🏷️ Basic Information Identification Make: Aprilia Model: RS125 Model Nickname: Rotax 122 Vehicle Type: Motorcycle Generation Covered Years: 1993-2002 Codes Engine Code Primary: Rotax 122 E V 👋 Introduction Market Position Target User: Enthusiast owners, independent repair shops, and DIY mechanics seeking professional-grade repair information. Competitive Analysis Value Proposition: Provides access to the same detailed information used by authorized Aprilia service centers, enabling cost savings on maintenance and repairs. Key Features Instruction Style: Easy-to-follow, step-by-step instructions designed for varying skill levels. Accessibility: Instant download eliminates shipping costs and waiting times, offering immediate access to repair information. 📋 Manual Details Coverage Areas Primary Coverage: Complete Service and Repair Page Count Total Pages: 291 Manual Type Type: Workshop Service Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine Management: Detailed coverage of ignition, fuel injection (if applicable to specific sub-models within year range), and exhaust systems. Lubrication System: Oil pump operation, oil filter replacement, lubrication points, and oil type recommendations. Cooling System: Radiator, coolant circulation, thermostat operation, fan system (if equipped), and coolant specifications. Fuel System: Carburetor disassembly, cleaning, adjustment (Dell'Orto PHBH/PHVA variants likely), fuel tank, fuel lines, and fuel pump (if applicable). Chassis And Suspension: Frame components, front fork (Telescopic, Marzocchi/Paioli likely) overhaul and adjustment, rear shock absorber (Monoshock, White Power/Sachs likely) servicing, swingarm maintenance, and wheel bearings. Braking System: Front and rear brake caliper servicing, master cylinder overhaul, brake fluid specifications, pad replacement, rotor inspection, and bleeding procedures. Electrical System: Wiring diagrams, battery maintenance, charging system (stator, regulator/rectifier), lighting system, ignition coil, starter motor, and fuses. Procedures Included Routine Maintenance: Scheduled maintenance tasks such as oil changes, filter replacements, chain adjustment and lubrication, spark plug checks, and brake fluid level checks. Engine Rebuild: Comprehensive step-by-step instructions for engine disassembly, inspection of internal components (piston, rings, cylinder, crankshaft, connecting rod), reassembly, and tuning. Troubleshooting: Diagnostic procedures for common running issues, electrical faults, and mechanical problems with guided solutions. Component Overhaul: Detailed instructions for overhauling major components like the carburetor, suspension forks, shock absorber, and brake system. Technical Depth Diagnostic Capabilities: Advanced diagnostic information beyond basic checks, including component testing procedures and specifications. Rebuild Instructions: Full engine and component rebuild procedures suitable for in-depth mechanical work. Diagrams And Illustrations: Abundant diagrams, exploded views, and clear illustrations to guide repairs and component identification. 📊 Manual Specifications File Format Digital Format Details: Searchable PDF format for easy navigation and keyword searching. Compatible with Windows and Macintosh operating systems. Print Quality Printability: All 291 pages are fully printable, allowing users to create physical copies of specific sections for use in the workshop. Binding Type Binding Format: N/A (Digital Download - PDF) Paper Type Paper Type Recommendation: N/A (Digital Download - PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 125 cc Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Cooling Method: Liquid-cooled Ignition System: Electronic ignition (CDI) Performance Horsepower Output: Approx. 30-32 HP (depending on variant and restrictions) Torque Output: Varies, but typically around 20-22 Nm Fuel System Carburetor Model: Likely Dell'Orto PHBH 28 or PHVA 28 (specifications for jetting and adjustment will be detailed in manual). Fuel Type: Unleaded gasoline (95 RON or higher recommended) Oil Mixing: Premix or automatic oil injection system (details within manual). 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Optional Clutch Type: Wet multi-plate clutch Features Gear Ratios: Specific gear ratios for each of the 6 speeds will be detailed in the manual for performance tuning and diagnostics. Final Drive: Chain drive 📐 Dimensions Exterior Wheelbase: Approx. 1370 mm (varies slightly by year/model variant) Seat Height: Approx. 810 mm (varies) Weights Dry Weight: Approx. 130-140 kg (varies by variant) 🛡️ Safety Features Ratings Safety Features: The manual details safety-critical systems like braking and lighting, crucial for safe operation. No formal crash ratings apply to this type of vehicle. Active Features Braking System Type: Hydraulic disc brakes front and rear. Passive Features Chassis Design: Frame construction and suspension geometry contribute to rider stability and control. 💡 Technology Features Infotainment Instrument Cluster: Details on instrument cluster functionality (speedometer, tachometer, warning lights) and troubleshooting will be included. Driver Assistance N A: N/A for this era of sportbike; focus is on mechanical and electrical systems. 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific mileage or time-based intervals for engine oil (if applicable) and gearbox oil. Spark Plug Replacement: Intervals for spark plug inspection and replacement will be provided, crucial for two-stroke engine performance. Chain Maintenance: Regular chain lubrication and adjustment intervals are critical for drivetrain longevity and will be detailed. Fluid Specifications Coolant Type: Ethylene glycol-based coolant with corrosion inhibitors (specific type and mix ratio provided). Brake Fluid Type: DOT 4 or DOT 5.1 (manual will specify exact requirement). Gearbox Oil Type: Specific gear oil viscosity and API...
Frame components, front fork (Telescopic, Marzocchi/Paioli likely) overhaul and adjustment, rear shock absorber (Monoshock, White Power/Sachs likely) servicing, swingarm maintenance, and wheel bearings.
