🏷️ Basic Information Identification Make: Aprilia Model: RS125 Codes Engine Codes: Rotax 122 (primarily) 👋 Introduction Market Position Segment: Lightweight Sportbike / Supersport Competitive Analysis Competitors: Yamaha YZF-R125, Honda CBR125R, Kawasaki Ninja 125 (depending on region). Key Features Distinctive Attributes: Aggressive styling mimicking larger Aprilia sportbikes, potent 2-stroke engine performance for its class, capable chassis and suspension. 📋 Manual Details Coverage Areas Years Covered: 2007, 2008, 2009, 2010, 2011, 2012 Page Count Estimated Page Count: Approximately 300-500 pages (typical for comprehensive workshop manuals) Manual Type Type: Complete Workshop Service Repair Manual Language Language: English (assumed from product description) Format Format: Downloadable (Digital PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, disassembly, assembly, component inspection (piston, rings, cylinder, crankshaft, connecting rod), sealing procedures, timing. Fuel System: Carburetor tuning and servicing (Dell'Orto PHBH/VHSB series), fuel tank, fuel lines, fuel pump (if applicable), oil injection system. Ignition System: Ignition timing, CDI unit, spark plugs, coil, wiring. Cooling System: Radiator, cooling fan, water pump, thermostat, coolant specifications, bleeding procedures. Exhaust System: Exhaust pipe, silencer, power valve system operation and adjustment. Transmission: Gearbox disassembly and assembly, clutch operation (hydraulic actuation), gear selection mechanism, lubrication specifications. Chassis Frame: Frame inspection, steering head bearing service, swingarm pivot, rear shock absorber linkage. Suspension Front: Front fork service (oil change, seal replacement, spring inspection), damping adjustments. Suspension Rear: Monoshock rear suspension service, linkage bearing maintenance, pre-load adjustment. Brakes Front: Brake caliper overhaul, disc inspection, master cylinder servicing, brake fluid specifications, bleeding procedures. Brakes Rear: Rear brake caliper overhaul, disc inspection, master cylinder servicing, brake fluid specifications, bleeding procedures. Wheels Tires: Wheel bearing replacement, tire mounting, wheel balance, recommended tire pressures. Electrical System: Wiring diagrams, battery maintenance, charging system (stator, regulator/rectifier), lighting, starter motor, horn, fuses. Bodywork: Fairing removal and installation, seat, fuel tank cover, tail section. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment and lubrication, spark plug checks, air filter cleaning/replacement. Troubleshooting: Diagnostic charts for common problems, identifying causes and solutions for engine, electrical, and mechanical issues. Repair Procedures: Step-by-step instructions for all major component repairs and replacements. Rebuild Procedures: Detailed instructions for engine and gearbox rebuilds. Calibration Adjustment: Carburetor synchronization, power valve adjustment, clutch lever free play adjustment. Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to full engine and chassis rebuilds. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Print Quality Quality: High-resolution, designed for clear printing of diagrams and text. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, single-cylinder Displacement: 124.8 cc Bore X Stroke: 54 x 54.5 mm Cooling System: Liquid-cooled Compression Ratio: Approximately 12.5:1 (varies slightly by sub-model) Performance Horsepower: Typically around 30-33 HP at peak (for restricted models, often higher for unrestricted/race versions) Torque: Approximately 20-22 Nm Fuel System Carburetor: Dell'Orto PHBH 28 (or similar, depending on market regulations) Oil Injection: Yes, automatic 2-stroke oil injection system 🔧 Transmission Standard Type: 6-speed manual Features Clutch: Wet, multi-plate, hydraulically actuated Final Drive: Chain 📐 Dimensions Exterior Length: Approx. 1970 mm Width: Approx. 710 mm Height: Approx. 1135 mm Wheelbase: Approx. 1375 mm Weights Dry Weight: Approx. 131 kg Wet Weight: Approx. 144 kg (with fluids) 🛡️ Safety Features Active Features Braking System: Front: Disc brake (typically 320mm single disc with 4-piston caliper), Rear: Disc brake (typically 220mm single disc with 2-piston caliper). Passive Features Lighting: Halogen headlight, LED taillight. 💡 Technology Features Infotainment Dashboard: Digital/Analog combination instrument cluster with tachometer, speedometer, fuel gauge, coolant temperature indicator, and warning lights. Driver Assistance N/A: No electronic rider aids such as ABS or traction control on most standard models of this era. 🔧 Maintenance Service Intervals Oil Change: Every 3,000 - 5,000 km or annually, depending on usage. Spark Plug Check: Every 3,000 - 6,000 km Air Filter Cleaning: Every 3,000 - 5,000 km Chain Maintenance: Check tension and lubricate every 500 - 1000 km Fork Oil Change: Typically recommended every 10,000 - 15,000 km or as needed if performance degrades. Fluid Specifications Engine Oil: Fully synthetic 2-stroke oil, meeting JASO FD or higher standards. Coolant: Ethylene glycol-based coolant with corrosion inhibitors, 50/50 mix with distilled water. Brake Fluid: DOT 4 (or DOT 3 if specified for older versions, check manual for exact spec) Gearbox Oil: SAE 75W/90 synthetic gear oil (or equivalent specified in manual). Known Issues Power Valve Sticking: Common in 2-stroke engines due to carbon buildup; requires periodic cleaning. Carburetor Jetting: Can be sensitive to modifications or altitude changes; requires precise tuning. Cylinder Wear: High-performance 2-stroke engines can experience faster cylinder and piston wear if not maintained properly, especially if run hard or with incorrect oil. Clutch Slipping: Can occur with excessive wear or improper adjustment of the hydraulic system. 📚 Vehicle History Brand Heritage Manufacturer: Aprilia is an Italian motorcycle...