🏷️ Basic Information Identification Make: Yamaha Model: YFM400FAR Model Designation: Big Bear 400 4x4 Codes Chassis Code: YFM400FAR Engine Code Prefix: 4TF 👋 Introduction Market Position Category: Utility ATV (All-Terrain Vehicle) Target User: Off-road enthusiasts, farmers, hunters, and utility users requiring reliable 4x4 capability. Competitive Analysis Key Competitors: Honda Foreman/Rancher, Suzuki King Quad, Polaris Sportsman, Kawasaki Bayou/Brute Force. Key Features Distinguishing Features: Yamaha's reputation for reliability and durability, robust 4x4 system, comfortable ride for its class, capable of moderate towing and cargo hauling. Manual Value Proposition: Provides factory-level repair and maintenance data, empowering owners to perform their own servicing, diagnostics, and repairs, saving time and money. Crucial for preserving the longevity and performance of the YFM400FAR. 📋 Manual Details Coverage Areas Vehicle Models Covered: Yamaha YFM400FAR (and likely related YFM400 models with similar architecture) Model Years Covered: Likely covers the primary production year(s) of the YFM400FAR. Specific years should be confirmed by product listing, but typical for this generation would be early to mid-2000s. Page Count Total Pages: 397 Manual Type Type: Complete Official Factory Service / Repair / Full Workshop Manual Language Primary Language: English Format Delivery Format: PDF Download File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Comprehensive engine overhaul, disassembly, inspection, assembly, and tuning for the 386cc engine. Engine Fuel System: Carburetor (likely Mikuni BSR33) service, adjustment, and rebuilding; fuel pump operation; fuel tank and lines. Engine Ignition System: CDI unit, ignition coil, spark plug, timing checks, and troubleshooting. Transmission Drivetrain: Complete coverage of the automatic transmission (likely Ultramatic), including gearcase, drive clutch, driven clutch, belts, and drive shafts. 4X4 System: Operation and repair of the on-command 4WD system, differential, drive axles, and CV joints. Suspension Steering: Front and rear suspension components (independent front, swingarm rear), shock absorbers, steering linkage, tie rods, and wheel bearings. Braking System: Front and rear brake systems, including hydraulic lines, master cylinders, calipers, brake pads, brake shoes, and parking brake. Electrical System: Wiring diagrams, battery, charging system (stator, regulator/rectifier), starter motor, lighting (headlights, taillights, brake lights), and electrical component testing. Cooling System: Radiator, fan operation, coolant flow, and thermostat. Chassis Frame: Frame inspection and repair, body panels, fenders, racks, and seat. Procedures Included Routine Maintenance: Oil changes, filter replacements, lubrication points, valve clearance adjustment, spark plug replacement, air filter service. Troubleshooting: Systematic diagnostic procedures for common problems across all major systems, including error codes and symptom-based troubleshooting. Component Repair Rebuild: Detailed step-by-step instructions for disassembling, inspecting, cleaning, repairing, and reassembling all major mechanical and electrical components. Wiring Diagrams: Complete and clearly labeled electrical wiring schematics for easy diagnosis and repair. Torque Specifications: All critical fastener torque values for engine, chassis, and suspension components. Special Tools: Identification and usage of Yamaha-specific or recommended special tools for certain procedures. Technical Depth Depth: Full Workshop Level - covers everything from basic maintenance and fluid changes to complete engine rebuilds, transmission overhauls, and complex electrical diagnostics. 📊 Manual Specifications File Format Searchability: Keyword searchable PDF, allowing for quick access to specific topics and components. Print Quality Printability: Printable, enabling users to create hard copies for garage or field use. Zoom Functionality: Supports zoom in/out for detailed viewing of diagrams, schematics, and text. Binding Type Binding: Digital (PDF download) - no physical binding. Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: 4-Stroke, SOHC, Air-Cooled Displacement: 386 cc Bore X Stroke: 82 mm x 71.2 mm (typical for this engine) Compression Ratio: 9.2:1 (typical) Performance Horsepower: Approximately 21-23 HP (estimated, actual figures vary) Torque: Approximately 28-30 Nm (estimated, actual figures vary) Fuel System Fuel Delivery: Carburetor (Mikuni BSR33 twin-needle, constant velocity) Fuel Type: Unleaded gasoline (Octane rating to be specified in manual, typically 87 or higher) Ignition Ignition System: CDI (Capacitor Discharge Ignition) Spark Plug Type: NGK CR7E or equivalent (specific to manual) Lubrication Oil Type: Yamalube 4 (or equivalent 10W-40 API SG or higher, SJ or higher, SAE 20W-40 Type SE, SD, SC engine oil) Oil Capacity: Approx. 3.5 L (without filter change), 3.7 L (with filter change) - specific capacities to be confirmed in manual. 🔧 Transmission Standard Type: Automatic (Yamaha Ultramatic Transmission - CVT) Drive System: Shaft Drive (with selectable 2WD/4WD) Features Clutch: Automatic centrifugal clutch with V-belt Gear Reduction: High, Low, Neutral, Reverse, Park Fluid Specifications Gearcase Oil Type: Yamalube Hypoid Gear Oil (or equivalent SAE 80 API GL-4) Fluid Capacities Gearcase Oil Capacity: Approx. 0.24 L (to be confirmed in manual) 📐 Dimensions Exterior Length: Approx. 2065 mm (81.3 in) Width: Approx. 1100 mm (43.3 in) Height: Approx. 1150 mm (45.3 in) Wheelbase: Approx. 1280 mm (50.4 in) Weights Dry Weight: Approx. 262 kg (578 lbs) Towing Capacity: Up to 650 kg (1,430 lbs) (specification to be confirmed in manual) Cargo Front Rack Capacity: Approx. 45 kg (99 lbs) Rear Rack Capacity: Approx. 85 kg...