Segment:
Mid-size urban scooter, offering a balance of performance and practicality.
Target Audience:
Commuters, scooter enthusiasts, DIY mechanics looking for in-depth repair information.
Competitors:
Rivals included models like the Honda Pantheon 125, Suzuki Sixteen 125, Yamaha XMAX 125 (though XMAX came later), and Piaggio Skipper 125.
Design:
Sporty styling with a blend of Italian design flair, known for its agile handling and comfortable riding position.
Performance:
Adequate power for urban environments and light highway use, good fuel efficiency.
Engine:
Complete engine overhaul, diagnosis, timing, valve adjustment, piston/ring replacement, cylinder head service, carburetor overhaul and tuning.
Fuel System:
Fuel tank, fuel pump, fuel lines, carburetor (e.g., Dell'Orto PHBN 17.5, Keihin CVK, depending on specific model variant), fuel filter replacement.
Ignition System:
CDI unit, spark plug specifications and replacement, ignition coil testing, stator and rotor inspection.
Cooling System:
Air cooling system description, fan operation (if applicable), heat dissipation.
Transmission:
Automatic CVT (Continuously Variable Transmission) system, variator inspection and replacement, clutch operation and adjustment, drive belt inspection and replacement, torque converter.
Brakes:
Front and rear brake system diagnosis, hydraulic fluid specifications and bleeding procedures, brake pad replacement, caliper maintenance, disc inspection.
Suspension:
Front telescopic fork overhaul, oil change, seal replacement. Rear shock absorber inspection and replacement.
Electrical System:
Wiring diagrams, battery maintenance and testing, charging system (stator, rectifier/regulator), starter motor operation, lighting system troubleshooting, fuse box layout, horn, indicators.
Frame And Bodywork:
Chassis inspection, fairing removal and installation, seat removal, stand operation, body panel repair and alignment.
Wheels And Tires:
Tire pressure specifications, wheel bearing inspection and replacement, rim specifications.
Maintenance:
Oil and filter change intervals, air filter cleaning/replacement, spark plug replacement, brake fluid flush, drive belt check/replacement, gearbox oil change, lubrication points.
Troubleshooting:
Diagnostic flowcharts for common starting, running, and electrical issues. Symptom-based diagnosis guides.
Repair:
Step-by-step instructions for engine disassembly and reassembly, transmission servicing, suspension fork rebuild, brake caliper overhaul, electrical component replacement.
Specifications And Data:
Torque values for all fasteners, engine compression test procedures, carburetor jetting specifications, electrical resistance values, critical clearances.
Depth:
Comprehensive (covers basic maintenance to full engine and transmission rebuilds, including detailed electrical diagnostics).
File Type:
PDF (Portable Document Format)
Searchable:
Yes (typically, if generated from scanned or digital source)
Printable:
Yes (designed for printing individual sections or the entire manual)
Resolution:
High-resolution scans or original digital formatting for clear diagrams and text.
Binding:
N/A (Digital format; physical copies may vary, but typically wire-bound or perfect bound for service manuals)
Paper Quality:
N/A (Digital format; physical manuals often use durable, glossy paper for diagrams)
Completeness:
Complete factory service manual, covering all aspects of repair and maintenance.
Engine Type:
Four-stroke, single-cylinder, SOHC (Single Overhead Camshaft)
Bore X Stroke:
Approx. 52.4 mm x 57.8 mm (typical for this displacement)
Compression Ratio:
Approx. 10.0:1 to 11.0:1 (typical for this era's four-stroke 125s)
Cooling System:
Air-cooled
Horsepower:
Approx. 10-12 HP (subject to specific tuning and market regulations)
Torque:
Approx. 9-10 Nm (subject to specific tuning and market regulations)
Carburetor:
Typically a 17.5mm or 20mm Japanese carburetor (e.g., Dell'Orto PHBN 17.5 or Keihin CVK equivalent), possibly with automatic choke.
Fuel Type:
Unleaded gasoline, 95 RON recommended
Oil Type:
SAE 10W-40 API SG or higher (or specified by Aprilia for wet clutch compatibility)
Oil Capacity:
Approx. 0.8 - 1.0 Liters (including filter, check manual for exact)
Crash Test Results:
N/A (Motorcycle/scooter safety is not rated by standard automotive agencies)
Braking:
Front and rear disc brakes for effective stopping power.
Lighting:
Halogen headlight, tail light, brake light, and turn signals for visibility.
Frame Construction:
Steel frame designed for stability and rider feedback.
Mirrors:
Adjustable mirrors for rearward visibility.
Engine Oil Change:
Every 3,000-5,000 km or annually (refer to manual for exact interval).
Air Filter Cleaning:
Every 3,000-5,000 km; replacement at 10,000-15,000 km.
Spark Plug Replacement:
Every 6,000-10,000 km (depending on plug type).
Drive Belt Inspection:
Every 5,000-7,000 km, replacement typically between 15,000-20,000 km or when wear is evident.
Brake Fluid Flush:
Every 2 years or as per manual recommendation.
Gearbox Oil Change:
Every 5,000-7,000 km or annually.
Engine Oil Spec:
SAE 10W-40 API SG or higher (check manual for specific Aprilia approval).
Brake Fluid Spec:
DOT 4 hydraulic brake fluid.
Gearbox Oil Spec:
SAE 80W-90 gear oil.
Common Wear Items:
Drive belt wear, variator roller wear, carburetor jetting issues (if not maintained), rear shock absorber degradation over time.
Electrical Gremlins:
Older wiring harnesses can develop corrosion or loose connections, leading to intermittent electrical faults.
Manufacturer:
Aprilia is an Italian manufacturer with a strong heritage in performance motorcycles and scooters.
Origins:
Founded in 1945 in Noale, Italy.
Leonardo Lineup:
The Leonardo was Aprilia's flagship maxi-scooter line, with variants including 125cc, 150cc, and 250cc, all sharing similar chassis and styling.
Production Years:
The Leonardo 125 was produced primarily in the late 1990s and early 2000s, with the 2001 model being part of the facelifted 'ST' version.
Manufacturing Location:
Primarily Italy.
