The Yamaha WR250F and WR250FR, produced between 2000 and 2009, represent a lineage of high-performance off-road motorcycles engineered for demanding terrain and competitive riding. These models are celebrated for their lightweight chassis, potent 250cc four-stroke engines, and adjustable suspension systems, offering riders exceptional agility and power. Building on a rich motorsport heritage, the WR250F series is known for its robust build quality and reliability, making it a popular choice among off-road enthusiasts and racers seeking a capable and durable machine for enduro and motocross applications. This comprehensive workshop service manual provides essential information for maintaining and repairing the Yamaha WR250F and WR250FR models from 2000 to 2009. It covers a wide array of critical systems, including detailed engine service, transmission overhaul, fuel and ignition systems, lubrication, exhaust, electrical components, bodywork, chassis, braking, cooling, and suspension. The manual offers step-by-step instructions for routine maintenance, troubleshooting, component removal and installation, and complete repair procedures, making it an invaluable resource for professional technicians and experienced DIY mechanics aiming to ensure optimal performance and longevity. 🏷️ Basic Information Identification Make: Yamaha Model: WR250F / WR250FR Model Code: WR250FR Generation Production Years: 2000-2009 Codes Engine Codes: Likely 250cc 4-stroke single-cylinder (specific codes not provided, but typical for this model series) 👋 Introduction Market Position Positioning: Designed for the off-road enthusiast and competitor, the WR250F is a high-performance dirt bike known for its agility and power. Competitive Analysis Competitors: Directly competes with other 250cc off-road motorcycles from manufacturers like Honda (CRF250X), Kawasaki (KLX250S), and KTM (250 EXC-F). Key Features Features: Lightweight chassis, potent 4-stroke engine, adjustable suspension, and off-road specific components. 📋 Manual Details Coverage Areas Vehicle Models Covered: Yamaha WR250F, Yamaha WR250FR Model Years Covered: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Page Count Total Pages: 341 Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Service: Complete engine disassembly, assembly, overhaul, diagnostics, and tuning. Transmission Service: Removal, installation, disassembly, assembly, and troubleshooting of the transmission system. Fuel System: Carburetor systems, fuel delivery, fuel tank, and related components. Ignition System: Ignition timing, spark plug specifications, CDI unit, and related electrical components. Lubrication System: Oil pump operation, oil filter replacement, oil change procedures, and lubrication points. Exhaust System: Exhaust pipe, muffler, and related components. Electrical System: Wiring diagrams, battery, charging system, lighting, and electronic components. Bodywork And Chassis: Frame, body panels, seating, handlebars, and suspension components. Braking System: Front and rear brake system maintenance, repair, and bleeding procedures. Cooling System: Radiator, coolant, fan operation, and related components. Suspension And Steering: Front fork, rear shock absorber, linkage, and steering assembly. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, and general upkeep. Troubleshooting: Diagnostic procedures for identifying and resolving common and uncommon issues. Repair And Overhaul: Step-by-step instructions for repairing and completely rebuilding all major components. Component Removal Installation: Detailed instructions for removing and reinstalling various parts and assemblies. Tune Ups: Procedures for engine tuning, carburetor adjustments, and performance optimization. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds. Target Audience: Professional mechanical technicians and experienced DIY enthusiasts. Proprietary Components: Includes instructions for proprietary components and references manufacturer guidelines where applicable. 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Yes, printable Binding Type Binding Type: Not applicable (Digital PDF) Paper Type Paper Type: Not applicable (Digital PDF) Delivery Delivery Method: Fast and Free Electronic Delivery via Email ⚙️ Engine Specifications Primary Engine Type: 4-stroke, liquid-cooled, DOHC, single-cylinder Displacement: 250cc (Specific bore and stroke may vary slightly across model years within this range, typical is around 74mm bore x 57.5mm stroke) Compression Ratio: Typically in the range of 10.5:1 to 12.5:1 (refer to manual for exact year-specific data) Performance Horsepower: Estimated 30-35 HP at the crank (actual figures vary by year and tuning) Torque: Not explicitly stated, but optimized for off-road torque delivery. Fuel System Carburetor: Mikuni (e.g., VM34SS or similar constant-velocity carburetor typical for this era) Fuel Type: Unleaded gasoline (typically 91 octane or higher) Lubrication System Oil Type: Yamalube 4 (or equivalent JASO MA certified 10W-40 or 20W-50 motorcycle oil) Oil Capacity: Approximately 1.5-1.8 liters (refer to manual for precise capacity with filter change) 🔧 Transmission Standard Type: 5-speed constant mesh Optional Optional Gearbox: N/A Features Clutch Type: Wet, multi-plate Final Drive: O-ring sealed chain 📐 Dimensions Exterior Length: Varies slightly by year, typically around 2170 mm Width: Varies slightly by year, typically around 820 mm Height: Varies slightly by year, typically around 1295 mm Weights Dry Weight: Approximately 112-115 kg (dry) Wet Weight: Approximately 118-122 kg (wet, with all fluids) Fuel Capacity: Approximately 8.0 - 9.0 liters 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle safety is primarily based on rider skill and adherence to safe operating practices, not formal...