🏷️ Basic Information Identification Make: Aprilia Model: RS 125 / Tuono 125 (Rotax 122 Engine) Codes Engine Code Family: Rotax 122 👋 Introduction Market Position Market Position: Targeted at owners and independent repair shops for the Aprilia 125 RS and Tuono models equipped with the Rotax 122 engine. Serves as an essential resource for maintaining and repairing these performance-oriented lightweight sportbikes. Competitive Analysis Competitive Analysis: The Rotax 122 engine was a prevalent and well-regarded powerplant in its class, known for its performance characteristics. This manual provides the same in-depth information as dealer-supplied technical documentation, offering a cost-effective alternative for specialized maintenance and repair. Key Features Key Features: Factory-accurate diagrams, step-by-step instructions, troubleshooting guidance, comprehensive coverage of all major vehicle systems, printable format for workshop use, instant digital download for immediate access. 📋 Manual Details Coverage Areas Coverage Areas: General Information, Periodic Maintenance, Engine, Fuel System, Throttle Body, Cooling System, Lubrication System, Chassis, Electrical System, Servicing Information, Emission Control Information, Wiring Diagrams Chassis Component Coverage: Includes maintenance and repair for steering head bearings, swingarm bearings, wheel bearings, front forks (seals, oil, springs), rear shock absorber, and brake caliper servicing. Page Count Page Count: Estimated 300-500 pages (typical for comprehensive factory service manuals) Manual Type Manual Type: Factory Service Repair Workshop Manual Target Audience: DIY owners, independent motorcycle repair shops, technical students. Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Systems Covered: Engine Mechanical, Fuel Injection/Carburetion (depending on specific year/model variant), Ignition System, Cooling System (Liquid Cooling), Lubrication System, Exhaust System, Transmission, Clutch, Suspension (Front & Rear), Brakes (Front & Rear Disc), Wheels & Tires, Frame & Bodywork, Electrical System (Lighting, Ignition, Charging, Instrumentation), Diagnostic Procedures, Emission Controls Electrical System Detail: Includes detailed wiring diagrams, component testing procedures for battery, alternator, stator, regulator/rectifier, ignition coil, starter motor, lights, horn, and instrumentation. Fuel System Detail: Covers carburetor cleaning, jetting adjustments, float bowl height, fuel pump operation (if applicable), and fuel line inspection. Procedures Included Procedures Included: Complete disassembly and reassembly of engine and components, routine maintenance tasks (oil changes, filter replacements, chain adjustment, spark plug service), troubleshooting guides, diagnostic procedures, wiring harness inspection and repair, suspension adjustments and rebuilds, brake system service, fuel system cleaning and adjustment, cooling system bleeding and maintenance, electrical component testing and replacement, body panel removal and installation Engine Rebuild Procedures: Comprehensive instructions for complete engine disassembly, cylinder head removal, piston and ring replacement, connecting rod inspection and replacement, crankshaft bearing service, and engine reassembly with precise torque settings and clearances. Technical Depth Technical Depth: Comprehensive factory-level detail, suitable for both novice DIY enthusiasts and experienced professional mechanics. Includes torque specifications, tolerances, specialized tool requirements, and step-by-step repair instructions with detailed illustrations. Diagnostic Procedures: Step-by-step troubleshooting for common running issues, ignition problems, fuel delivery faults, and electrical gremlins, often using multimeter readings and visual inspection guides. 📊 Manual Specifications File Format File Format: PDF Searchability: Likely searchable PDF content, allowing quick access to specific topics. Print Quality Print Quality: Printable without restriction, high-resolution diagrams and text. Binding Type Binding Type: Digital Download (PDF), User Printable Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, single-cylinder Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Displacement: 124.8 cc Compression Ratio: Approx. 11.5:1 to 12.5:1 (varies by specific model/tune) Power Output: Typically in the range of 30-34 HP (22-25 kW) depending on model and emissions regulations. Torque: Specific figures vary by model, but generally strong for its displacement class. Ignition System: Electronic ignition (CDI or similar), details on timing and component testing. Fuel System Fuel Delivery: Carburetor (e.g., Dell'Orto PHBH 28 or VHSH 30) or Fuel Injection (later models), often with reed valve induction. Recommended Fuel: Unleaded gasoline, minimum octane rating 95 RON (Premium/Super). Oil Mixing: Separate oil injection system for 2-stroke oil or manual premixing (depending on specific model variant). Cooling And Lubrication Cooling System Type: Liquid-cooled Coolant Type: Ethylene glycol-based antifreeze with corrosion inhibitors (e.g., Motul Motocool Expert or equivalent). Oil Type: High-quality 2-stroke synthetic or semi-synthetic engine oil specifically designed for liquid-cooled, performance 2-stroke engines (e.g., Motul 710 2T or equivalent). 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Features Clutch Type: Wet, multi-plate, cable-actuated Gear Ratios: Specific ratios detailed within the manual, varying by model year and intended use. Final Drive: Chain drive Chain Type: O-ring sealed chain (e.g., 520 pitch) 📐 Dimensions Exterior Wheelbase: Approx. 1360-1380 mm (varies by model) Weights Dry Weight: Approx. 125-135 kg (varies by model) Fuel Tank Capacity: Approx. 7.5 - 10 liters (varies by model) 🛡️ Safety Features Active Features Braking System Front: Hydraulic disc brake, typically single disc with 2 or 4-piston caliper Braking System Rear: Hydraulic disc brake, single disc with 1 or 2-piston caliper Tire Size Front: 110/70-17 (common) Tire Size Rear: 130/70-17 or 150/60-17 (common)...