Basic Information Identification Make: Yamaha Model: Bruin 350 4WD / Grizzly 350 4WD Trim Levels: Hunter Model Years Covered: 2007 Codes Vin Decoder Note: VIN decoding specifics typically not in service manuals but implied for identification. Generation Generation Identifier: This manual covers a specific model year for these ATV platforms. Introduction Market Position Target Audience: Yamaha ATV owners seeking to perform maintenance, repairs, and overhauls themselves or for professional technicians. Competitive Analysis Quality Advantage: Highest quality available, computer-generated for superior clarity and zoomability compared to scanned manuals. Key Features Authenticity: Same manual used by Yamaha dealers, ensuring accuracy and completeness. Usability: Easy-to-read, handy reference with comprehensive explanations and clear diagrams. Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and maintenance for 2007 Yamaha Bruin 350 4WD and Grizzly 350 4WD ATVs (Hunter variants included). Secondary Coverage: Overhaul procedures, troubleshooting, technical specifications, and diagnostic information. Page Count Estimated Page Count: Typically 300-500 pages for a full service manual of this nature. Manual Type Manual Type: Official Yamaha Service Repair Maintenance Overhaul Manual Language Language: English Format Format: PDF Download Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, inspection, and repair (e.g., top-end, bottom-end, valve train, cooling system). Fuel System: Carburetor overhaul and adjustment, fuel pump, fuel lines, fuel tank maintenance. Transmission: Automatic transmission (CVT) inspection, repair, belt replacement, drive clutch, driven clutch servicing. Drivetrain: 4WD system operation, front differential, rear differential, drive shafts, U-joints maintenance and repair. Suspension: Front and rear suspension component inspection, repair, and adjustment (shocks, springs, A-arms). Brakes: Front and rear brake system overhaul, pad replacement, caliper service, hydraulic lines, bleeding procedures. Electrical System: Ignition system, starting system, charging system (stator, regulator/rectifier), lighting, battery maintenance, wiring diagrams. Cooling System: Radiator, fan, thermostat, coolant flushing and replacement. Bodywork Chassis: Frame inspection, plastic body panel removal and installation, seat, fenders, racks. Steering: Steering column, tie rods, knuckle assembly inspection and repair. Procedures Included Maintenance: Scheduled maintenance tasks, oil changes, filter replacements, lubrication points, belt checks. Troubleshooting: Diagnostic flowcharts for common problems, symptom-based troubleshooting guides. Repair: Step-by-step repair instructions for all major components and systems. Overhaul: Detailed instructions for complete component rebuilding (e.g., engine, transmission). Inspection: Pre-ride checks, post-ride inspections, and component wear analysis. Assembly Disassembly: Sequential, illustrated procedures for taking apart and reassembling all vehicle systems. Technical Depth Depth Level: Comprehensive (OEM level), suitable for professional mechanics and skilled DIY enthusiasts. Diagnostic Capabilities: Detailed diagnostic procedures, including electrical testing, component testing, and torque specifications. Specifications Data: Includes all necessary torque values, clearances, fluid capacities, and electrical specifications. Manual Specifications File Format Digital Format: PDF Print Quality Image Clarity: High-resolution, computer-generated (not scanned), allowing for unlimited zooming without blur. Text Clarity: Sharp, searchable text for easy navigation and information retrieval. Binding Type Digital Binding: N/A (Digital Download) Paper Type Digital Paper Emulation: Emulates high-quality paper with clear diagrams and text. Features Diagrams Included: Exploded diagrams provided before each disassembly section for clarity. Procedure Format: Sequential, step-by-step formatting for ease of understanding and execution. Engine Specifications Primary Engine Engine Type: 338cc liquid-cooled, 4-stroke, SOHC, 4-valve, single-cylinder (based on typical Yamaha 350cc ATV engines of this era). Bore X Stroke: Likely around 82mm x 64.5mm (specific to Yamaha 350cc single, e.g., Raptor 350). Compression Ratio: Typically around 9.2:1 to 10.5:1 for this class of engine. Performance Horsepower Estimate: Estimated 21-24 HP at peak RPM. Torque Estimate: Estimated 20-23 lb-ft at peak RPM. Fuel System Fuel Delivery: Carburetor (likely Mikuni BSR33 or similar). Fuel Type: Unleaded gasoline Ignition Ignition System: DC-CDI (Digital CDI) with electric start. Lubrication Oil Type: Yamalube 4 20W-40 or equivalent API SG or higher. Cooling System Cooling Method: Liquid-cooled Transmission Standard Transmission Type: Automatic (Continuously Variable Transmission - CVT) with Ultramatic system. Optional Gear Selection: High, Low, Neutral, Reverse. Features Drive Modes: 2WD / 4WD selectable with, likely, a limited-slip front differential. Clutch Type: Dry, centrifugal automatic clutch; V-belt type CVT. Fluid Specifications Cv T Fluid Type: Yamaha Bearings Grease (for specific clutch components) and potentially a specific belt lubricant or no lubricant required for belt. Dimensions Exterior Length: Approx. 76.0 inches (1930 mm) for Bruin 350, Grizzly may vary slightly. Width: Approx. 43.7 inches (1110 mm) for Bruin 350, Grizzly may vary slightly. Height: Approx. 45.0 inches (1145 mm) for Bruin 350, Grizzly may vary slightly. Weights Dry Weight: Approx. 516 lbs (234 kg) for Bruin 350, Grizzly may vary slightly. Ground Clearance: Approx. 10.1 inches (256 mm). Towing Capacity: Typically rated for 1,102 lbs (500 kg). Rack Capacity Front: Approx. 66 lbs (30 kg). Rack Capacity Rear: Approx. 130 lbs (60 kg). Safety Features Ratings Atv Safety Considerations: As an ATV, emphasis on rider skill, protective gear, and adherence to safe operating practices is paramount. Manual covers safety warnings. Active Features Braking System: Hydraulic disc brakes front and rear with engine braking from CVT. Passive Features...