🏷️ Basic Information Identification Make: Aprilia Model: Type 122 125 Engine Code: Rotax 122 Codes Engine Series: Rotax 122 Series 👋 Introduction Market Position Target Audience: Owners, mechanics, and enthusiasts seeking to maintain and repair the Aprilia Type 122 125 engine. Competitive Analysis Manual Value Proposition: Provides essential, factory-level technical data and procedural guidance specifically for the Rotax 122 engine, which powered various Aprilia 125cc models, offering significant value over generic repair guides. Key Features Manual Highlights: Comprehensive coverage of the Rotax 122 engine, detailed troubleshooting, clear diagnostic procedures, and precise technical specifications. 📋 Manual Details Coverage Areas Primary Coverage: Aprilia Type 122 125 engine Page Count Total Pages: 137 Manual Type Type: Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Cooling system, Lubrication system, Fuel system, Ignition system, Exhaust system, Carburetor(s), Clutch, Transmission, Crankcase assembly, Cylinder and piston, Cylinder head, Crankshaft and connecting rod Electrical Systems: Ignition system (CDI, stator, coil, spark plug), starter motor circuit (if applicable to the vehicle), charging system (stator, regulator/rectifier). Procedures Included Maintenance Procedures: Scheduled maintenance, Oil changes, Filter replacements, Spark plug replacement, Coolant flush and fill, Chain adjustment, Carburetor synchronization and cleaning Repair Procedures: Engine disassembly and reassembly, Piston and cylinder replacement, Crankshaft and bearing service, Clutch overhaul, Transmission inspection and repair, Carburetor overhaul and jetting, Cylinder head gasket replacement, Valve adjustments (if applicable to specific variants) Troubleshooting Guides: Diagnostic charts for common problems, Symptom-based troubleshooting, Electrical system diagnostics (ignition and starting circuits related to engine operation) Carburetor Tuning: Detailed guidance on carburetor jet selection, needle position adjustment, idle speed, and mixture settings for various atmospheric conditions. Power Valve Service: If the engine is equipped with a power valve, the manual will cover its inspection, cleaning, adjustment, and troubleshooting. Technical Depth Depth: Comprehensive, covering everything from routine maintenance to complete engine rebuilds. Includes detailed diagrams, torque specifications, and clearances. Torque Specifications: Detailed torque values for all critical fasteners, including cylinder head bolts, main bearing caps, connecting rod bolts, and clutch components. Clearances And Tolerances: Specifications for piston-to-cylinder wall clearance, ring gap, bearing clearances, and transmission gear backlash. Manual Completeness Scope: Complete engine overhaul manual, providing all necessary information for professional engine repair and maintenance. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Searchable text within the PDF for quick access to specific topics and keywords. Print Quality Printability: Printable. High-resolution scans suitable for clear printing of all pages. Binding Type Binding Recommendation: Digital PDF format allows for on-demand printing and binding (e.g., spiral-bound, comb-bound) for workshop use. Paper Type Recommended Paper: Standard copier paper for printing. Consider heavier stock for frequently referenced pages. ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 124.8 cc (approx.) Bore X Stroke: Typically 54 mm x 54.5 mm (check specific model variant for exact figures) Cooling System: Liquid-cooled Ignition System: Electronic ignition (CDI) Combustion Chamber: Typically a reed valve induction system feeding into the crankcase. Performance Power Output: Varies by model and restriction, typically in the 15-32 hp range (check specific vehicle application) Torque Output: Varies by model and restriction, typically in the 10-18 Nm range (check specific vehicle application) Power Band: Characteristic of a two-stroke, typically delivering peak power in a higher RPM range. Fuel System Carburetor Type: Dell'Orto PHBH, PHBL, or similar (specific model varies) Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Fuel Oil Mixture: 1:50 (synthetic 2T oil) for pre-mix, or via automatic oil injection system 🔧 Transmission Standard Transmission Type: 6-speed constant mesh gearbox Optional Optional Transmission: N/A (typically manual only for this engine platform) Features Clutch Type: Wet, multi-plate clutch Final Drive: Chain drive 📐 Dimensions Exterior Engine Dimensions Lxwxh: Specific dimensions depend on the motorcycle model; manual focuses on internal engine component sizes. Weights Engine Dry Weight: Approximately 20-25 kg (engine assembly only, without fluids) 🛡️ Safety Features Ratings Crash Test Ratings: Not applicable to engine service manual. Vehicle safety ratings would be specific to the motorcycle model. Active Features Engine Safety Features: Reliable ignition and fuel delivery systems are critical for safe operation. Maintenance ensures optimal performance and reduces failure risks. Passive Features Engine Safety Design: Robust construction of engine components (crankcase, cylinder, piston) designed to withstand operating stresses. 💡 Technology Features Infotainment Infotainment Features: N/A (Engine service manual, no infotainment systems covered). Driver Assistance Engine Control Technology: Basic electronic ignition (CDI). Some later models might feature more advanced power valve control for broader power delivery. Connectivity Diagnostic Ports: Primarily mechanical diagnostics, with electrical diagnostics focusing on ignition and charging systems via basic multimeter tests. No advanced OBD-II or similar ports. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 km or annually, whichever comes first. Check manual for specifics. Spark Plug Replacement: Every 5,000-10,000 km, depending on plug type and usage. Refer to manual...