🏷️ Basic Information Identification Make: Aprilia Model: RS125 Year: 2012 Codes Engine Code Placeholder: Specific engine code not provided, likely 158MI4 Chassis Code Placeholder: Specific chassis code not provided 👋 Introduction Market Position Market Position: The Aprilia RS125 has historically been a popular entry-level sportbike, appealing to younger riders and those seeking a stylish and engaging performance machine in the lightweight segment. This manual supports owners and technicians in maintaining its performance and reliability. Competitive Analysis Competitors: Competes with other 125cc sportbikes from brands like Yamaha (YZF-R125), Honda (CBR125R), and KTM (RC125), offering a distinct Italian flair and often a higher-spec engine for its class. Key Features Key Features Of Vehicle: Aggressive sportbike styling, capable 125cc two-stroke engine (for earlier models, but 2012 is likely a 4-stroke Rotax 158MI4), lightweight chassis, performance-oriented suspension and brakes. Key Features Of Manual: Authoritative, detailed, and practical guide for all service and repair needs, crucial for proper maintenance and longevity. 📋 Manual Details Coverage Areas Coverage: Comprehensive service, repair, and maintenance for the Aprilia RS125 (2012 model year). Page Count Page Count Estimate: Estimated 300-500 pages (typical for a full workshop manual) Manual Type Manual Type: Workshop Manual / Service Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine Systems: Engine overhaul, fuel system, ignition system, lubrication system, cooling system, exhaust system, emissions control. Transmission Systems: Clutch operation, gearbox disassembly and reassembly, gearshift mechanism. Chassis Systems: Frame inspection and repair, suspension (front forks, rear shock absorber), steering system, wheels and tires. Brake Systems: Brake system diagnosis, hydraulic components (master cylinders, calipers, lines), pad and disc replacement, bleeding procedures. Electrical Systems: Wiring diagrams, battery, charging system, lighting, starter motor, ignition switch, instrument panel, ECU troubleshooting. Bodywork And Trim: Fairing removal and installation, body panel repair, seat, fuel tank, and other trim components. Procedures Included Maintenance Procedures: Routine checks, lubrication, filter changes, chain adjustment, spark plug replacement, coolant level checks. Repair Procedures: Engine rebuild, carburetor tuning, suspension overhaul, brake caliper rebuild, electrical component replacement. Troubleshooting Guides: Diagnostic flowcharts for common issues, symptom-based problem solving. Technical Data And Specs: Torque specifications, fluid capacities, electrical resistance values, valve clearances. Technical Depth Depth: Expert level, covering detailed disassembly, assembly, diagnosis, and repair procedures for mechanics and advanced enthusiasts. 📊 Manual Specifications File Format File Format: PDF Searchability: Likely text-searchable PDF for quick information retrieval. Print Quality Print Quality: High-resolution, suitable for clear printing of diagrams and text. Binding Type Binding Type: N/A (Digital format) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, single-cylinder, liquid-cooled Engine Code: Likely Rotax 158MI4 (specific code may vary slightly) Displacement: 124.2 cc (7.58 cubic inches) Bore X Stroke: 54 mm x 54.5 mm (typical for this engine) Compression Ratio: 11.8:1 (typical) Valve Actuation: DOHC, 4 valves per cylinder Performance Horsepower: Approx. 15 hp (regulatory limit for A1 license category) Torque: Approx. 11 Nm (typical) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) - Dell'Orto or similar, likely with a single throttle body. Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Ignition System Ignition Type: Digital electronic ignition Lubrication System Oil Type: Semi-synthetic or fully synthetic 10W-40 motorcycle oil conforming to API SG or higher, and JASO MA. Cooling System Coolant Type: Ethylene glycol-based coolant with corrosion inhibitors (50% mix with distilled water recommended). Coolant Capacity: Approx. 1.0 liters (check manual for exact capacity) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Clutch Type: Wet multi-plate clutch Features Final Drive: Chain drive (520 pitch chain) Gear Ratios: Specific gear ratios detailed in the manual, crucial for performance tuning. Transmission Fluid Transmission Oil Type: SAE 80W-90 API GL-4 gear oil (check manual for exact specification and capacity). 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 720 mm Height: Approx. 1135 mm Wheelbase: Approx. 1360 mm Weights Dry Weight: Approx. 115 kg Curb Weight: Approx. 130 kg (with all fluids) Max Load: Approx. 150 kg (rider and luggage) Fuel Tank Capacity: Approx. 12 liters Wheels And Tires Front Tire Size: 110/70-17 Rear Tire Size: 150/60-17 Front Wheel Type: Alloy Rear Wheel Type: Alloy Wheel Bolt Pattern: N/A (typically single-sided or hub-mounted design for rear) 🛡️ Safety Features Ratings Safety Ratings: Motorcycle safety standards applicable in region of sale, not typically rated by agencies like NHTSA. Active Features Braking System: Front: Hydraulic disc brake (e.g., 320mm disc, 4-piston caliper); Rear: Hydraulic disc brake (e.g., 220mm disc, 2-piston caliper). ABS was not standard on most RS125 models, especially for this year. Lighting System: Halogen headlights, LED taillight, integrated turn signals. Passive Features Frame Construction: Aluminum twin-spar frame for rigidity and light weight. Ergonomics: Sportbike riding position, designed for performance and rider engagement. 💡 Technology Features Infotainment Infotainment System: Basic digital dashboard with speedometer, tachometer, odometer, trip meter, fuel gauge, and indicator...