🏷️ Basic Information Identification Make: Aprilia Model: RS125 Year: 1999 Engine Type: Rotax 122 Engine Configuration: Single-cylinder, 2-stroke Trim Levels: All Models/Engines/Trim/Transmissions Types Codes Vin Decoder Note: Specific VIN details not provided, but manual covers all variations for the 1999 model year. 👋 Introduction Market Position Positioning: High-performance 125cc sportbike, often a stepping stone to larger displacement motorcycles. Target Audience: Enthusiasts, DIY mechanics, owners seeking to maintain or repair their Aprilia RS125. Competitive Analysis Competitors 1999: Yamaha YZF-R125, Honda CBR125R (though CBR125R was later), Suzuki GSX-R125 (later), various other European 125cc sportbikes like Aprilia's own RS models from other years. Key Features Manual Value Proposition: Provides professional-level repair information, enabling significant cost savings on maintenance and repairs. Manual Advantage: Complete and intact, sourced from the same information used by local service shops. Digital Format Benefit: Convenient access, no physical wear and tear, ability to print specific sections. 📋 Manual Details Coverage Areas Primary Coverage: Service, Maintenance, Troubleshooting, Repair Geographic Coverage: Assumed global, based on Aprilia's market presence. Page Count Estimated Page Count: Hundreds of pages (as stated in description) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download Delivery Method: Instant Download Requirements: Adobe PDF Reader, WinZip Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine Top End: Detailed coverage of cylinder, piston, cylinder head, and valve train components. Clutch: Service, adjustment, and component replacement for the clutch assembly. Engine Lubrication: Details on the oil injection system and lubrication passages. Crankshaft Transmission: Information on crankshaft, connecting rod, gearbox, and internal transmission components. Wheels Tires: Wheel bearing service, tire pressure, and mounting procedures. Final Drive: Chain and sprocket maintenance and replacement. Brakes: Front and rear brake system service, including hydraulic components and pad replacement. Suspension: Front fork and rear shock absorber servicing, adjustments, and potential rebuilds. Steering: Handlebar, steering stem, and bearing maintenance and adjustment. Frame: Chassis integrity checks, component mounting points, and potential structural repairs. Electrical System: Comprehensive coverage including wiring diagrams, ignition system, lighting, and battery maintenance. Fuel System: Carburetor (likely Dell'Orto PHBH or similar), fuel lines, and fuel tank service. Cooling System: Radiator, coolant hoses, and thermostat operation. Procedures Included Maintenance: Routine servicing, fluid changes, filter replacements, chain adjustment, spark plug replacement. Troubleshooting: Diagnostic procedures for common and uncommon issues across all systems. Repair: Step-by-step instructions for component repair and replacement. Disassembly Assembly: Detailed procedures for taking apart and reassembling various vehicle components. Cleaning: Specific instructions for cleaning components during maintenance or repair. Installation: Procedures for installing new or reconditioned parts. Technical Depth Depth: Professional-level diagnostics and repair, equivalent to dealer service manuals. Detail Level: Detailed substeps, notes, cautions, warnings, numbered instructions, and enlarged insets for clarity. Diagnostic Tools: Implied coverage of necessary tools for repair and diagnostics. Wiring Diagrams: Included, crucial for electrical system troubleshooting. Specific Information: Critical specifications, illustrations, drawings, and photos. 📊 Manual Specifications File Format Format: PDF Searchability: Likely searchable text content within the PDF. Print Quality Printability: Full Printable Zoom Capability: YES (Zoom IN/OUT) Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: Rotax 122 (common engine for RS125) Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Compression Ratio: Approximately 12.0:1 (typical for Rotax 122) Cooling System Type: Liquid-cooled Engine Layout: Single-cylinder, 2-stroke, reed valve induction Performance Horsepower: Around 30-33 bhp (claimed, may vary by region/derestriction) Torque: Not specified in product info, but typically around 20-22 Nm Fuel System Carburetor Type: Dell'Orto PHBH 28 (common) Fuel Type: Unleaded gasoline (minimum 95 RON recommended) Oil Delivery: Automatic oil injection system 🔧 Transmission Standard Type: 6-speed sequential manual Optional Options: N/A (Standard gearbox) Features Clutch Type: Wet multi-plate clutch Final Drive Type: Chain drive 📐 Dimensions Exterior Wheelbase: Approx. 1375 mm (varies slightly by sub-model) Weights Dry Weight: Approx. 131 kg (varies by sub-model) 🛡️ Safety Features Ratings Crash Test Ratings: N/A (Motorcycle safety ratings are not typically comparable to cars and not provided in this manual description) Active Features Braking System: Dual piston front caliper with disc, single piston rear caliper with disc. Passive Features Chassis Design: Steel twin-spar frame for rigidity and handling. 💡 Technology Features Infotainment Infotainment System: N/A (Basic analog instrumentation cluster typical for this era of sportbike) Driver Assistance Assistance Features: N/A (No electronic rider aids like ABS or traction control on this model) 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific intervals based on usage (e.g., every few thousand kilometers). Spark Plug Replacement: Refer to manual, typically around 5,000-10,000 km. Chain Maintenance: Regular cleaning, lubrication, and tension adjustment. Fluid Specifications Engine Oil Type: 2-stroke synthetic or semi-synthetic premix oil, or specific oil for injection system. Coolant Type: Ethylene glycol-based antifreeze coolant (specific mixture ratio in manual). Brake Fluid...