🏷️ Basic Information Identification Make: Yamaha Model: XS400 Model Variants Covered: XS400 Standard, XS400 Special, XS400 Maxim, XS400SE, XS400SG, XS400SJ, XS400SK, XS400SL, XS400SN Production Years Covered: 1982-1993 Codes Chassis Codes General: 4G0, 2KF, 2KK, 3G3, 5E8, 5E9 👋 Introduction Market Position Target Audience: Yamaha XS400 owners, independent motorcycle mechanics, and enthusiasts performing their own maintenance and repairs. Value Proposition: Provides comprehensive, factory-level information for all service, repair, and troubleshooting tasks, equivalent to what professionals use. Competitive Analysis Manual Type Comparison: This is a full factory service manual, offering significantly more detail and accuracy than generic aftermarket 'repair' books. Key Features Completeness: Full, unrestricted access to all repair and maintenance procedures, no trial or limited versions. Accessibility: Instant download, usable on multiple devices and computers without expiry. Visual Aid: Contains detailed photos and exploded diagrams to guide users through complex procedures. 📋 Manual Details Coverage Areas Documentation Type: Factory Service Repair Workshop Manual Format: Downloadable PDF Language: English Page Count Estimated Page Count: Hundreds (specific count not provided, but described as 'hundreds of pages') Manual Type Type: Comprehensive Service, Repair, and Troubleshooting Manual 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, inspection, timing, valve clearance, piston/ring inspection, crankshaft/connecting rod checks, oil pump. Fuel System: Carburetor identification, adjustment, cleaning, synchronization; fuel tank, fuel pump, fuel lines. Ignition System: CDI system, ignition timing, spark plugs, ignition coils, pickup coils. Transmission Drivetrain: Clutch operation, inspection, adjustment; gearbox disassembly, assembly, inspection; final drive (chain). Electrical System: Wiring diagrams, battery maintenance, charging system (stator, rectifier/regulator), starter motor, lighting system, horn, switches. Brake System: Front and rear brake inspection, adjustment, overhaul (disc and drum), brake fluid replacement. Suspension Steering: Front fork overhaul, rear shock absorber replacement, steering head bearing adjustment and replacement. Frame Bodywork: Frame inspection, seat, fuel tank removal/installation, fenders, handlebars, control levers. Troubleshooting: Diagnostic charts for common problems and their solutions across all major systems. Procedures Included Routine Maintenance: Oil changes, filter replacement, chain lubrication and adjustment, air filter cleaning/replacement, spark plug checks, brake adjustments, tire pressure. Engine Repair: Top-end rebuild, bottom-end rebuild, complete engine overhaul. Carburetor Service: Detailed disassembly, cleaning, reassembly, and jetting information. Electrical Diagnostics: Fault finding for charging system, ignition system, starting system, and lighting issues. Brake System Overhaul: Master cylinder, caliper, and slave cylinder rebuilds (if applicable). Suspension Rebuild: Fork seal replacement, fork oil changes, shock absorber servicing. Wheel Tire Service: Wheel bearing replacement, tire mounting/balancing (general guidance). Technical Depth Diagnostic Capabilities: Covers basic electrical testing, mechanical run-out checks, and component performance verification. Rebuild Procedures: Detailed step-by-step instructions for complete engine, transmission, and suspension rebuilds. Special Tools: Likely lists or implies the use of specific Yamaha special tools for certain procedures, typical for factory manuals. Specifications Data: Includes critical torque values, clearances, fluid types, and capacities for all components. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Compatibility: Compatible with Windows and macOS operating systems. Features: Searchable text, clickable table of contents (typical for well-made PDFs). Print Quality Printability: Printable, allowing users to print single pages or the entire manual. Binding Type Binding: N/A (Digital Download - PDF) Paper Type Paper Type: N/A (Digital Download - PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, DOHC, Parallel-Twin Displacement: 395 cc (approx.) Bore X Stroke: 68.0 mm x 54.4 mm (typical for 400cc Yamaha twins of this era) Compression Ratio: 9.2:1 to 9.5:1 (varies slightly by model year/variant) Performance Horsepower Output: Approx. 36-43 HP @ 9000 RPM (varies by model year/variant and tuning) Torque Output: Approx. 26-30 lb-ft @ 7500 RPM (varies by model year/variant) Fuel System Carburetion: Dual Mikuni VM34 or BD carbs (depending on model year) Fuel Type: Unleaded gasoline (minimum 87 octane recommended) 🔧 Transmission Standard Transmission Type: Constant Mesh, 5-speed Clutch Type: Wet, multi-plate Final Drive: Chain Drive Features Gear Ratios: Specific ratios detailed within the manual for each gear. 📐 Dimensions Exterior Overall Length: Varies by model (e.g., approx. 2145 mm for XS400 Special) Overall Width: Varies by model (e.g., approx. 750 mm for XS400 Special) Overall Height: Varies by model (e.g., approx. 1180 mm for XS400 Special) Weights Dry Weight: Approx. 170-185 kg (varies significantly by model variant) Wet Weight: Not explicitly provided, but estimated to be 10-15 kg heavier than dry weight. 🛡️ Safety Features Ratings Safety Features General: Designed with basic motorcycle safety standards of the era. No formal crash ratings apply to motorcycles in the same way as cars. Active Features Braking System: Hydraulic front disc brake, rear drum brake (or dual discs on some later/special models). Passive Features Lighting: Headlight, taillight, brake light, turn signals, instrument panel illumination. 💡 Technology Features Infotainment Instrumentation: Analog speedometer, tachometer, odometer, trip meter, indicator lights (neutral, turn signals, oil pressure, high beam). Driver Assistance ABS: N/A (ABS was not a feature on this model) Connectivity Connectivity Features: N/A (No electronic connectivity...