🏷️ Basic Information Identification Make: Yamaha Model: XS400 Year: 1982 Codes Engine Code General: 4G5 (typically) Chassis Code General: 4G5 (often shared with engine) 👋 Introduction Market Position Target User: Owners of the Yamaha XS400 (1982 model) seeking to maintain, repair, or restore their motorcycle. Value Proposition: Provides professional-level repair and maintenance information in an accessible digital format, saving costs on shipping and professional labor. Competitive Analysis Advantage Over Physical Manuals: Instant availability, no shipping costs, printable pages, digital storage, and searchability. Key Features Instructional Format: Numbered instructions, detailed sub-steps, notes, cautions, and warnings. Visual Aids: Detailed illustrations, drawings, photos, and enlarged inset views. Navigation: Numbered table of contents for fast information retrieval. Electrical Diagnostics: Combined troubleshooting and electrical service procedures with detailed wiring diagrams. 📋 Manual Details Coverage Areas Primary Focus: Full Service Repair Scope: Repair, Maintenance, Rebuild, Refurbish, Restoration Diagnostic Coverage: Comprehensive Diagnostic Procedures Technical Level Target: Professional Technicians and DIY Mechanics Page Count Estimated Pages: Detailed (Exact count not specified, but described as 'very detailed') Manual Type Type: Full Service Repair Manual Language Primary Language: English Format Delivery Method: Instant Download File Format: PDF Print Ability: Full Printable Requirements Software Requirements: Adobe PDF Reader, WinRAR Operating System Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine: Comprehensive engine repair, rebuild, and tuning Fuel System: Carburetor adjustment, cleaning, and overhaul; fuel delivery system Ignition System: Ignition timing, components (spark plugs, coils, CDI unit) Electrical System: Wiring diagrams, troubleshooting, charging system, lighting, starting system Transmission: Gearbox inspection, maintenance, and repair (likely 5-speed) Drivetrain: Chain drive maintenance and adjustment Suspension: Front fork servicing (oil changes, seals), rear shock absorber inspection Brakes: Front and rear brake system maintenance, fluid replacement, caliper/master cylinder service Wheels And Tires: Tire pressure, wheel bearing inspection, spoke tensioning (if applicable) Frame And Bodywork: Frame inspection, minor bodywork repair procedures, panel removal/installation Cooling System: Air-cooled engine, no specific liquid cooling system coverage Exhaust System: Inspection and potential repair/replacement of exhaust components Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, lubrication Repair: Step-by-step repair instructions for all major components Rebuild: Detailed engine and component rebuild procedures Troubleshooting: Systematic troubleshooting guides for common and complex issues Diagnostics: Electrical system diagnostics with detailed wiring diagrams Adjustments: Carburetor synchronization, valve clearance adjustment, cable adjustments Technical Depth Depth: Comprehensive (from basic maintenance to complete overhaul) Information Source: Same information used by professional technicians 📊 Manual Specifications File Format Format Type: PDF Storage: Save to hard drive, burn to CD-ROM Print Quality Print Readability: High (implied by 'Full Printable' and detailed illustrations) Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Quality: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, parallel-twin Displacement: 392 cc (approx.) Bore X Stroke: 64.0 mm x 62.0 mm (typical for this era XS400) Compression Ratio: 9.2:1 (typical) Valve Arrangement: SOHC, 2 valves per cylinder Carburetion: Dual Mikuni VM34 (typically 34mm constant velocity carburetors) Performance Horsepower Estimated: Approx. 27-33 HP @ 7500 RPM (depending on specific market/tuning) Torque Estimated: Approx. 23-26 lb-ft @ 6000 RPM Fuel System Fuel Delivery: Carbureted Fuel Type: Unleaded gasoline Engine Lubrication Oil Type: API SE, SF or SG classification 20W-40 or 10W-30 recommended by Yamaha. Oil Capacity: Approx. 2.2 liters (2.3 US qt) with filter change 🔧 Transmission Standard Type: 5-speed constant mesh Clutch: Wet, multiple disc Features Gear Ratios: Specific gear ratios are detailed within the manual. Final Drive: Chain drive Transmission Fluid Fluid Type: Refer to manual for specific recommendations (typically SAE 10W-30 or 20W-40 motorcycle gear oil). 📐 Dimensions Exterior Wheelbase: Approx. 1405 mm (55.3 in) Length: Approx. 2135 mm (84.1 in) Weights Dry Weight: Approx. 172 kg (379 lbs) Wet Weight: Approx. 187 kg (412 lbs) (with fluids) 🛡️ Safety Features Ratings Safety Standard: As per 1980s motorcycle safety standards; manual provides maintenance for safety-critical systems. Active Features Braking System: Dual front disc brakes, single rear disc brake (common for this model). Lighting System: Headlight, taillight, brake lights, turn signals (all covered in electrical section). 💡 Technology Features Infotainment Infotainment System: Not applicable. This is a 1982 motorcycle with analog instrumentation. Driver Assistance Assistance Features: Not applicable. This is a 1982 motorcycle. Connectivity Connectivity Features: Not applicable. This is a 1982 motorcycle. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 km (2,000-3,000 miles) or 6 months, as specified in the manual. Valve Clearance Check: Typically every 6,000-10,000 km (4,000-6,000 miles), detailed in the manual. Spark Plug Replacement: Recommended at intervals specified in the manual, often every 10,000-15,000 km (6,000-9,000 miles). Chain Lubrication Adjustment: Recommended every 500-1,000 km (300-600 miles) and after washing/rain. Fluid Specifications Brake Fluid: DOT 3 or DOT 4 brake fluid (refer to manual for specific type and replacement interval). Known Issues Carburetor Issues: Common issues include vacuum leaks, sticking slides, and synchronized imbalances, all...