🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 4WD Year: 2004 Vehicle Type: All-Terrain Vehicle (ATV) Codes Oem Manual Code: Obtained from factory documentation 👋 Introduction Market Position Segment: Entry-level to mid-range utility ATV segment. Target Audience: Recreational riders, farmers, and light-duty utility users. Competitive Analysis Key Competitors: Honda FourTrax 350, Suzuki Eiger 400, Polaris Sportsman 400. Key Features Feature 1: Reliable 348cc air-cooled engine known for its durability. Feature 2: Selectable 2WD/4WD system for versatile traction control. Feature 3: Independent front suspension (IFS) for improved ride comfort and handling. Feature 4: Automatic centrifugal clutch with V-belt transmission for ease of operation. 📋 Manual Details Coverage Areas Systems Covered: Engine, Transmission, Drivetrain (4WD), Suspension, Steering, Brakes, Electrical System, Fuel System, Cooling System, Chassis, Bodywork, Maintenance, Troubleshooting, Diagnostics Page Count Estimated Page Count: 300+ Manual Type Type: Factory Service Manual (FSM) Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine System: Detailed breakdown of the 348cc air-cooled engine, including cylinder head, valve train, piston, crankshaft, lubrication system, and timing components. Drivetrain System: Comprehensive coverage of the 2WD/4WD engagement system, front differential, rear differential, drive shafts, and U-joints. Electrical System: Wiring diagrams, ignition system, lighting, charging system (stator, regulator/rectifier), starter motor, battery maintenance, and troubleshooting for electrical faults. Procedures Included Maintenance Procedures: Scheduled maintenance intervals, oil changes, filter replacements, spark plug service, air filter cleaning/replacement, brake fluid flush, coolant checks, lubrication points. Troubleshooting Guides: Systematic diagnostic charts and procedures for identifying and resolving common issues, including starting problems, engine performance issues, electrical faults, and drivetrain malfunctions. Repair Procedures: Step-by-step instructions for disassembly, inspection, repair, and reassembly of all major vehicle components, including engine rebuilds, transmission overhaul, suspension component replacement, and brake system servicing. Technical Depth Diagnostic Capability: Advanced diagnostic procedures, including specifications for ignition timing, fuel mixture analysis, and electrical system testing using multimeters and specialized tools. Rebuild Capability: Complete engine and transmission rebuild procedures, including torque specifications, critical clearances, and component tolerances for ensuring proper assembly and longevity. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text enabled for quick information retrieval. Print Quality Resolution: High-resolution scans ensuring clarity of diagrams and text. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, air-cooled Displacement: 348cc Bore X Stroke: 83mm x 64.5mm Compression Ratio: 9.2:1 Performance Horsepower Rating Approx: 19.7 HP @ 6500 RPM (Estimate based on similar models) Torque Rating Approx: 20.1 lb-ft @ 5500 RPM (Estimate based on similar models) Fuel System Fuel Delivery: Mikuni BSR33 carburetor Fuel Type: Unleaded gasoline, 87 octane minimum Fuel Tank Capacity: 3.2 gal (12 L) 🔧 Transmission Standard Type: Automatic (Yamaha Ultramatic® Transmission - CVT) Drive System: Shaft Drive Features Gear Reduction: High/Low range with reverse Engine Braking: Utilizes centrifugal clutch and V-belt for effective engine braking. Fluid Specifications Transmission Oil Type: Yamalube 4 (or equivalent 20W-40 API SG or higher) Transmission Oil Capacity: Approx. 1.6 L (1.7 US qt) for engine oil, including filter 📐 Dimensions Exterior Length: 76.4 in (1940mm) Width: 42.7 in (1085mm) Height: 45.7 in (1160mm) Wheelbase: 49.2 in (1250mm) Cargo Front Rack Capacity: 88 lbs (40 kg) Rear Rack Capacity: 176 lbs (80 kg) Weights Dry Weight: 540 lbs (245 kg) Ground Clearance: 10.4 in (264mm) 🛡️ Safety Features Ratings Atv Safety Standards: Compliant with ANSI/SVIA standards Active Features Braking System: Hydraulic disc brakes front and rear. Parking Brake: Parking brake lever integrated with rear brake caliper. Passive Features Lighting: Dual 30W halogen headlights, 5/21W taillight/brake light. Operator Safety: Thumb throttle for controlled acceleration, handlebar grips for secure control. 💡 Technology Features Infotainment Display: Digital LCD meter displaying speedometer, odometer, tripmeter, clock, 4WD indicator, neutral/reverse indicator. Driver Assistance Traction Control: Selectable 2WD/4WD system allows the operator to choose the appropriate traction for the terrain. Connectivity Charging Port: Optional accessory charging port may be available, check specific model configuration. 🔧 Maintenance Service Intervals Engine Oil Change: Every 1000 km (600 miles) or 6 months, whichever comes first. First service at 100 km (60 miles) or 1 month. Air Filter Check: Every 200 km (120 miles) or 1 month. Clean/replace as needed, more frequently in dusty conditions. Spark Plug Replacement: Every 5000 km (3000 miles) or 2 years. Check gap every 1000 km (600 miles). Fluid Specifications Engine Oil Specification: Yamalube 4 (20W-40) API SG or higher. Coolant Type: Permanent type antifreeze/coolant (ethylene glycol based) with a 50/50 mix of water. Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Known Issues Common Wear Item: V-belt in CVT transmission can wear over time and require replacement. Check for signs of fraying or glazing. Potential Problem 1: Carburetor can become gummed up if fuel sits for extended periods. Fuel stabilizer recommended for storage. Potential Problem 2: 4WD engagement system components (actuator, hub...