This manual covers the ATV, model variant YFM350, produced between 2004 and 2006. As part of the first generation line, this mid-size utility ATV is recognized for its torque-rich 348cc air-cooled engine, comfortable seating, and reliable 4x2 drivetrain, complemented by independent front suspension and electric start. Engineered for recreational riding and light-to-moderate work, the 350 offers a blend of capability and comfort, positioning it as a strong contender in its market segment. Its robust design and ATV legacy contribute to its reputation for reliability and performance. This comprehensive 2-manual set, consisting of an Owner's Manual and a Factory Service/Repair/Workshop Manual, provides in-depth information for maintaining and repairing your 350 4x2. It covers all essential systems, including the engine, transmission, fuel, electrical, brakes, suspension, steering, chassis, and bodywork. Detailed procedures for routine maintenance, complex repairs, and troubleshooting common issues are included, along with critical technical specifications and clear, high-resolution diagrams and wiring schematics. This resource is designed to empower owners and technicians alike to ensure the optimal performance and longevity of the vehicle. 🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 4x2 Model Variant: YFM350 Product Name: Yamaha Bruin 350 4x2 ATV (2 Manual Set) 2004-2006 Owners & Factory Service Repair Workshop Manual Download PDF Generation Generation Identifier: First Generation Bruin 350 Codes Chassis Code: Likely YFM350ER Engine Code: Likely 350cc air-cooled, 4-stroke, SOHC, 2-valve 👋 Introduction Market Position Atv Segment: Mid-size utility ATV, positioned for recreational riding and light-to-moderate work. Competitive Analysis Key Competitors: Honda FourTrax 350, Polaris Sportsman 400/500, Kawasaki Bayou 300/300. Key Features Vehicle Highlights: Torque-rich engine, comfortable seating, reliable 4x2 drivetrain, independent front suspension, electric start. Manual Value Proposition Manual Benefit: Enables owners and technicians to perform all necessary maintenance and repairs, saving time and money. Delivery Advantage: Instant download upon payment, allowing immediate access to repair information. 📋 Manual Details Coverage Areas Covered Model Years: 2004, 2005, 2006 Covered Engine Types: All engine types for the specified years (primarily the 350cc 4-stroke) Page Count Estimated Page Count: Likely 500+ pages combined for both manuals (Owner's and Service/Repair) Manual Type Manual Type: 2-Manual Set: Owner's Manual & Factory Service/Repair/Workshop Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, tuning, diagnostics, carburetor, lubrication, cooling system. Transmission: Automatic transmission (likely Ultramatic), clutch, drive shafts, differentials. Fuel System: Carburetor (Mikuni BSR33), fuel pump, fuel lines, fuel tank. Electrical System: Ignition system, battery, charging system (stator, regulator/rectifier), lighting, starter motor, wiring diagrams. Brakes: Front and rear hydraulic disc brakes, brake fluid, calipers, master cylinder, lines. Suspension: Front independent suspension (A-arms), rear swingarm, shock absorbers, springs. Steering: Handlebar steering system, tie rods, steering column. Chassis Frame: Frame inspection, welds, mounting points. Bodywork: Fenders, body panels, seat, racks, headlights, taillights. Procedures Included Maintenance: Oil changes, filter replacements, spark plug checks, chain/belt adjustments (if applicable), battery maintenance, tire pressure checks, general inspection. Repair: Engine rebuild, transmission overhaul, brake caliper replacement, carburetor tuning/rebuild, suspension component replacement, electrical component troubleshooting and repair. Troubleshooting: Diagnostic charts for common problems, electrical system diagnostics, engine performance issues. Technical Specifications: Torque specifications for all fasteners, engine timing, valve clearances, fluid capacities and types. Technical Depth Depth Of Coverage: Comprehensive A-Z coverage, suitable for both novice DIY mechanics and experienced technicians. Diagnostic Capabilities: Includes detailed diagnostic procedures and troubleshooting guides for identifying and resolving issues. Visual Aids: Step-by-step instructions with clear pictures and detailed wiring diagrams. 📊 Manual Specifications File Format File Type: PDF Compatibility: Works on any PC/MAC computer, Win/MAC/Linux compatible. Print Quality Image Resolution: High-resolution images and diagrams suitable for printing. Binding Type Binding: Digital download - no physical binding. Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, SOHC, 2-valve Displacement: 348cc Bore X Stroke: 83.0 mm x 64.5 mm Compression Ratio: 9.2:1 Performance Horsepower Estimate: Approximately 20-22 HP (estimated, actual figures not always published for ATVs) Torque Estimate: Approximately 25-28 lb-ft (estimated) Fuel System Carburetor Model: Mikuni BSR33 Fuel Delivery: Carbureted, electric fuel pump Ignition Ignition System: CDI (Capacitor Discharge Ignition) Lubrication Oil Type: Yamalube 4 (or equivalent API SG, SAE 20W-40) - specific manual to confirm. Cooling System Cooling Method: Air-cooled 🔧 Transmission Standard Transmission Type: Automatic (Yamaha Ultramatic®) Drive System: Shaft Drive, 4x2 Features Gear Selection: High, Low, Neutral, Reverse Clutch: Automatic centrifugal clutch Fluid Specifications Transmission Oil Type: Yamaha Gear Oil (or equivalent SAE 80 hypoid gear oil) - specific manual to confirm. 📐 Dimensions Exterior Overall Length: Approx. 74.6 inches (1895 mm) Overall Width: Approx. 43.7 inches (1110 mm) Overall Height: Approx. 43.3 inches (1100 mm) Weights Dry Weight: Approx. 512 lbs (232 kg) Cargo Front Rack Capacity: Approx. 88 lbs (40 kg) Rear Rack Capacity: Approx. 176 lbs (80 kg) Tires Front Tire Size: AT25 x 8-12 Rear Tire Size: AT25 x 10-12 Wheels Wheel...