🏷️ Basic Information Identification Make: Yamaha Model: Wolverine Sub Model: 4x2 Model Designation: YFM350 Codes Chassis Code: Likely varies by specific year and sub-model, but common designations exist within Yamaha's internal coding. Engine Code: 350cc air-cooled SOHC 4-stroke Generation Model Generation: This manual covers a significant production run, indicating updates and refinements were made across these years. 👋 Introduction Market Position Segment: Entry-level to mid-range utility ATV, known for its reliability and ease of use in recreational and light work applications. Competitive Analysis Competitors: Competed with models such as the Honda FourTrax 300/350, Suzuki QuadRunner 300/350, and Kawasaki Bayou 300/300. Key Features Feature 1: Durable and reliable 348cc air-cooled engine. Feature 2: Comfortable and stable chassis for its class. Feature 3: Automatic transmission for ease of operation. Feature 4: Shaft drive for low maintenance. Manual Value Proposition Value: Provides essential information for maintaining and repairing the Wolverine across a wide range of years, saving owners significant costs compared to dealer service. 📋 Manual Details Coverage Areas Applicable Years: 2003, 2004, 2005, 2006, 2007, 2008, 2009 Coverage Scope: Comprehensive service, repair, and maintenance for the Yamaha Wolverine 350/400 4x2 ATV. Page Count Estimated Page Count: Typically 300-500 pages for a comprehensive factory service manual covering this range of model years. Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, including cylinder head, piston, crankshaft, camshaft, valve train, lubrication system, and cooling system. Fuel System: Carburetor disassembly, cleaning, adjustment, and troubleshooting; fuel pump and lines; fuel tank and filter. Ignition System: CDI unit, ignition coil, spark plug specifications, timing, and troubleshooting. Transmission Drivetrain: Automatic transmission (likely Ultramatic or similar CVT variant for this era), clutch operation, gearbox, drive shafts, differential (if applicable), and wheel hubs. Brakes: Hydraulic brake system (front and rear), brake caliper servicing, master cylinder, brake lines, pads, rotors, and bleeding procedures. Suspension Steering: Front and rear suspension components (shocks, springs, A-arms), steering system (handlebar, tie rods, steering shaft), wheel alignment. Electrical System: Wiring diagrams, battery maintenance, charging system (stator, regulator/rectifier), starter motor, lighting (headlights, taillights, indicators), switches, and fuses. Cooling System: Air cooling system maintenance, fin cleaning, and general inspection. Chassis Frame: Frame inspection, body panel removal and installation, seat, fenders, and luggage racks. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, air filter cleaning/replacement, chain adjustment (if applicable), lubrication points. Troubleshooting: Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides. Repair Procedures: Step-by-step instructions for component disassembly, inspection, repair, and reassembly. Specifications Data: Torque specifications, clearances, fluid capacities, electrical resistance values, and performance data. Wiring Diagrams: Detailed electrical schematics for all systems. Torque Charts: Comprehensive torque value tables for critical fasteners. Technical Depth Depth: Factory-level detail, suitable for professional mechanics and experienced DIY enthusiasts. Covers complete overhauls and complex repairs. 📊 Manual Specifications File Format File Type: PDF Searchability: Typically searchable text within the PDF for quick information retrieval. Print Quality Quality: Professional scan quality, ensuring legibility of diagrams and text. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, 4-stroke, SOHC, air-cooled Displacement: 348 cc Bore X Stroke: Specifications vary slightly by year; typically around 83mm x 64.5mm Compression Ratio: Typically around 8.6:1 Performance Horsepower: Estimated 20-22 HP (varies by year and tuning) Torque: Estimated 20-22 lb-ft (varies by year) Fuel System Carburetor: Mikuni BS30 (or similar 30mm constant velocity carburetor) Fuel Type: Unleaded gasoline, minimum 87 octane Fuel Tank Capacity: Approximately 3.2 gallons (12 liters) Ignition System Ignition Timing: Detailed in manual, typically fixed or adjustable via CDI unit. 🔧 Transmission Standard Transmission Type: Automatic (CVT - Continuously Variable Transmission) with forward, neutral, and reverse. Drive System: Shaft drive to rear wheels. Final Drive Ratio: Specifications vary by year, detailed in manual. Features Clutch Type: Automatic centrifugal clutch. Transmission Fluid Type: Yamaha's recommended gear oil or a suitable ATV-specific transmission fluid. Consult manual for exact specifications (e.g., SAE 10W-30 or 20W-40). 📐 Dimensions Exterior Overall Length: Approx. 73.8 inches (1875 mm) Overall Width: Approx. 41.5 inches (1055 mm) Overall Height: Approx. 43.1 inches (1095 mm) Wheelbase: Approx. 49.2 inches (1250 mm) Weights Dry Weight: Approx. 478 lbs (217 kg) Ground Clearance: Approx. 7.1 inches (180 mm) Cargo Front Rack Capacity: Approx. 45 kg / 99 lbs Rear Rack Capacity: Approx. 65 kg / 143 lbs 🛡️ Safety Features Ratings Atv Classification: Recreational/Utility ATV. Always operate responsibly and wear appropriate safety gear. Active Features Braking System: Hydraulic disc brakes front and rear. Passive Features Lighting: Halogen headlights and taillight. Parking Brake: Mechanical parking brake lever. 💡 Technology Features Infotainment Infotainment System: N/A (Basic utility ATV design for this era). Driver Assistance Driver Assistance Features: N/A Connectivity Connectivity Options: N/A Electrical Tech Starter Type: Electric...