This manual covers the Yamaha Bruin 350 4x4 All-Terrain Vehicle (ATV) models from 2004, 2005, and 2006. The Bruin 350 is a capable mid-size utility ATV known for its comfortable ride and reliable four-wheel-drive capability, building on a legacy of powersports innovation. This model features a 348 cc air-cooled engine, automatic YCVT transmission, and a selectable 4WD system with automatic front differential lock, making it suitable for a variety of off-road applications. This comprehensive English-language manual provides detailed service, repair, and maintenance information. It includes procedures for engine overhaul, transmission service, drivetrain maintenance, suspension and brake system repairs, electrical system diagnostics, and fuel and cooling system servicing. The manual also covers frame and body work, wheel and tire maintenance, scheduled maintenance tasks, troubleshooting common issues, and complete rebuild procedures. With over 500 pages of detailed instructions, including pictures and exploded diagrams, this manual is an essential resource for maintaining and repairing your Yamaha Bruin 350 4x4. 🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 4x4 Model Years Covered: 2004, 2005, 2006 Vehicle Type: All-Terrain Vehicle (ATV) Codes Engine Code Prefix: 3GD Chassis Code Prefix: 4X4 👋 Introduction Market Position Positioning: Essential resource for owners and technicians of the Yamaha Bruin 350 4x4. Competitive Analysis Value Proposition: Offers a comprehensive, accurate, and searchable digital resource superior to generic manuals or incomplete online guides. Key Features Key Selling Points: Combined Service and Owner's Manual set, detailed procedures with pictures, exploded diagrams, troubleshooting guide, 4WD system coverage, keyword searchable PDF. 📋 Manual Details Coverage Areas Primary Coverage: Complete service, repair, and maintenance for 2004-2006 Yamaha Bruin 350 4x4 ATVs. Included Manuals: Service Manual (Workshop Repair) and Owner's/Maintenance Manual. Page Count Estimated Service Manual Pages: 500+ Estimated Owner Manual Pages: 100+ Manual Type Primary Manual Type: Service Manual / Workshop Manual / Repair Manual Secondary Manual Type: Owner's Manual / Maintenance Manual Language Language: English Format Format: Downloadable PDF Searchability: Keyword searchable (Ctrl+F enabled) Printability: Printable 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tuning, diagnostics, valve adjustments, top-end rebuilds. Transmission: Internal components, gear replacement, clutch operation, final drive service. Drivetrain: 4WD system engagement, driveshafts, differentials, CV joints. Suspension: Front and rear suspension systems, shock absorbers, A-arms, linkages, bushings. Brakes: Hydraulic system, caliper service, pad replacement, rotor inspection, bleeding procedures. Electrical: Wiring diagrams, lighting system, ignition system, charging system, starter, battery, ECU troubleshooting. Fuel System: Carburetor servicing and adjustment, fuel pump, fuel lines, fuel filter. Cooling System: Radiator, fan, coolant hoses, thermostat. Exhaust System: Muffler, pipe inspection and replacement. Frame And Body: Chassis inspection, body panel removal and installation. Wheels And Tires: Tire maintenance, wheel removal and installation, lug nut torque. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, lubrication points. Troubleshooting: Diagnostic flowcharts for common problems and system malfunctions. Repair: Step-by-step repair instructions for all major components and systems. Rebuilds: Comprehensive procedures for engine and transmission rebuilds. Adjustments: Carburetor adjustment, throttle cable adjustment, brake lever free play. Disassembly Reassembly: Detailed instructions for component removal and reinstallation. Torque Specifications: Precise torque values for all critical fasteners. Technical Depth Depth: Comprehensive, from basic owner maintenance to full engine/transmission rebuilds. Detail Level: Detailed procedures with accompanying pictures. Diagrams: Includes exploded parts diagrams for all major assemblies. 📊 Manual Specifications File Format Type: PDF Version: Optimized for digital use and printing Print Quality Image Clarity: High resolution images for clarity Binding Type Binding For Physical Copy: N/A (Digital PDF format) Paper Type Paper Type For Physical Copy: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, 2-valve, Air-cooled Displacement: 348 cc Bore X Stroke: 83.0 mm x 64.5 mm Compression Ratio: 9.2:1 Performance Horsepower Estimated: Approx. 21 hp @ 6,500 RPM Torque Estimated: Approx. 27.5 Nm @ 5,500 RPM Fuel System Carburetor: Teikei Y28P (or Mikuni VM28 equivalent) Fuel Type: Unleaded gasoline (minimum 87 octane) Fuel Tank Capacity: 13.0 L (3.4 US gal) 🔧 Transmission Standard Type: Automatic (Yamaha Constant Velocity Transmission - YCVT) Gear Selection: Forward (H, L), Neutral, Reverse Features Drive System: Selectable 4WD with automatic front differential lock. Final Drive: Shaft drive (front and rear) 📐 Dimensions Exterior Length: 1995 mm (78.5 in) Width: 1095 mm (43.1 in) Height: 1155 mm (45.5 in) Wheelbase: 1230 mm (48.4 in) Weights Dry Weight: 247 kg (545 lbs) Wet Weight: Approx. 263 kg (580 lbs) Ground Clearance: 250 mm (9.8 in) 🛡️ Safety Features Ratings Atv Safety Standards: Complies with applicable ANSI/SVIA standards. Active Features Braking System: Hydraulic disc brakes front and rear. Engine Braking: Utilizes CVT for engine braking on descents. Passive Features Lighting: Dual 30W headlights, 15W taillight/stoplight. Rollover Protection: N/A (Standard ATV design) 💡 Technology Features Infotainment Features: N/A (Utility ATV focused, no complex infotainment systems). Driver Assistance Features: Selectable 4WD system is the primary driver assistance feature. Connectivity Features: N/A. 🔧 Maintenance Service Intervals Initial Service: Check...