Basic Information Identification Make: Yamaha Model: WR400F Model Code: WR400F Generation Production Years: 2000-2008 Introduction Market Position Target Audience: Yamaha WR400F owners, DIY mechanics, professional technicians seeking factory data. Competitive Analysis Authenticity: Actual genuine factory service repair manual, not third-party publications. Key Features Value Proposition: Enables owners to perform maintenance and repairs independently, saving on labor costs. Provides expert-level knowledge for optimal vehicle care. Manual Details Coverage Areas Primary Coverage: Yamaha WR400F (all styles) Specific Years Covered: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Page Count Estimated Pages: Hundreds of pages Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download Manual Coverage Systems Covered Engine Systems: Fuel System, Cooling System, Engine Top End, Clutch, Engine Lubrication System, Engine Removal/Installation, Crankshaft/Transmission Chassis Systems: Wheels/Tires, Final Drive, Brakes, Suspension, Steering, Frame Electrical Systems: Electrical System, Wiring Diagrams Procedures Included Maintenance: General Maintenance, Fluid Checks and Changes, Filter Replacements, Lubrication Repair And Overhaul: Engine Repair, Transmission Overhaul, Clutch Service, Brake System Repair, Suspension Overhaul, Electrical System Troubleshooting and Repair Diagnostics: Engine Fault Symptom Diagnosis, Troubleshooting Guides, Component Testing Procedures Special Procedures: Engine Removal and Installation, Wiring Diagram Tracing, Engine Management System Analysis Technical Depth Depth Of Information: Complete factory-level diagnostics, repair, rebuilding, and restoration procedures. Covers fundamentals to advanced techniques used by factory-trained technicians. Manual Specifications File Format Format Details: PDF (Adobe Acrobat Reader required) Print Quality Printability: Printable without restriction (individual pages or entire manual) Binding Type Binding: Digital Download (user printable) Paper Type Paper Type Recommendation: N/A (Digital) Engine Specifications Primary Engine Engine Type: Liquid-cooled, 4-stroke, DOHC, 5-valve Displacement: 396cc (specific displacement may vary slightly by year, but is consistent within this model designation) Performance Bore X Stroke: 92.0 mm x 75.3 mm Compression Ratio: 12.4:1 (typical for this era WR400F) Fuel System Fuel Delivery: Carburetor (specific model varies by year, e.g., Keihin FCR) Ignition System: TCI (Transistor Controlled Ignition) Transmission Standard Transmission Type: Constant mesh, 5-speed Features Clutch Type: Wet, multiple-disc Dimensions Weights Dry Weight: Approximately 118 kg (260 lbs) - varies slightly by model year Safety Features Active Features Braking System: Hydraulic disc brakes (front and rear) Technology Features Infotainment Infotainment Features: N/A (This is a dedicated off-road motorcycle, focusing on performance and mechanicals rather than infotainment). Driver Assistance Electronic Aids: N/A (No electronic rider aids such as ABS or traction control are featured on this model). Maintenance Service Intervals Oil Change Interval: Refer to manual for specific intervals based on usage (typically every 50-100 hours of operation or annually). Air Filter Cleaning: Frequent cleaning recommended, especially in dusty conditions (refer to manual for specific frequencies). Fluid Specifications Engine Oil Type: Yamalube (or equivalent) SAE 10W-40 API SG or higher (specific viscosity and API rating detailed in manual). Coolant Type: Permanent antifreeze solution (50% ethylene glycol base) mixed with de-mineralized water. Known Issues Common Wear Items: Clutch plates, piston rings, valve seals, fork seals, chain and sprockets are common wear items requiring periodic inspection and replacement. Carburetor Tuning: Carburetor jetting may require adjustments based on altitude, temperature, and modifications. The manual will provide baseline settings and troubleshooting. Vehicle History Brand Heritage Yamaha Offroad Legacy: Yamaha has a long-standing reputation for producing high-performance off-road motorcycles, with the WR series being a staple in enduro and trail riding. Model Evolution Wr400F Development: The WR400F was a significant model in Yamaha's off-road lineup, offering a potent 4-stroke engine in a competitive chassis, bridging the gap between motocross and enduro. Awards & Recognition Recognitions Model Reputation: The WR400F was generally well-regarded for its power and capability in its class during its production run.