuning, idle speed adjustment, brake lever free play, chain tension (if applicable, though mostly belt drive).
Assembly Disassembly:
Detailed instructions for complete disassembly and reassembly of major vehicle components.
Depth:
Comprehensive (covers routine maintenance through complete engine rebuilds and detailed electrical diagnostics).
Engine Type:
Four-stroke, single-cylinder, liquid-cooled
Bore X Stroke:
57 mm x 48.6 mm
Compression Ratio:
10.2:1
Horsepower:
Approx. 14.7 HP @ 9000 rpm (variant dependent)
Torque:
Approx. 11.5 Nm @ 7500 rpm (variant dependent)
Carburetor:
Dell'Orto PHVA 26/PHVB 26 (specific model varies)
Valve Train:
SOHC, 4-valve
Crash Test Ratings:
N/A (Scooter segment not typically subjected to automotive-style crash testing)
Braking System:
Front: Disc brake, Rear: Drum brake (some later models may have optional rear disc)
Lighting:
Halogen headlight, LED tail light, turn signals.
Frame:
Steel underbone frame for structural integrity.
Tires:
Tubeless tires for reduced risk of sudden deflation.
Oil Change Interval:
Every 3,000-5,000 km or annually, whichever comes first (refer to manual for exact spec).
Spark Plug Replacement:
Every 6,000-10,000 km (refer to manual for specific plug type and gap).
Air Filter Cleaning:
Every 2,000-4,000 km (clean or replace as needed).
Coolant Replacement:
Every 2 years or as per manual recommendations.
Engine Oil Type:
API SG/SH or JASO MA, SAE 10W-40 (verify with manual for precise grade).
Engine Oil Capacity:
Approx. 1.0 Liters (without filter change), 1.1 Liters (with filter change) - verify with manual.
Coolant Type:
Ethylene glycol-based antifreeze mixture (50/50 with distilled water).
Common Problems:
Carburetor gumming if not run regularly, potential aging of cooling system hoses, wear on CVT belt and rollers over time, electrical connector corrosion.
Preventative Measures:
Regular use, proper storage, periodic carburetor cleaning, checking and replacing wear items on schedule.
Manufacturer:
Aprilia is an Italian manufacturer known for its performance motorcycles and scooters.
Introduction Year:
The Leonardo line was introduced in the mid-1990s, with the 125cc model being a core offering.
Updates:
Minor updates likely occurred across the model years regarding graphics, minor component revisions, and possibly emissions compliance.
Manufacturing Location:
Italy
Production Period:
1997 - 2003 (for the 125cc variant covered by this manual).
