This manual covers the ATV, model code YFM350BAT, for the 2004, 2005, and 2006 model years. Renowned for its reliable air-cooled engine, automatic transmission, and user-friendly 2WD drivetrain, the Bruin 350 is designed for both recreational trail riding and light utility tasks. Its robust engineering and strong heritage in powersports ensure a durable and capable machine, making it a popular choice for riders seeking a balance of comfort, performance, and dependability. This comprehensive service manual provides essential information for the maintenance, repair, and troubleshooting of your ATV. It details procedures for all major systems, including the engine, fuel, ignition, transmission, drivetrain, suspension, brakes, and electrical systems. With step-by-step instructions, clear illustrations, and detailed specifications, this manual is an invaluable resource for owners and technicians alike, ensuring the longevity and optimal performance of your ATV. 🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 2x4 Model Code: YFM350BAT Product Type: ATV Generation Model Years Covered: 2004, 2005, 2006 Codes Chassis Code: YFM350BAT 👋 Introduction Market Position Category: Entry-level to mid-range utility ATV Competitive Analysis Competitors: Honda FourTrax 350, Polaris Sportsman 335/400, Kawasaki Bayou 300/360 Key Features Features: Reliable air-cooled engine, automatic transmission, 2WD drivetrain for maneuverability, comfortable ride for recreational and light utility use Target Audience Demographic: Recreational riders, light farm/ranch use, trail riding enthusiasts Manual Purpose Objective: To empower owners and mechanics with comprehensive information for repair, maintenance, and troubleshooting 📋 Manual Details Coverage Areas Vehicle Model Years: 2004, 2005, 2006 Vehicle Trim Levels: All 2x4 variants Page Count Estimated Pages: Variable (typical for comprehensive workshop manuals can range from 300-800 pages, digital versions may vary) Manual Type Type: Service Manual, Owners Manual, Workshop Manual, Shop Manual, Repair Manual, Factory Manual Language Language: English Format Format: Digital Download (PDF) Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine: Complete overhaul, inspection, troubleshooting, diagnosis, tuning Fuel System: Carburetor (Mikuni BSR33/42), fuel pump, fuel lines, fuel tank, troubleshooting fuel delivery Ignition System: CDI, spark plug, ignition coil, wiring, troubleshooting ignition problems Transmission: Automatic transmission (CVT), drive clutch, driven clutch, belt replacement, lubrication, troubleshooting Drivetrain: Rear drive shaft, differential, final drive, axle shafts, lubrication Suspension: Front and rear suspension systems, shock absorbers, control arms, bearings, adjustments, troubleshooting Brakes: Hydraulic disc brakes (front and rear), brake pads, brake calipers, master cylinders, brake fluid, bleeding, troubleshooting Steering: Handlebar assembly, steering stem, tie rods, steering knuckle, troubleshooting Electrical System: Wiring diagrams, battery, charging system (stator, regulator/rectifier), starter motor, lighting, switches, fuses, troubleshooting electrical faults Cooling System: Air-cooled engine specifications, cooling fins, airflow management Frame And Bodywork: Frame inspection, body panel removal/installation, fenders, seat, racks Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, lubrication points, valve adjustments, spark plug replacement Repair: Complete repair procedures for all major and minor components Troubleshooting: Diagnostic procedures for common and uncommon problems, symptom-based troubleshooting guides Rebuilds: Engine rebuild, carburetor rebuild, transmission overhaul Diagnostics: Detailed diagnostic tests and fault code interpretation (if applicable) Specifications: Torque specifications, clearances, fluid capacities, electrical specifications Technical Depth Depth: Comprehensive (from basic owner maintenance to complete engine and transmission rebuilds) 📊 Manual Specifications File Format Compatibility: All operating systems (Windows, Linux, Mac), readable with any PDF reader Portability: Savable on multiple devices (computer, iPad, hard disk, etc.) Print Quality Printability: Printable without restrictions Binding Type Type: N/A (Digital) Paper Type Type: N/A (Digital) Illustrations Quality: Illustrated with clear step-by-step instructions, zoomable illustrations, exploded views Searchability Feature: Likely searchable text within the PDF (depending on original source) File Size Range: Can be large, up to 5 GB ⚙️ Engine Specifications Primary Engine Type: 4-stroke, SOHC, air-cooled, single-cylinder Displacement: 348cc Bore X Stroke: 83.0 mm x 64.5 mm Compression Ratio: 9.2:1 Carburetor: Mikuni BSR33/42 Performance Horsepower Est: ~20 HP (estimated, actual figures may vary) Torque Est: ~20 lb-ft (estimated, actual figures may vary) Fuel System Fuel Type: Unleaded gasoline Fuel Tank Capacity: 3.7 US gal (14 L) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Lubrication Oil Type: Yamalube 4 (or equivalent SAE 10W-30 API SG or higher) Oil Capacity: 1.80 US qt (1.7 L) (with oil filter replacement) 🔧 Transmission Standard Type: Automatic (Yamaha Constant Velocity Transmission - Y-CVT) with high/low range and reverse Optional Type: N/A Features Drive System: 2WD (Rear Wheel Drive) Final Drive: Shaft drive Lubrication Transmission Oil Type: Yamalube SAE 80 hypoid gear oil Transmission Oil Capacity: 0.16 US qt (0.15 L) 📐 Dimensions Exterior Length: 76.8 in (1950 mm) Width: 43.7 in (1110 mm) Height: 43.1 in (1095 mm) Wheelbase: 49.2 in (1250 mm) Ground Clearance: 10.0 in (254 mm) Weights Dry Weight: 540 lbs (245 kg) Curb Weight: ~562 lbs (255 kg) (estimated) Cargo Front Rack Capacity: 45 kg (99 lbs) Rear Rack Capacity: 85 kg (187 lbs) Towing Towing Capacity: 500 kg (1102 lbs) Tires Front Tire Size: AT25x8-12 Rear Tire Size: AT25x10-12 Wheels Wheel Type: Steel Bolt Pattern:...