Welcome to the comprehensive service manual for the Bruin 350 All-Terrain Vehicle (ATV), covering production years 2003 through 2008. This ATV, powered by a robust 348cc engine and featuring a reliable automatic Continuously Variable Transmission (CVT) with selectable 2WD/4WD, is engineered for exceptional performance and durability across various terrains. Known for its strong heritage of reliability and trail-worthiness, the Bruin 350 offers a balance of power and control, making it a capable choice for both work and recreation. Its design emphasizes ease of operation and dependable service, reflecting a commitment to quality in their off-road vehicle lineup. This manual provides factory-level detail for the complete service, repair, maintenance, and troubleshooting of your Bruin 350. It encompasses all essential systems, including detailed engine diagnosis and rebuild procedures, fuel system maintenance, clutch and CVT service, final drive and 4WD system repairs, braking system overhauls, and electrical system diagnostics with comprehensive wiring diagrams. Additionally, you will find step-by-step instructions for preventative maintenance, component disassembly and reassembly with precise torque specifications, and clear troubleshooting guides. This resource is designed to empower DIY owners and professional technicians alike, ensuring optimal performance and longevity for your ATV. 🏷️ Basic Information Identification Make: Yamaha Model: Bruin 350 Vehicle Type: All-Terrain Vehicle (ATV) Production Years Covered: 2003, 2004, 2005, 2006, 2007, 2008 Codes Engine Code Indication: YFM350 👋 Introduction Market Position Target Audience: DIY owners, professional mechanics, service workshops Competitive Analysis Value Proposition: Cost savings through DIY repairs, access to factory-level information Key Features Authenticity: Original Yamaha factory manual Delivery Method: Instant digital download Support: Free support available for download issues 📋 Manual Details Coverage Areas Manual Coverage Scope: Comprehensive Service, Repair, Maintenance, and Troubleshooting Page Count Estimated Page Count: Detailed (Exact number not specified, but described as comprehensive) Manual Type Type: Factory Service Manual / Workshop Manual / Repair Guide Language Language: English Format Digital Format: PDF (potentially zipped .zip, .rar, or .exe) 📖 Manual Coverage Systems Covered Engine Service: Complete engine diagnosis, disassembly, inspection, and reassembly Fuel System: Carburetion (including jetting, float adjustment) or EFI system diagnosis and repair Clutching And Belt System: Variator (CVT) inspection, belt replacement, clutch service Final Drive And 4Wd System: Driveshaft, differential, axle inspection and repair, 4WD system engagement and service Transmission: Gearbox inspection, maintenance, and repair Brakes: Brake system inspection, hydraulic system bleeding, pad and rotor replacement, caliper service Electrical System: Battery, charging system, ignition system, lighting, starter system diagnosis and repair Wiring Diagrams: Comprehensive electrical schematics for all circuits Body And Steering: Frame inspection, body panel removal/installation, steering system components, alignment Procedures Included Preventative Maintenance: Detailed schedules and procedures for oil changes, filter replacements, lubrication, and inspections Troubleshooting Guides: Step-by-step diagnostic procedures for common and uncommon issues Rebuild Procedures: Complete instructions for engine, transmission, and other major component rebuilds Component Disassembly Reassembly: Detailed instructions with torque specifications for all major and minor components Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIYers Illustrations: Clear, step-by-step illustrated instructions with diagrams and exploded views 📊 Manual Specifications File Format Compatibility: Compatible with all operating systems (Windows 97-10, MAC), PC and MAC compatible Accessibility: Readable with any PDF reader Restrictions: No restrictions on printing or saving/burning to disc Print Quality Printability: Printable from any computer and printer Zoomability: Zoomable illustrations for detailed viewing Binding Type Binding: Digital Download (Not a physical binding) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, Air-cooled Displacement: 348cc Bore X Stroke: 83.0 mm x 64.5 mm (Typical for this engine family) Compression Ratio: 9.2:1 (Typical) Performance Horsepower Estimate: Approximately 20-22 HP (Chassis Dyno estimate, varies by model year and tuning) Torque Estimate: Approximately 20-22 lb-ft (Chassis Dyno estimate) Fuel System Fuel Delivery: Carburetor (Mikuni BSR33) or Electronic Fuel Injection (EFI) depending on specific model variant/year Carburetor Size: 33mm (If carbureted) Fuel Type: Unleaded gasoline, minimum 87 octane 🔧 Transmission Standard Transmission Type: Automatic Continuously Variable Transmission (CVT) with High/Low range and Reverse Optional Gearbox: N/A (CVT is standard) Features Drive System: Shaft Drive, 2WD/4WD selectable Final Drive Ratio: Specific ratio varies, typically around 3.8:1 for rear differential Transmission Fluid Type: Yamaha's recommended ATV gear oil (e.g., Yamalube Gear Oil) 📐 Dimensions Exterior Length: Approx. 74.4 in (1890 mm) Width: Approx. 40.2 in (1020 mm) Height: Approx. 44.7 in (1135 mm) Wheelbase: Approx. 48.2 in (1225 mm) Ground Clearance: Approx. 6.3 in (160 mm) Weights Dry Weight: Approx. 573 lbs (260 kg) Curb Weight: Approx. 600+ lbs (depending on fluids) Cargo Front Rack Capacity: Approx. 110 lbs (50 kg) Rear Rack Capacity: Approx. 198 lbs (90 kg) 🛡️ Safety Features Ratings Atv Safety Standards: Compliant with ANSI/SVIA 1-2010 and 2-2010 (as applicable to the era of production) Active Features Braking System: Hydraulic disc brakes front and rear Passive Features Lighting: Halogen headlights, brake light/taillight Tires: ATV-specific knobby...