🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Model Variant: Rotax 122 Generation Generation: First Generation (External Frame) Codes Chassis Code: e.g., AP06A (varies slightly by year/market) Engine Code: Rotax 122 (specific sub-variants may exist) 👋 Introduction Market Position Market Segment: Lightweight sportbike, entry-level performance motorcycle. Target Audience: Beginner to intermediate riders, track day enthusiasts, those seeking an accessible yet engaging sportbike experience. Competitive Analysis Key Competitors: Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125 (though the RS 125 predates some of these in its most potent forms). Key Features Design Philosophy: MotoGP-inspired styling, sharp handling, high-revving two-stroke engine performance. Aerodynamics: Full fairing for reduced drag and improved high-speed stability, distinctive twin-headlight design. 📋 Manual Details Coverage Areas Years Covered: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Page Count Estimated Page Count: 400-600 pages (typical for comprehensive factory service manuals of this era) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English (primary, though original manuals may exist in Italian, German, French, Spanish, etc.) Format Format: PDF (Download) 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top-end rebuild (cylinder, piston, cylinder head), bottom-end rebuild (crankshaft, connecting rod, bearings), cooling system (radiator, hoses, water pump), lubrication system (oil mixing/injection, gearbox oil). Fuel System: Carburetor (Dell'Orto PHBH, VHSB, etc.) disassembly, cleaning, adjustment, jetting; fuel lines, fuel tank maintenance, fuel filter. Ignition System: CDI ignition system, spark plug specifications, ignition timing, stator and coil testing. Transmission: Clutch operation and adjustment, gearbox disassembly and reassembly, gear inspection, shift linkage, final drive chain maintenance. Suspension: Front fork (Marzocchi, Paioli) disassembly, oil change, seal replacement, spring specifications; rear monoshock absorber (Progressive, Sachs) maintenance, adjustment, replacement. Brakes: Front and rear disc brake system overhaul, caliper inspection and rebuilding, master cylinder service, brake pad replacement, bleeding procedures, fluid specifications. Electrical System: Wiring diagrams, lighting system (headlight, taillight, indicators), charging system (alternator, battery), starter motor operation, fuse box layout, switchgear. Chassis And Bodywork: Frame inspection, steering head bearing service, fairing removal and installation, seat and tank mounting, exhaust system maintenance. Procedures Included Maintenance: Regular scheduled maintenance tasks, lubrication points, chain adjustment, fluid level checks, filter replacements, spark plug checks. Troubleshooting: Diagnostic flowcharts for common problems (e.g., starting issues, poor performance, electrical faults), symptom-based problem solving. Repair: Step-by-step instructions for component removal, disassembly, cleaning, inspection, repair, reassembly, and installation for all major systems. Specifications: Torque specifications for critical fasteners, clearances, tolerances, fluid capacities, and recommended settings. Technical Depth Depth: Comprehensive: Covers routine maintenance to complete engine and chassis rebuilds, including diagnostic procedures and detailed component information. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution scans, ensuring clarity of diagrams, illustrations, and text for printing. Binding Type Binding Type: N/A (Digital PDF Download) Paper Type Paper Type: N/A (Digital PDF Download) Searchability Searchability: Text-searchable PDF, allowing quick navigation to specific topics and components. ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, two-stroke, liquid-cooled Displacement: 124.8 cc (125cc class) Bore X Stroke: Approx. 54 mm x 54.5 mm Compression Ratio: Varies by specific model year and tuning, typically around 11.5:1 to 12.5:1 Power Delivery: Strong mid-range to top-end powerband characteristic of performance two-strokes, with a distinct power valve engagement. Performance Horsepower: Typically 28-34 HP (approximate, varies by market and tuning, e.g., restricted vs. unrestricted versions). Torque: Approx. 18-22 Nm (varied by tuning and RPM). Fuel System Fuel Delivery: Carburetor (e.g., Dell'Orto PHBH 28/30, VHSB 34). Fuel Type: Unleaded gasoline (RON 95 or higher recommended), requires 2-stroke oil premix or automatic oil injection. Cooling System Cooling Type: Liquid-cooled Engine Management Power Valve: Rotax A.E.T. (Aprilia Exhaust Control) system for enhanced torque and power delivery across the rev range. 🔧 Transmission Standard Transmission Type: 6-speed manual sequential gearbox Clutch Type: Wet, multi-plate clutch, cable-actuated. Features Gear Ratios: Specific ratios are detailed within the manual, crucial for understanding performance characteristics. Final Drive: Chain drive (e.g., 16T front sprocket, 42T rear sprocket - typical, consult manual for exact OEM specs). Fluid Specifications Gearbox Oil: API GL-4 or GL-5, SAE 75W-90 or 80W-90 transmission oil (consult manual for specific Aprilia/Rotax recommendations). 📐 Dimensions Exterior Wheelbase: Approx. 1350-1380 mm Seat Height: Approx. 805-820 mm Weights Dry Weight: Approx. 130-140 kg Fuel Tank Capacity: Approx. 13 liters (including reserve) Wheels And Tires Front Wheel Size: 17-inch Rear Wheel Size: 17-inch Front Tire Size: 110/70-17 (common fitment, consult manual for OEM) Rear Tire Size: 150/60-17 (common fitment, consult manual for OEM) 🛡️ Safety Features Ratings Safety Certification: Compliant with relevant European (e.g., Euro 1 for later models) and international motorcycle safety standards for its production era. Active Features Braking System: Dual disc front brakes (typically 280mm diameter) with 4-piston calipers (e.g., Brembo, Nissin), single disc rear brake (typically 220mm diameter) with 2-piston caliper. Lighting: Halogen headlights, LED or incandescent taillight and turn signals. Passive...