🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 2WD Year: 2004 Product Type: Service Manual 👋 Introduction Market Position Market Segment: Recreational ATV, mid-size utility segment. Competitive Analysis Key Competitors 2004: Honda Rancher 350, Kawasaki Prairie 360, Suzuki Eiger 400, Polaris Sportsman 400/500. Key Features Atv Design Philosophy: Yamaha's reputation for reliability and robust engineering in its off-road vehicles. Target User: Recreational riders, trail riding, light utility work. 📋 Manual Details Coverage Areas Manual Coverage Overview: Comprehensive factory service information for the 2004 Yamaha Bruin 350 2WD ATV. Page Count Estimated Page Count: Approximately 300-400 pages (typical for this era/type of manual) Manual Type Manual Type: Factory Service Manual (FSM) / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine System: Detailed disassembly, assembly, inspection, and repair procedures for the 348cc air-cooled engine. Fuel System: Carburetor service, fuel pump, fuel lines, fuel tank, and filter maintenance. Electrical System: Ignition system, lighting, starting system, charging system (stator, regulator/rectifier), battery, and wiring diagrams. Drivetrain System: Front differential, rear drive axle, driveshafts, and U-joints. Transmission System: Automatic transmission (V-belt type) service, including clutch, variator, and gearcase maintenance. Suspension System: Front and rear suspension components, shock absorbers, control arms, and pivot points. Braking System: Front and rear brake systems (hydraulic disc), brake pad replacement, caliper service, and fluid bleeding. Steering System: Handlebar, steering shaft, tie rods, and knuckle assembly. Cooling System: Air-cooling system specifics for this engine model. Chassis Frame: Frame inspection and repair considerations. Bodywork Plastics: Body panel removal and installation, fender maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, lubrication points, and general inspections. Diagnostic Troubleshooting: Flowcharts and symptom-based troubleshooting guides for common issues. Component Rebuild: Detailed instructions for engine, transmission, carburetor, and brake caliper overhauls. Adjustment Procedures: Carburetor adjustment, idle speed setting, and brake lever/pedal free play. Wiring Diagrams: Complete electrical schematics for all systems. Specifications Data: Torque specifications, clearances, fluid capacities, and diagnostic parameters. Technical Depth Depth Level: Comprehensive, covering everything from basic adjustments to complete engine and transmission rebuilds. 📊 Manual Specifications File Format File Format: PDF Searchable Text: Yes, typically included in factory PDF manuals for easy keyword searching. Print Quality Print Quality: High resolution, suitable for printing all pages. Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) Index Features Index Type: Clickable/Hyperlinked Index ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, air-cooled Engine Displacement: 348cc Bore X Stroke: 83mm x 64.5mm Compression Ratio: 9.2:1 Power Output: Approximately 21-23 HP (estimated, not officially published) Torque Output: Approximately 20-22 lb-ft (estimated) Fuel System Fuel Delivery: Mikuni BSR33 carburetor Fuel Type: Unleaded gasoline (minimum 87 octane recommended) Lubrication System Oil Type: Yamalube 4 (or equivalent SAE 10W-40 or 20W-40 API SG or higher motorcycle oil) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Spark Plug Type: NGK CR6HSA (or equivalent) Cooling System Cooling Method: Forced Air Cooling 🔧 Transmission Standard Transmission Type: Automatic, V-belt transmission (Yamaha Ultramatic® system) Drive System: 2WD (Shaft drive to rear wheels) Features Gear Selection: Forward (H, L), Neutral, Reverse Fluid Specifications Gear Oil Type: Yamalube 4 (or equivalent SAE 10W-40 or 20W-40 API SG or higher motorcycle oil) Gear Oil Capacity: Approximately 0.80 Liters (800 ml) for gearcase 📐 Dimensions Exterior Overall Length: Approx. 74.1 inches (1880 mm) Overall Width: Approx. 41.7 inches (1060 mm) Overall Height: Approx. 43.7 inches (1110 mm) Wheelbase: Approx. 48.8 inches (1240 mm) Ground Clearance: Approx. 6.5 inches (165 mm) Weights Dry Weight: Approx. 478 lbs (217 kg) Fuel Capacity: Approx. 3.2 gallons (12 Liters), including reserve Cargo Front Rack Capacity: Approx. 88 lbs (40 kg) Rear Rack Capacity: Approx. 176 lbs (80 kg) 🛡️ Safety Features Ratings Atv Safety Considerations: Standard ATV safety recommendations apply: wear helmet, eye protection, protective clothing, and follow operational guidelines. Active Features Braking System Type: Hydraulic disc brakes front and rear. Passive Features Handlebars: Ergonomic handlebar design for control. Lighting: Dual 30W headlights, 8W taillight/stoplight. 💡 Technology Features Infotainment Infotainment System: N/A (Basic utility ATV, no integrated infotainment) Driver Assistance Driver Assistance Features: N/A (Basic utility ATV, no electronic driver aids beyond basic operational controls) Connectivity Connectivity Options: N/A 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000 km (1,800 miles) or 6 months, whichever comes first. Gear Oil Change: Every 6,000 km (3,600 miles) or 12 months. Air Filter Cleaning: Every 1,000 km (600 miles) or 3 months, or more frequently in dusty conditions. Spark Plug Replacement: Every 6,000 km (3,600 miles) or 12 months. Vbelt Inspection: Inspect every 1,000 km (600 miles) or 3 months; replace as needed. Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Coolant Type: N/A (Air-cooled engine) Known Issues Common Wear Items: V-belts, brake pads, wheel bearings, and front suspension bushings are typical wear items....