The Yamaha Spark 135 is a highly regarded underbone motorcycle, produced from 2005 to 2010. Known for its liquid-cooled 135 cc engine, automatic clutch with manual shifting, and agile handling, it has been a popular choice for daily commuting and light sport riding in various Asian markets. Its robust construction and sporty styling, combined with a legacy of reliability, make it a dependable and enjoyable machine. Key features include a responsive braking system and durable body panels, contributing to both performance and rider safety. This comprehensive workshop repair service manual provides detailed information to assist owners and technicians in maintaining and repairing the Yamaha Spark 135. It covers all essential systems, including the engine, transmission, electrical components, suspension, brakes, fuel system, and chassis. Within its 346 pages, you will find step-by-step procedures for routine maintenance, component-level repairs, engine and transmission rebuilds, troubleshooting common issues, and detailed wiring diagrams. The manual assumes an intermediate level of mechanical knowledge and is designed to facilitate all aspects of vehicle upkeep and repair. 🏷️ Basic Information Identification Make: Yamaha Model: Spark 135 Model Variant: Motorcycle (Underbone) Generation Generation Code: First Generation (Pre-Fuel Injection) Codes Chassis Code Range: LC135 / SE/SX/ES/GT (Specific codes vary by sub-model and region) 👋 Introduction Market Position Market Position: The Yamaha Spark 135 is a popular underbone motorcycle known for its reliability, fuel efficiency, and sporty performance, particularly in Asian markets. It serves as an everyday commuter and a capable light sport bike. Competitive Analysis Competitors: Honda Wave 125, Suzuki Raider 150, Modenas Kriss 120. Key Features Key Features: Liquid-cooled engine, underbone chassis, agile handling, durable construction, automatic clutch (on many variants), sporty styling. 📋 Manual Details Coverage Areas Years Covered: 2005, 2006, 2007, 2008, 2009, 2010 Page Count Page Count: 346 Manual Type Manual Type: Workshop Repair Service Manual Language Language: English (assumed based on common industry practice for downloadable manuals) Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine System: Complete engine overhaul, tuning, diagnostics, cooling system, lubrication system. Transmission System: Clutch operation, gear shifting mechanisms, internal transmission component inspection and repair. Electrical System: Ignition system, lighting, charging system (stator, regulator/rectifier), battery, starting system, wiring diagrams, fault diagnosis. Suspension System: Front fork (telescopic), rear shock absorber(s), swingarm inspection and maintenance. Brake System: Front and rear brake system inspection, maintenance, repair (drum and/or disc brakes depending on sub-model), hydraulic system (if applicable). Fuel System: Carburetor inspection, cleaning, adjustment, fuel tank, fuel lines. Chassis And Bodywork: Frame inspection, body panel removal and installation, seating, fairings, fenders. Wheels And Tires: Wheel bearing maintenance, tire inspection and replacement, spoke tension (if applicable). Procedures Included Maintenance: Routine maintenance checks, lubrication, filter replacement, spark plug replacement, valve clearance adjustment. Repair: Component-level repair and replacement for all major systems. Troubleshooting: Diagnostic charts and procedures for identifying and resolving common issues. Rebuild: Detailed procedures for engine and transmission rebuilds. Wiring Diagrams: Comprehensive electrical system wiring schematics. Technical Depth Depth: Comprehensive, covering all aspects from basic maintenance to complete engine and transmission rebuilds. Assumes intermediate mechanical knowledge. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High resolution for clear diagrams and text (assumed for professional service manuals). Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, 4-valve, Liquid-cooled Displacement: 135 cc Bore X Stroke: Approx. 52.0 x 60.5 mm (verify specific sub-model) Performance Horsepower: Approx. 11-12 PS (varies slightly by sub-model and tuning) Torque: Approx. 10-11 Nm (varies slightly by sub-model and tuning) Fuel System Fuel Delivery: Carburetor (e.g., Mikuni VM24 or similar, specific model may vary) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Cooling System Cooling Method: Liquid Cooling 🔧 Transmission Standard Transmission Type: Automatic Clutch with Manual Gear Shifting (4-speed or 5-speed, depending on sub-model) Optional Optional Transmission: N/A (Automatic clutch is standard for this model range) Features Clutch Type: Wet, multi-plate automatic clutch 📐 Dimensions Exterior Length: Approx. 1900 mm (variable by sub-model) Width: Approx. 700 mm (variable by sub-model) Height: Approx. 1050 mm (variable by sub-model) Weights Dry Weight: Approx. 100-105 kg (variable by sub-model) Fuel Tank Capacity: Approx. 4.0 liters 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle safety is typically assessed differently than cars, focusing on rider protection and handling dynamics). Active Features Active Safety Features: Responsive braking system (disc front, drum/disc rear depending on variant), agile chassis for evasive maneuvers. Passive Features Passive Safety Features: Robust frame construction, durable body panels. 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle with analog instrumentation). Driver Assistance Driver Assistance Features: N/A Connectivity Connectivity Options: N/A Instrumentation Instrumentation: Analog speedometer, tachometer, fuel gauge, engine temperature gauge, turn signal indicators, high beam indicator. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 - 5,000 km or 6 months, whichever comes first (refer to manual...