This manual pertains to the RS 125, a lightweight sportbike produced in 1999. Known for its racing-inspired styling and performance in the 125cc segment, the RS 125 is designed for enthusiasts seeking an agile and exciting machine. Its engineering emphasizes a potent two-stroke engine, strong braking capabilities, and a responsive chassis, making it a standout in its class. This model represents a legacy of producing high-performance motorcycles with a distinct Italian flair, offering a thrilling riding experience. The RS 125 1999 USAGE ET ENTRETIEN manual provides essential information for owners and technicians regarding the operation and maintenance of this sportbike. Covering key areas such as usage guidelines, safety procedures, engine operation, cooling system maintenance, and chassis adjustments, this French-language document serves as a comprehensive resource. With 86 pages, it offers owner-level insights into general upkeep, fluid checks, and basic operational advice, enhanced by bookmarks for improved navigation. This manual is designed to assist users in understanding and maintaining their RS 125 for optimal performance and longevity. 🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 1999 Codes Manual Product Name: APRILIA RS 125 1999 USAGE ET ENTRETIEN 👋 Introduction Market Position Motorcycle Segment: Lightweight Sportbike / Supersport Competitive Analysis Key Competitors: Yamaha YZF-R125 (later models), Honda CBR125R (later models), Cagiva Mito 125, Derbi GPR125 Key Features Design Philosophy: Racing-inspired styling and performance in the 125cc class Target Audience: Enthusiasts seeking entry-level performance and aggressive styling, riders seeking a nimble and exciting machine. 📋 Manual Details Coverage Areas Primary Coverage: Usage and Maintenance (Usage et Entretien) Page Count Total Pages: 86 Manual Type Type: Owner's Manual / User Manual Language Primary Language: French Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Operation: Included Cooling System: Included (e.g., Coolant levels, specifications) Fuel System: Not explicitly detailed but implied through usage Chassis And Controls: Included (e.g., Handlebar adjustments) Electrical System: Basic overview implied through operation Procedures Included Safety Guidelines: Included ('Conduite en Sécurité') Maintenance Checks: Included (e.g., Fluid checks, general upkeep) Adjustments: Included (e.g., Handlebar adjustments) Troubleshooting: Basic operational advice implied Technical Depth Depth: Owner-level maintenance and operation 📊 Manual Specifications File Format Quality: Standard PDF quality, likely scanned pages Searchability: Enhanced by bookmarks ('Bookmarks search') Print Quality Printable: Yes, standard PDF printing Binding Type Binding: N/A (PDF format) Paper Type Paper: N/A (PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder, liquid-cooled Displacement: 124.8 cc (7.6 cu in) Bore X Stroke: 54 mm x 54.5 mm (approx.) Power Delivery: Known for its aggressive powerband, typical of 125cc two-strokes. Performance Horsepower: Approx. 30-34 HP (varies by market and restrictor status) Torque: Approx. 2.2-2.5 kg-m (16-18 lb-ft) at peak RPM Fuel System Carburetion: Likely a Dell'Orto PHBH 28 or similar high-performance carburetor Fuel Type: Unleaded gasoline with 2-stroke oil pre-mix or separate oil injection system Oil System: Automatic oil injection (Rotax 123 engine characteristic) 🔧 Transmission Standard Type: 6-speed manual Optional Options: N/A for this model year and segment Features Clutch: Wet multi-plate clutch Gear Ratios: Specific ratios would be detailed in a full service manual; optimized for sporty performance. 📐 Dimensions Exterior Length: Approx. 1980 mm (78 inches) Width: Approx. 730 mm (28.7 inches) Height: Approx. 1100 mm (43.3 inches) Wheelbase: Approx. 1375 mm (54.1 inches) Weights Dry Weight: Approx. 131 kg (289 lbs) Fuel Capacity: Approx. 13 Liters (3.4 US gallons) 🛡️ Safety Features Ratings Crash Test Results: N/A (Motorcycle, not typically rated by consumer organizations like NHTSA/Euro NCAP) Active Features Braking System: Hydraulic disc brakes front and rear Front Brake Spec: 320mm disc, 4-piston caliper (typical for this model) Rear Brake Spec: 240mm disc, 2-piston caliper (typical for this model) Suspension Front: Upside-down telescopic forks (e.g., Marzocchi or Paioli) Suspension Rear: Monoshock with adjustable preload Passive Features Lighting: Halogen headlight, LED taillight (typical) Tires Front: 110/70-17 Tires Rear: 150/60-17 💡 Technology Features Infotainment Features: Basic instrumentation: speedometer, tachometer, odometer, coolant temperature warning light. No modern infotainment systems. Driver Assistance Features: None (standard for motorcycles of this era) Connectivity Features: None 🔧 Maintenance Service Intervals Oil Change Frequency: Manual will specify, typically based on mileage or operating hours for oil injection system. Regular checking of oil level is crucial. Spark Plug Replacement: Recommended intervals for optimal two-stroke performance (e.g., every few thousand miles). Air Filter Cleaning: Regular inspection and cleaning/replacement recommended, especially in dusty conditions. Fluid Specifications Coolant Type: The manual will specify the correct type of antifreeze/coolant mixture (e.g., Ethylene Glycol based). Brake Fluid Type: DOT 4 recommended for hydraulic brake systems. Transmission Oil: Separate oil for the gearbox; specific viscosity grade will be listed in the manual. Two Stroke Oil: High-quality 2-stroke synthetic or semi-synthetic oil specifically designed for liquid-cooled, high-performance engines. Known Issues Two Stroke Maintenance: Two-stroke engines require diligent maintenance; carbon buildup in the exhaust and cylinder head is common if not properly...