🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 1998 Product Type: Full Service Repair Manual Generation Model Generation: First Generation (Rotax 122) 👋 Introduction Market Position Market Segment: High-performance 125cc sportbike, popular in European markets for its racing heritage and track-day capability. Competitive Analysis Key Competitors: Yamaha YZF-R 125, Honda CBR125R, Suzuki GSX-R125, Cagiva Mito 125. Key Features Vehicle Design Philosophy: Race-inspired styling, aggressive ergonomics, lightweight chassis, and a potent two-stroke engine for its class. Key Features Manual Manual Value Proposition: Provides the necessary technical knowledge to maintain and repair the RS 125, enabling owners to keep their iconic Italian sportbike in peak condition. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive repair, maintenance, and overhaul of the Aprilia RS 125 (1998 model year). Page Count Estimated Page Count: Refer to product packaging for exact count; typically 300-500 pages for full service manuals of this era. Manual Type Manual Type: Service Manual / Repair Manual Language Language: Likely English (standard for major repair manuals, but confirmation recommended). Format Format: Digital (PDF) or Printed Copy (depending on vendor). 📖 Manual Coverage Systems Covered Engine System: Complete engine disassembly, assembly, inspection, and repair. Includes top-end (cylinder, piston, head), bottom-end (crankshaft, connecting rod, bearings), cooling system, lubrication system. Fuel System: Carburetor tuning, jetting, float adjustment, fuel pump, fuel lines, and fuel tank maintenance. Ignition System: CDI unit, spark plug, ignition coil testing, timing checks. Exhaust System: Pipe maintenance, expansion chamber principles, exhaust valve operation and adjustment. Transmission System: Gearbox disassembly, assembly, gear inspection, clutch operation, chain and sprocket maintenance. Cooling System: Radiator, coolant, water pump, thermostat inspection and service. Electrical System: Wiring diagrams, battery maintenance, charging system (alternator, regulator), lighting system, starter system, switchgear. Braking System: Front and rear brake caliper service, master cylinder overhaul, brake pad replacement, brake fluid bleeding, rotor inspection. Suspension System: Front fork disassembly, seal replacement, oil level and type specification, rear shock absorber service, linkage lubrication. Steering System: Headset bearing inspection and adjustment, steering lock operation. Chassis Frame: Frame inspection, swingarm bearings, wheel bearing service. Bodywork Trim: Fairing removal and installation, seat, fuel tank, and other body panel service. Procedures Included Preventative Maintenance: Scheduled maintenance tasks, oil changes, filter replacements, chain lubrication and adjustment, brake fluid checks. Troubleshooting: Diagnostic procedures for common running issues, electrical faults, and mechanical problems. Component Overhaul: Detailed step-by-step instructions for rebuilding key components like the engine, gearbox, and suspension. Adjustments: Carburetor synchronization, clutch cable adjustment, throttle cable adjustment, suspension sag adjustment. Wiring Diagrams: Full electrical schematics for troubleshooting and repairs. Torque Specifications: Critical torque values for engine fasteners, chassis bolts, and suspension components. Technical Depth Depth Level: In-depth technical repair and overhaul procedures suitable for experienced DIY mechanics and professional technicians. Diagnostic Capability: Covers troubleshooting for performance issues, starting problems, and component failures. Rebuild Scope: Enables complete engine, gearbox, and major component rebuilds. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format), typically with searchable text for easy navigation. Print Quality Print Quality Digital: High-resolution scans or professionally produced digital documents with clear diagrams and legible text. Binding Type Binding Type Physical: If printed: Comb-bound, perfect-bound, or spiral-bound for lay-flat usability. Paper Type Paper Type Physical: If printed: Durable, possibly laminated or coated paper to withstand workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder. Engine Code: Rotax 122 (common for this generation). Displacement: 125 cc (124.8 cc). Bore X Stroke: 54 mm x 54.5 mm. Compression Ratio: Approximately 12.0:1 (subject to specific tune). Power Delivery: Designed for peak power delivery in the mid-to-high RPM range characteristic of performance two-strokes. Performance Horsepower Estimate: Around 30-34 HP (subject to regional restrictions and specific tuning). Officially, often quoted lower for licensing purposes. Torque Estimate: Approximately 20-22 Nm. Fuel System Carburetor Type: Dell'Orto PHBH 28 (or similar performance carb). Fuel Type: Unleaded gasoline (min 95 octane recommended). Fuel Delivery: Gravity feed with a fuel pump (diaphragm type). Lubrication Oil Mixture: Premix or separate oil injection system (automatic). Oil Type Injection: High-quality two-stroke synthetic oil specifically for racing or high-performance applications. 🔧 Transmission Standard Transmission Type: 6-speed manual sequential gearbox. Clutch Type: Wet multi-plate clutch. Features Gear Ratios: Specific gear ratios will be detailed in the manual, crucial for performance tuning. Final Drive: Chain drive (typically 520 pitch). Transmission Fluid: Gearbox oil (e.g., SAE 75W/90 or specific Aprilia recommendation). 📐 Dimensions Exterior Length: Refer to official specifications; typically around 1950 mm. Width: Refer to official specifications; typically around 720 mm. Height: Refer to official specifications; typically around 1050 mm. Wheelbase: Refer to official specifications; typically around 1370 mm. Weights Dry Weight: Approximately 135 kg (subject to variations). Fuel Capacity: Approx. 14 liters (including reserve). 🛡️ Safety Features Ratings Safety Standards: Designed to meet European safety standards for motorcycles of its class and era. Active Features Braking System Type: Disc brakes...