Segment:
Lightweight sport motorcycle segment, popular among younger riders and for urban commuting/track day use.
Key Competitors:
Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125 (though RS50 predates some of these directly, it occupied the same market space).
Design Philosophy:
Emphasizes sporty styling, agile handling, and performance characteristics derived from Aprilia's larger sportbikes.
Engine Type:
Liquid-cooled, two-stroke single-cylinder engine, delivering brisk acceleration for its class.
Primary Coverage:
Comprehensive service, repair, and maintenance for the Aprilia RS50 (2004 model year).
Secondary Coverage:
Includes troubleshooting, diagnostics, electrical systems, and specifications.
Estimated Pages:
Approximately 300-400 pages (typical for a comprehensive workshop manual).
Type:
Workshop Service Repair Manual
Language:
English (standard for most international service manuals).
Format:
Digital (PDF) likely, with potential for printable versions.
Engine:
Top-end overhaul, bottom-end disassembly/assembly, cylinder, piston, crankshaft, connecting rod, cooling system (liquid-cooled).
Fuel System:
Carburetor (Dell'Orto PHVA or similar) tuning, cleaning, rebuilding; fuel pump; fuel tank; fuel lines.
Ignition System:
CDI unit, spark plug, ignition coil, wiring, timing adjustments.
Transmission:
6-speed gearbox inspection, repair, clutch operation, gear shift mechanism.
Cooling System:
Radiator, water pump, hoses, thermostat, coolant specifications and bleeding procedures.
Chassis Frame:
Frame inspection, swingarm, linkage systems.
Suspension:
Front fork (USD type) overhaul, rear shock absorber, settings, oil types and levels.
Brakes:
Front and rear disc brake systems, caliper overhaul, master cylinder, brake fluid specifications and bleeding.
Wheels Tires:
Wheel bearing replacement, tire fitting, wheel balancing, tire pressures.
Electrical System:
Wiring diagrams, lighting system, starter system, battery, fuses, relays, instrument panel, sensor testing.
Bodywork Trim:
Fairing removal and installation, seat, fuel tank cover, body panel alignment.
Scheduled Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug service, coolant checks.
Troubleshooting:
Diagnostic flowcharts for common starting, running, and electrical issues.
Disassembly Assembly:
Step-by-step instructions for major component overhauls and replacements.
Torque Specifications:
Detailed torque values for critical fasteners across all systems.
Special Tools:
Identification and usage of required special tools for specific procedures.
Depth Level:
Comprehensive; suitable for DIY mechanics and professional technicians alike.
Diagnostic Capabilities:
Detailed diagnostic trees and component testing procedures for electrical and mechanical issues.
Digital Format:
PDF (Portable Document Format), typically optimized for clear viewing and printing.
Image Resolution:
High-resolution images and diagrams for clarity.
Physical Binding:
N/A (for digital) - If a printed version were available, likely spiral-bound for lay-flat use.
Physical Paper:
N/A (for digital) - If printed, typically heavy-stock paper resistant to shop oil and grime.
Engine Type:
Two-stroke, single-cylinder, liquid-cooled, reed valve induction.
Bore X Stroke:
39.5 mm x 40.2 mm
Compression Ratio:
Approx. 8.3:1
Horsepower Rated:
Approx. 8.1 HP @ 9,250 rpm (Varies by market regulations, typically restricted for A5 license category).
Torque Rated:
Approx. 6.2 Nm @ 8,750 rpm (Varies by market).
Carburetor Model:
Dell'Orto PHVA 12 QD or similar.
Fuel Type:
Unleaded gasoline (minimum 95 RON recommended).
Oil System:
Premix or Autolube (separate oil injection system).
Cooling Type:
Liquid-cooled.
Crash Test Data:
N/A (motorcycles typically do not undergo formal crash testing like cars).
Braking System:
Dual disc front brake, single disc rear brake.
Suspension Damping:
Adjustable front fork preload (on some variants) and rear shock absorber damping.
Lighting:
Halogen headlight, LED taillight, turn signals.
Frame Construction:
Perimeter frame, typically aluminum or steel alloy for rigidity and light weight.
Instrument Cluster:
Analog tachometer, digital speedometer, odometer, trip meter, coolant temperature warning light.
N A:
N/A (basic model, no electronic rider aids like ABS or traction control).
N A:
N/A (no advanced connectivity features).
Oil Change Engine:
Every 3,000-5,000 km or annually (refer to manual; 2-stroke requires oil for fuel/oil mix or autolube).
Spark Plug Service:
Every 3,000-6,000 km (depending on plug type and condition).
Air Filter Cleaning:
Every 3,000-5,000 km (depending on operating conditions).
Chain Lubrication Adjustment:
Every 500-1,000 km or after riding in wet conditions.
Coolant Flush:
Every 2 years or as specified in manual.
Engine Oil Type Autolube:
API TC, JASO FD or FD certified 2-stroke synthetic oil.
Coolant Type:
Ethylene glycol-based antifreeze, 50% mixture with distilled water.
Common Problems:
Carburetor jetting sensitivity, exhaust port clogging due to carbon buildup in 2-stroke engines, clutch wear, electrical connectors corrosion.
Preventative Measures:
Regular cleaning of air filter and carburetor, proper 2-stroke oil usage, keeping electrical connections clean and protected.
Manufacturer:
Aprilia is an Italian manufacturer known for its sport-focused motorcycles, including racing success in various disciplines.
Rs50 Lineage:
The RS50 has been a staple in Aprilia's lineup, representing their entry-level sportbike offering, often updated with styling and mechanical revisions.
Production Period:
The RS50 has been in production in various iterations since the late 1990s, with the 2004 model year representing a specific evolutionary stage.
Manufacturing Location:
Typically manufactured in Italy by Aprilia.
