🏷️ Basic Information Identification Make: Aprilia Model: RS125 Model Code: RS 125 Generation Generation Identifier: 2002 Onward Codes Engine Code Designation: Rotax 122 👋 Introduction Market Position Positioning: The Aprilia RS125 is a highly regarded lightweight supersport motorcycle, known for its performance and track-inspired styling. This manual serves the owners and technicians responsible for maintaining this performance-oriented machine. Competitive Analysis Competitors Manuals: Competes with service manuals for similar 125cc two-stroke sportbikes of the era, such as Yamaha YZF-R125, Honda CBR125R (though the CBR is typically 4-stroke), and Cagiva Mito. Key Features Manual Value Proposition: Provides essential knowledge for keeping the potent Rotax 122 engine and sophisticated chassis of the RS125 in peak condition. The inclusion of a parts catalog and owner's manual enhances its utility. 📋 Manual Details Coverage Areas Primary Coverage: Repair and Service Secondary Coverage: Parts Catalog, Owner's Manual Page Count Estimated Page Count: Refer to specific product listing; typically 300-600 pages for comprehensive service manuals. Manual Type Type: Workshop Repair Service Manual Language Language: Likely English (based on typical product sourcing for North American/European markets) Format Format: Print (as implied by 'BIKE Repair Service Manual') 📖 Manual Coverage Systems Covered Engine: Full engine overhaul, top end (cylinder, piston, rings, head), bottom end (crankshaft, bearings, seals), cooling system (radiator, hoses, thermostat). Fuel System: Carburetor (Dell'Orto PHBH 28/PHVB 26) disassembly, cleaning, adjustment, jetting; fuel tank, fuel lines, fuel pump (if applicable). Lubrication System: 2-stroke oil injection system (pump, reservoir, lines), pre-mix procedures, oil specifications. Ignition System: CDI ignition, spark plug specifications, timing procedures, stator and rotor inspection, ignition coil testing. Exhaust System: Expansion chamber inspection and cleaning, silencer maintenance. Transmission: Gearbox disassembly and reassembly, clutch (cable, plates, springs), gear shift mechanism, lubrication. Chassis And Frame: Frame inspection, swingarm, bearings, steering head bearings. Suspension Front: Telescopic fork disassembly, oil change, seal replacement, spring inspection, damping adjustments. Suspension Rear: Monoshock absorber overhaul, spring preload adjustment, linkage maintenance. Brakes Front: Brake caliper service, master cylinder overhaul, brake pad replacement, rotor inspection, brake line bleeding. Brakes Rear: Brake caliper service, master cylinder overhaul, brake pad replacement, rotor inspection, brake line bleeding. Wheels And Tires: Wheel bearing replacement, tire mounting and balancing, wheel rim inspection. Electrical System: Wiring diagrams, battery maintenance, lighting system (headlight, tail light, indicators), starter motor, charging system (alternator/stator), fuse box, switches, instrumentation. Bodywork And Fairings: Fairing removal and installation, minor body repair, decal placement. Procedures Included Maintenance: Routine checks, lubrication points, filter replacement, fluid changes, chain adjustment, bolt torquing. Troubleshooting: Diagnostic charts for common issues (e.g., starting problems, poor performance, electrical faults). Repair: Step-by-step instructions for disassembly, component replacement, and reassembly of all major systems. Calibration And Adjustment: Carburetor settings, clutch lever free play, throttle cable adjustment, suspension adjustments. Specification Data: Torque values, clearances, fluid capacities, electrical specifications. Technical Depth Depth: Comprehensive; suitable for experienced home mechanics and professional technicians. Covers from basic maintenance to complete engine rebuilds and complex electrical diagnostics. 📊 Manual Specifications File Format File Format: N/A (Print Manual) Print Quality Print Quality: Professional, clear diagrams and text (typical for manufacturer-produced or high-quality aftermarket manuals). Binding Type Binding Type: Likely saddle-stitched or perfect bound for durability in workshop use. Paper Type Paper Type: Durable, often glossy or semi-gloss paper to resist grease and dirt in a workshop environment. ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, two-stroke, liquid-cooled Displacement: 124.8 cc (7.62 cu. in.) Bore X Stroke: 54 mm x 54.5 mm (approximate) Compression Ratio: Approx. 12.5:1 (varies with model/tuning) Power Output: Typically around 30-34 HP (approx. 22-25 kW) at 11,000-12,000 RPM (depending on market restrictions and model variant). Torque: Approx. 18-20 Nm (13-15 ft-lbs) at 10,000 RPM (depending on market restrictions and model variant). Valve Train: Reed valve intake, exhaust power valve (APTS - Aprilia Performance Power Valve System). Cooling System: Liquid-cooled Performance Top Speed: Exceeds 160 km/h (100 mph) in unrestricted form. Fuel System Carburetor Model: Dell'Orto PHBH 28 (earlier models) or PHVB 26 (later models), depending on market and regulations. Fuel Type: Unleaded gasoline, minimum 95 RON (octane rating). Fuel Tank Capacity: Approximately 12-13 Liters (3.2-3.4 US Gallons). 🔧 Transmission Standard Type: 6-speed constant mesh sequential gearbox. Features Clutch: Wet, multi-plate, cable-operated. Final Drive: Chain drive. 📐 Dimensions Exterior Length: Approx. 1940 mm (76.4 in.) Width: Approx. 720 mm (28.3 in.) Height: Approx. 1070 mm (42.1 in.) Wheelbase: Approx. 1345 mm (53.0 in.) Seat Height: Approx. 810 mm (31.9 in.) Weights Dry Weight: Approx. 120-130 kg (265-287 lbs) (depending on model year and equipment). Curb Weight: Approx. 138-145 kg (304-320 lbs). 🛡️ Safety Features Ratings Safety Standards: Complies with European and relevant national road safety standards for motorcycles of its class. Active Features Braking System: Dual piston front caliper (often Brembo) with 320mm disc; single piston rear caliper with 210mm disc. ABS was not a standard feature in this era. Passive Features Lighting: Halogen...