🏷️ Basic Information Identification Make: Aprilia Model: RS 125 / Tuono 125 (Type 122 Engine) Engine Type: Rotax 122 Engine Family: Rotax 122 Series Generation Covered Generations: This manual covers models equipped with the Rotax 122 engine throughout its production lifecycle. Codes Engine Code: Rotax 122 👋 Introduction Market Position Target Audience: Owners and independent repair shops of Aprilia RS 125 and Tuono 125 models equipped with the Rotax 122 engine. Value Proposition: Empowers users to perform their own repairs and maintenance, saving money and extending vehicle life. Offers comprehensive technical information for all skill levels. Competitive Analysis Comparison: Provides factory-level repair information, often more detailed and accessible than generic motorcycle repair manuals. Key Features Ease Of Use: Very easy to follow, step-by-step instructions. Accessibility: Instant download, no shipping or waiting. Visuals: Abundant pictures and diagrams for clarity. 📋 Manual Details Coverage Areas Primary Coverage: Engine repair and maintenance Secondary Coverage: Troubleshooting, component identification, basic diagnostics Page Count Estimated Pages: Varies (Typical for comprehensive engine manuals of this type range from 200-400 pages) Manual Type Type: Workshop Repair Manual Language Language: English Format Format: PDF Distribution: Instant Download 📖 Manual Coverage Systems Covered Engine Internal: Top end (cylinder, piston, rings, cylinder head), bottom end (crankshaft, connecting rod, bearings), lubrication system, cooling system (if integrated), fuel delivery system (carburetor or injection components). Ignition System: Spark plug, ignition coil, CDI unit, stator, rotor (as pertains to engine timing and operation). Exhaust System: Exhaust pipe and silencer removal/installation and maintenance. Procedures Included Routine Maintenance: Spark plug inspection/replacement, air filter cleaning/replacement, carburetor adjustment/cleaning, oil level checks and changes (for applicable models), coolant checks/changes. Disassembly Assembly: Complete engine teardown, cylinder head removal, piston and connecting rod removal/installation, crankshaft assembly, gearbox disassembly/assembly. Troubleshooting: Diagnosis of common running issues, misfires, power loss, starting problems, overheating. Rebuilding: Detailed instructions for engine rebuilds, including torque specifications, measurements, and component tolerances. Technical Depth Depth: Comprehensive. Covers everything from basic maintenance to full engine overhauls and component-level diagnostics. Designed for both experienced mechanics and DIY enthusiasts. 📊 Manual Specifications File Format Format: PDF Searchable: Likely searchable text within the PDF for efficient information retrieval. Print Quality Printability: All pages are printable, allowing users to print specific sections or the entire manual. Image Clarity: Tons of pictures and diagrams, implying high-quality illustrations for visual guidance. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Design: Single-cylinder, two-stroke, liquid-cooled Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Displacement: 124.8 cc Compression Ratio: Approx. 12.5:1 (varies by specific model variant) Performance Horsepower: Typically around 30-34 HP (at crankshaft, varies by model year and regulations) Torque: Approx. 22-24 Nm (at crankshaft, varies by specific model variant) Fuel System Fuel Delivery: Carburetor (e.g., Dell'Orto PHBH 28/30) or Electronic Fuel Injection (EFI) on later models. Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Engine Internal Cooling System: Liquid-cooled Lubrication: Premix or oil injection system (depending on model year) Valves: N/A (Two-stroke engine) 🔧 Transmission Standard Type: 6-speed constant mesh sequential gearbox Optional Optional Transmissions: N/A (Standard for this engine) Features Clutch: Wet multi-plate clutch Final Drive: Chain drive 📐 Dimensions Exterior Wheelbase: Approx. 1345-1370 mm (depending on model variant) Seat Height: Approx. 770-810 mm (depending on model variant) Weights Dry Weight: Approx. 127-140 kg (depending on model variant) Fuel Tank Capacity: Approx. 10-12 Liters (depending on model variant) 🛡️ Safety Features Ratings Crash Safety: N/A (Motorcycle specific safety is detailed in separate owner/service manuals. This manual focuses on the engine itself.) Active Features Braking System: Hydraulic disc brakes front and rear (details covered in chassis service manuals). Passive Features Engine Safety: Reliable operation and proper maintenance are key safety aspects covered by the manual. 💡 Technology Features Infotainment Infotainment System: N/A (Focus is on mechanical systems. Infotainment is typically a separate module for the motorcycle chassis.) Driver Assistance Engine Management: Carburetor with manual adjustments or electronic fuel injection (EFI) on later models, providing engine control. Connectivity Diagnostic Ports: May include diagnostic connectors for ECU (if EFI equipped) or basic electrical system checks. 🔧 Maintenance Service Intervals Spark Plug Inspection: Every 3,000 - 5,000 km (or as specified in vehicle owner's manual) Air Filter Cleaning: Every 3,000 - 6,000 km Carburetor Cleaning Adjustment: Every 6,000 - 10,000 km or as needed Top End Rebuild: Recommended every 15,000 - 25,000 km, depending on usage and maintenance Fluid Specifications Coolant: Ethylene glycol-based coolant, 50% mixture with distilled water (e.g., Motul Inugel Expert, Castrol Radicool) 2 Stroke Oil: High-quality synthetic 2-stroke oil suitable for high-performance liquid-cooled engines (e.g., Motul 710 2T, Castrol Power 1 TTS) Transmission Oil: API GL-4 or GL-5 SAE 75W/90 or 80W/90 gearbox oil (e.g., Motul Gear 300, Castrol EPX 80W-90) Known Issues Common Problems: Carburetor jetting sensitivity, wear on power...