Segment:
Entry-level sport motorcycle, popular in European markets for learner riders.
Competitors:
Derbi Senda, Gilera GSM, Yamaha TZR50, Honda NSR50, Suzuki RG50.
Features:
Sharp, aggressive styling mimicking larger Aprilia sportbikes, capable 50cc 2-stroke engine, reliable performance for its class.
Coverage Type:
Comprehensive Service and Repair
Page Count:
Estimated 200-300 pages (typical for this model/era workshop manual)
Manual Type:
Workshop Manual / Service Manual
Language:
Likely English (standard for international sales, though multilingual versions may exist)
Engine:
Engine disassembly, assembly, component testing, lubrication, cooling system, fuel system (carburetor tuning), ignition system, exhaust system.
Transmission:
Gearbox disassembly/assembly, clutch operation, shifting mechanism, gearbox lubrication.
Chassis And Frame:
Frame inspection, steering head bearings, swingarm, rear shock absorber, suspension fork overhaul, wheel bearings, wheel assembly.
Brakes:
Hydraulic brake system (front and rear), caliper maintenance, master cylinder service, brake pad replacement, brake fluid bleeding, rotor inspection.
Electrical:
Wiring diagrams, lighting system, ignition switch, starter motor, battery maintenance, fuses, horn, indicators, instrument cluster troubleshooting.
Bodywork And Trim:
Fairing removal/installation, seat, fuel tank, fenders, decals, minor bodywork repairs.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug checks, chain adjustment, lubrication points.
Troubleshooting:
Diagnostic procedures for common problems, symptom-based fault finding, electrical system diagnostics.
Repair:
Step-by-step repair instructions for all major mechanical and electrical components.
Rebuilds:
Complete engine and gearbox rebuild procedures, including component tolerances and torque specifications.
Special Tools:
Likely lists specific Aprilia special tools required for certain procedures (e.g., flywheel puller, engine assembly tools).
Depth:
Advanced diagnostic and repair procedures suitable for experienced mechanics and dedicated DIY enthusiasts.
Diagnostic Tools:
Covers standard diagnostic procedures using basic tools and knowledge; may include specific test procedures for electrical components.
Engine Type:
Two-stroke, single-cylinder, liquid-cooled
Bore X Stroke:
39.5 mm x 40.0 mm
Compression Ratio:
Approx. 8.5:1
Horsepower:
Approx. 6-8 HP (depending on specific market regulations and tuning)
Top Speed:
Typically governed to comply with 50cc moped regulations (e.g., 45-50 km/h), but capable of higher speeds when derestricted (varies by region).
Carburetor:
Dell'Orto PHBG 17.5mm (common fitment)
Fuel Type:
Unleaded gasoline (95 RON or higher recommended), 2-stroke oil mixture (e.g., 1:50 ratio).
Oil System:
Separate oil injection system for 2-stroke oil.
Cooling Method:
Liquid-cooled
Ignition Type:
Electronic CDI (Capacitor Discharge Ignition)
Wheelbase:
Approx. 1330 mm
Dry Weight:
Approx. 90-95 kg
Fuel Tank Capacity:
Approx. 7.0 Liters
Front Tire:
100/80-17 (or similar)
Rear Tire:
130/70-17 (or similar)
Frame Type:
Aluminum alloy perimeter frame
Front Suspension:
Upside-down telescopic forks (Marzocchi or similar)
Rear Suspension:
Monoshock with adjustable preload
Front Brake Type:
Hydraulic disc, single caliper
Rear Brake Type:
Hydraulic disc, single caliper
Crash Safety:
Not applicable for this vehicle class (no standardized crash ratings for 50cc mopeds).
Braking System:
Hydraulic disc brakes front and rear.
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel perimeter frame for rigidity.
Oil Change:
Every 3,000-5,000 km or annually (engine oil; 2-stroke oil tank needs regular refilling).
Spark Plug Check:
Every 2,000-3,000 km.
Chain Lubrication:
Every 500 km or after riding in wet conditions.
Brake Fluid Flush:
Every 2 years.
Engine Oil:
High-quality 2-stroke synthetic or semi-synthetic oil, meeting JASO FD or API TC standards.
Coolant:
Ethylene glycol-based antifreeze mixture, suitable for liquid-cooled engines (e.g., 50% coolant, 50% distilled water).
Brake Fluid:
DOT 4 (or as specified by Aprilia).
Common Problems:
Carburetor jetting sensitivity to altitude/temperature, wear on the clutch plates with heavy use, occasional electrical connector issues, radiator leaks.
Performance Tips:
Proper carburetor tuning is critical for optimal performance and fuel economy; regular chain maintenance is essential for drivetrain longevity.
Brand Focus:
Aprilia is renowned for its racing pedigree, particularly in smaller displacement classes.
Development:
The RS50 has been a consistent model in Aprilia's lineup, evolving in styling and components to meet changing regulations and rider demands.
Engine Platform:
Utilizes the robust and widely supported Minarelli AM6 engine, also used by other manufacturers.
Manufacturing Origin:
Italy
Production Years:
Ongoing since the mid-1990s through various iterations.
