The Runner 50 SP, produced from 1999 to 2004, is a performance-oriented sport scooter celebrated for its dynamic styling and agile handling. This model, part of the well-regarded Runner series, offers a potent 49.3 cc liquid-cooled, 2-stroke engine, delivering an approximate 5-7 horsepower. Known for its sporty appeal and often compared to competitors like the Aprilia SR50, it features a robust steel frame and a reliable automatic Continuously Variable Transmission (CVT) system. The Runner 50 SP is engineered to provide an engaging riding experience for enthusiasts seeking a capable and stylish urban commuter. This comprehensive factory service repair workshop manual provides in-depth guidance for the maintenance and repair of the Runner 50 SP from 1999 to 2004. It covers all essential systems, including detailed procedures for the engine mechanicals, fuel and ignition systems, cooling, transmission, braking, suspension, steering, electrical system, and bodywork. The manual offers step-by-step instructions, troubleshooting charts, diagnostic procedures, and highlights required special tools. With hundreds of detailed photos and exploded diagrams, this resource is invaluable for owners, mechanics, and technicians aiming to ensure the optimal performance and longevity of their Runner 50 SP. 🏷️ Basic Information Identification Make: Gilera Model: Runner 50 SP Model Variant: SP (Sport Production) Production Years Covered: 1999, 2000, 2001, 2002, 2003, 2004 Product Type: Service Repair Workshop Manual Download PDF 👋 Introduction Market Position Vehicle Type: Sport Scooter Target Audience: Enthusiasts and owners seeking in-depth knowledge for maintenance and repair Competitive Analysis Class Competitors: Aprilia SR50, Malaguti F12, Yamaha Aerox 50 Key Features Vehicle Appeal: Performance-oriented 50cc scooter with sporty styling and handling Manual Value Proposition: Provides factory-level repair information for DIY maintenance and professional service 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and troubleshooting procedures Component Coverage: Engine, transmission, chassis, electrical system, bodywork, suspension, brakes, cooling system, fuel system, exhaust system, steering Page Count Estimated Pages: Hundreds of pages (specific count not provided, but described as extensive) Manual Type Type: Factory Service Repair Workshop Manual Language Language: English (implied by product description and common industry practice for such manuals) Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine disassembly, assembly, component inspection, and rebuild procedures Engine Fuel System: Carburetor tuning, fuel pump, fuel lines, fuel tank service Engine Ignition System: Ignition coil, spark plug, CDI unit, timing adjustments Engine Cooling System: Radiator, water pump, coolant hoses, thermostat service Transmission Drivetrain: Automatic transmission (CVT) service, variator, clutch operation, gear oil change Braking System: Front and rear brake caliper service, brake pad replacement, brake fluid flush, hydraulic system troubleshooting Suspension Steering: Front fork disassembly, rear shock absorber replacement, steering bearing service, wheel alignment checks Electrical System: Wiring diagrams, battery service, lighting system, starter motor, charging system, fuse box diagnostics Bodywork Frame: Fairing removal and installation, seat adjustment, body panel repair, frame inspection Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, fluid level checks, brake adjustments Troubleshooting: Diagnostic charts, symptom-based fault finding, electrical and mechanical issue resolution Repair Rebuild: Step-by-step instructions for component replacement and major overhaul Diagnostics: Testing procedures for electrical components, mechanical tolerances, and system performance Technical Depth Depth: Professional-level, covering all repair and service operations Diagrams Illustrations: Hundreds of detailed photos and exploded diagrams Special Tools: Identifies and describes required special tools for specific procedures 📊 Manual Specifications File Format Format: PDF Compatibility: Windows and MAC computers, tablets, smartphones Print Quality Printable: Yes, single pages or entire manual Binding Type Binding: Digital (N/A for PDF download) Paper Type Paper Type: Digital (N/A for PDF download) Licensing Usage Rights: Lifetime use, unlimited installations ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, single-cylinder Engine Displacement: 49.3 cc (approx.) Cooling System: Liquid-cooled Bore X Stroke: 39.0 mm x 41.4 mm (typical for Piaggio/Gilera 50cc engines of this era) Compression Ratio: Approx. 7.8:1 - 8.0:1 (typical) Performance Horsepower: Approximately 5-7 HP (stock, depending on specific tune and emissions regulations) Torque: Not explicitly stated, but typically around 5-6 Nm Fuel System Carburetor Model: Dell'Orto PHVA 12 or similar Fuel Type: Unleaded gasoline (min. 95 RON recommended for 2-stroke) Lubrication Oil Mixture: Automatic oil injection system Engine Codes Engine Family: Piaggio Hyper 2 (likely base for this model) 🔧 Transmission Standard Transmission Type: Automatic (Continuously Variable Transmission - CVT) Drive Type: Belt drive to rear wheel Features Variator: Primary drive variator for automatic gear ratio adjustment Clutch: Centrifugal clutch Fluid Requirements Gear Oil Type: API GL-3 or GL-4 gear oil (specific viscosity typically 75W-80 or 80W-90) Gear Oil Capacity: Approximately 100-150 ml (refer to manual for exact capacity) 📐 Dimensions Exterior Length: Approx. 1850 mm (typical) Width: Approx. 740 mm (typical) Height: Approx. 1180 mm (typical) Weights Dry Weight: Approx. 110 kg (typical) Gross Vehicle Weight: Not specified, but typically around 260 kg Wheels Tires Front Tire Size: 120/70-13 (typical) Rear Tire Size: 130/60-13 (typical) Wheel Bolt...