🏷️ Basic Information Identification Make: Aprilia Model: Rotax 122 Engine Codes Engine Code: Rotax 122 👋 Introduction Market Position Target Audience: DIY mechanics, home repair enthusiasts, and professional technicians working on Aprilia motorcycles equipped with the Rotax 122 engine. Key Features Value Proposition: Enables users to perform their own repairs, saving money on labor costs and providing in-depth knowledge of the engine's systems. Ease Of Use: Features easy-to-follow, step-by-step instructions with accompanying pictures and diagrams. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Manual (WSM) Page Count Estimated Page Count: Varies based on specific model variant, but generally comprehensive. Language Language: English Format File Format: PDF Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader Compatibility Operating System Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine disassembly, assembly, inspection, and repair of all internal components (pistons, rings, connecting rods, crankshaft, cylinder, cylinder head, valves, camshafts, timing system). Fuel System: Carburetor (Dell'Orto PHBH, PHVA, etc.) overhaul, adjustment, jetting, and troubleshooting. Fuel pump, fuel lines, and fuel filter maintenance. Ignition System: CDI ignition system, spark plug specifications, troubleshooting of ignition faults. Cooling System: Liquid cooling system maintenance, coolant specifications, radiator, water pump, thermostat, and fan operation. Lubrication System: Oil pump operation, oil specifications, oil change intervals, lubrication points, and troubleshooting of oil-related issues. Exhaust System: Exhaust pipe and muffler inspection, maintenance, and removal/installation procedures. Electrical System: Wiring diagrams for engine control, lighting, starting, and charging systems. Alternator, starter motor, and battery testing and maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, chain adjustment, general inspection procedures. Troubleshooting: Diagnostic procedures for common engine problems, starting issues, performance complaints, and electrical faults. Rebuild Procedures: Step-by-step instructions for complete engine disassembly and reassembly, including torque specifications for critical fasteners. Component Testing: Detailed procedures for testing the functionality and performance of various engine components. Wiring Diagrams: Comprehensive wiring diagrams for all electrical circuits related to the engine. Technical Depth Depth Of Coverage: In-depth, professional quality, covering all areas of repair and maintenance. 📊 Manual Specifications File Format Print Quality: Full Printable Searchable Text: Likely searchable within Adobe Reader due to PDF format. Binding Type Binding Type: Digital (PDF Download) - No physical binding. Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: Typically 125cc (e.g., 124.8cc) Bore X Stroke: Commonly 54mm x 54.5mm Cooling Method: Liquid-cooled Combustion Chamber: Squish band design, often with an expansion chamber exhaust system for optimal performance. Performance Horsepower Range: Typically ranges from 25-35 HP depending on the specific Aprilia model and tuning. Torque Range: Approximately 17-25 Nm depending on model and tuning. Fuel System Carburetor Type: Dell'Orto PHBH or PHVA models are commonly specified, with various jetting configurations. Fuel Delivery: Premix or separate oil injection system (e.g., Rotax Automatic Lubrication System - ALS). Fuel Type: Unleaded gasoline, often requiring a higher octane rating (e.g., 95 RON or higher). 🔧 Transmission Standard Transmission Type: 6-speed constant mesh gearbox Features Clutch Type: Wet multi-plate clutch Gear Ratios: Specific gear ratios are detailed within the manual for each model variant. Transmission Fluid: Specific gearbox oil requirements are listed, typically a dedicated motorcycle gear oil. 📐 Dimensions Exterior Engine Dimensions: Varies by specific Aprilia motorcycle model, but generally compact for integration into performance chassis. 💡 Technology Features Infotainment Infotainment Features: N/A (Focus is on engine mechanics; vehicle-specific infotainment is not covered). Driver Assistance Driver Assistance Features: N/A (Focus is on engine mechanics; vehicle-specific driver assistance is not covered). Connectivity Connectivity Features: N/A (Focus is on engine mechanics; vehicle-specific connectivity is not covered). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 km or annually, as specified in the manual. Spark Plug Replacement: Recommended replacement intervals vary by spark plug type and usage, often around 6,000-10,000 km. Top End Rebuild Interval: For high-performance applications, top-end rebuilds (piston, rings) may be recommended every 10,000-15,000 km, depending on riding style and maintenance. Fluid Specifications Coolant Type: Ethylene glycol based antifreeze with corrosion inhibitors, typically a 50/50 mix with distilled water. Gearbox Oil Specification: Refer to manual for specific grade (e.g., SAE 80W-90 or SAE 75W-90 synthetic gear oil). 2-Stroke Oil Type: High-quality synthetic 2-stroke oil specifically designed for high-performance, liquid-cooled engines. Known Issues Common Wear Items: Piston rings, piston, cylinder wear, reed valves, clutch plates, and water pump seals are common wear items. Carburetor Tuning: Carburetor jetting can be sensitive to altitude, temperature, and exhaust/intake modifications, requiring periodic adjustment. Ignition System Reliability: While generally robust, CDI units or ignition coils can fail over time. 📚 Vehicle History Brand Heritage Manufacturer: Rotax (Bombardier Recreational Products), used by Aprilia. Model Evolution Engine Applications: Widely used in various Aprilia sport motorcycles, particularly in the 125cc class (e.g., Aprilia RS 125, Aprilia AF1 Futura).