Braking System:
Front and rear brake caliper servicing, master cylinder overhaul, brake fluid specifications, pad replacement, rotor inspection, and bleeding procedures.
Electrical System:
Wiring diagrams, battery maintenance, charging system (stator, regulator/rectifier), lighting system, ignition coil, starter motor, and fuses.
Procedures Included
Routine Maintenance:
Scheduled maintenance tasks such as oil changes, filter replacements, chain adjustment and lubrication, spark plug checks, and brake fluid level checks.
Engine Rebuild:
Comprehensive step-by-step instructions for engine disassembly, inspection of internal components (piston, rings, cylinder, crankshaft, connecting rod), reassembly, and tuning.
Troubleshooting:
Diagnostic procedures for common running issues, electrical faults, and mechanical problems with guided solutions.
Component Overhaul:
Detailed instructions for overhauling major components like the carburetor, suspension forks, shock absorber, and brake system.
Technical Depth
Diagnostic Capabilities:
Advanced diagnostic information beyond basic checks, including component testing procedures and specifications.
Rebuild Instructions:
Full engine and component rebuild procedures suitable for in-depth mechanical work.
Diagrams And Illustrations:
Abundant diagrams, exploded views, and clear illustrations to guide repairs and component identification.
📊 Manual Specifications
File Format
Digital Format Details:
Searchable PDF format for easy navigation and keyword searching. Compatible with Windows and Macintosh operating systems.
Print Quality
Printability:
All 291 pages are fully printable, allowing users to create physical copies of specific sections for use in the workshop.
Binding Type
Binding Format:
N/A (Digital Download - PDF)
Paper Type
Paper Type Recommendation:
N/A (Digital Download - PDF)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Two-stroke, single-cylinder
Displacement:
125 cc
Bore X Stroke:
54 mm x 54.5 mm (typical for Rotax 122)
Cooling Method:
Liquid-cooled
Ignition System:
Electronic ignition (CDI)
Performance
Horsepower Output:
Approx. 30-32 HP (depending on variant and restrictions)
Torque Output:
Varies, but typically around 20-22 Nm
Fuel System
Carburetor Model:
Likely Dell'Orto PHBH 28 or PHVA 28 (specifications for jetting and adjustment will be detailed in manual).
Fuel Type:
Unleaded gasoline (95 RON or higher recommended)
Oil Mixing:
Premix or automatic oil injection system (details within manual).
🔧 Transmission
Standard
Transmission Type:
6-speed constant mesh
Optional
Clutch Type:
Wet multi-plate clutch
Features
Gear Ratios:
Specific gear ratios for each of the 6 speeds will be detailed in the manual for performance tuning and diagnostics.
Final Drive:
Chain drive
📐 Dimensions
Exterior
Wheelbase:
Approx. 1370 mm (varies slightly by year/model variant)
Seat Height:
Approx. 810 mm (varies)
Weights
Dry Weight:
Approx. 130-140 kg (varies by variant)
🛡️ Safety Features
Ratings
Safety Features:
The manual details safety-critical systems like braking and lighting, crucial for safe operation. No formal crash ratings apply to this type of vehicle.
Active Features
Braking System Type:
Hydraulic disc brakes front and rear.
Passive Features
Chassis Design:
Frame construction and suspension geometry contribute to rider stability and control.
💡 Technology Features
Infotainment
Instrument Cluster:
Details on instrument cluster functionality (speedometer, tachometer, warning lights) and troubleshooting will be included.
Driver Assistance
N A:
N/A for this era of sportbike; focus is on mechanical and electrical systems.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Refer to manual for specific mileage or time-based intervals for engine oil (if applicable) and gearbox oil.
Spark Plug Replacement:
Intervals for spark plug inspection and replacement will be provided, crucial for two-stroke engine performance.
Chain Maintenance:
Regular chain lubrication and adjustment intervals are critical for drivetrain longevity and will be detailed.
Fluid Specifications
Coolant Type:
Ethylene glycol-based coolant with corrosion inhibitors (specific type and mix ratio provided).
Brake Fluid Type:
DOT 4 or DOT 5.1 (manual will specify exact requirement).
Gearbox Oil Type:
Specific gear oil viscosity and API rating will be listed (e.g., 75W/90, API GL-4).
Known Issues
Common Wear Items:
The manual will likely guide on inspection and replacement of wear items such as brake pads, clutch plates, piston rings, and chain/sprockets.
Two Stroke Specific Maintenance:
Focus on maintaining the power valve, exhaust packing, and preventing carbon buildup in the combustion chamber.
📚 Vehicle History
Brand Heritage
Aprilia Legacy:
Aprilia has a strong heritage in racing and performance motorcycles, with the RS125 being a significant model in their lightweight sports bike line-up.
Model Evolution
Rs125 Development:
The RS125 evolved from earlier Aprilia sport models, becoming a popular choice for aspiring racers and street riders due to its performance and handling characteristics. This manual covers a key generation of its development.
Production
Production Period:
The 1993-2002 period represents a significant era for the RS125, with various updates and engine configurations (especially regarding power restrictions for licensing).
🏆 Awards & Recognition
Recognitions
Model Reputation:
The Aprilia RS125 is widely regarded as a benchmark in the 125cc sportbike class for its performance and handling, often earning praise from enthusiasts and moto-journalists of its era.
Ratings
N A:
N/A (No formal awards typically apply to service manuals themselves, but the manual enables maintenance of an award-winning platform).