This manual covers the ATVs, model designation YFM350, produced for the model years 2003 through 2009. Renowned for its torquey, air-cooled 348cc engine and reliable shaft drive system, the Wolverine is a capable mid-size utility ATV designed for recreational riders, farmers, and hunters. Its features include a versatile 5-speed manual transmission with reverse, independent front suspension for enhanced comfort and handling, and a durable build suitable for various terrains and light work. The Wolverine's design philosophy emphasizes robust construction and ease of maintenance, making it a dependable choice in its class. This comprehensive service and workshop manual provides detailed guidance for owners and technicians. It covers all essential aspects of maintenance, repair, and troubleshooting for the 350/400. Key areas include in-depth engine mechanics, fuel and ignition system service, transmission and drivetrain maintenance, suspension and steering adjustments, brake system overhauls, and electrical system diagnostics. The manual also includes routine maintenance schedules, detailed specifications, torque values, clearances, and clear wiring diagrams, empowering users to maintain their vehicle for optimal performance and longevity. 🏷️ Basic Information Identification Make: Yamaha Model: Wolverine 350/400 Model Designation: YFM350 Product Type: ATV Service Repair Manual Codes Product Code: N/A (Digital Download) 👋 Introduction Market Position Vehicle Segment: Mid-size utility ATV, known for its reliable air-cooled engine and go-anywhere capability. Target Audience: Recreational riders, farmers, ranchers, and hunters seeking a robust and capable ATV. Competitive Analysis Key Competitors: Honda FourTrax 300/350, Suzuki QuadRunner 300, Kawasaki Bayou 300/300E. Key Features Engine Type: Torquey, air-cooled, single-cylinder engine providing consistent power delivery. Drivetrain: Reliable shaft drive system, reducing maintenance compared to chain drives. Transmission: Versatile 5-speed manual with reverse, offering good control and gearing options. Suspension: Independent front suspension for improved ride comfort and handling, with a rear swingarm. Utility: Durable build, capable of handling various terrains and carrying loads. Manual Value Proposition Cost Savings: Enables DIY maintenance and repairs, significantly reducing professional service costs. Empowerment: Empowers owners to understand and maintain their vehicle for optimal performance and longevity. 📋 Manual Details Coverage Areas Model Years Covered: 2003, 2004, 2005, 2006, 2007, 2008, 2009 Specific Models Covered: Wolverine 350 (YFM350FX), Wolverine 400 (may refer to a regional variant or later iteration of the 350, manual covers models based on the YFM350 platform within the specified years) Page Count Estimated Page Count: Extensive (typical for full service manuals, likely 300-500+ pages) Manual Type Manual Type: Service/Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanics: Detailed overhaul, assembly, disassembly, component inspection, and replacement for the air-cooled 348cc engine. Fuel System: Carburetor (Mikuni BSR33) tuning, cleaning, rebuilding, fuel pump, fuel lines, and fuel tank maintenance. Ignition System: CDI unit, ignition coil, spark plug specifications, testing, and troubleshooting. Lubrication System: Oil pump, oil filter, oil passages, oil change procedures, and oil specifications. Cooling System: Air-cooling system description, heat dissipation principles, and related components. Transmission: 5-speed manual with reverse, clutch operation, adjustment, replacement, gearbox disassembly, inspection, and lubrication. Drivetrain: Shaft drive system, differential, driveshafts, U-joints, inspection, maintenance, and lubrication. Suspension System: Independent front suspension (A-arms), rear swingarm, shock absorbers, springs, adjustment, maintenance, and component wear. Braking System: Hydraulic disc brakes (front and rear), brake fluid specifications, bleeding procedures, caliper service, pad replacement, and rotor inspection. Steering System: Handlebar, steering shaft, tie rods, steering knuckles, adjustment, lubrication, and component wear. Electrical System: Wiring diagrams, battery specifications, charging system (stator, regulator/rectifier), lighting system, starter motor, and electrical component testing. Bodywork Chassis: Frame inspection, body panel removal/installation, fenders, seat, handlebars, and general assembly. Wheels Tires: Tire pressure, sizing, wheel specifications, and bearing maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment (if applicable to specific variant), tire pressure checks, spark plug service, and general inspection. Troubleshooting Diagnostics: Step-by-step diagnostic procedures for common problems related to engine performance, electrical issues, starting problems, and drivetrain issues. Engine Repair: Complete engine rebuilds, piston and ring replacement, valve adjustments, cylinder head service, crankshaft and connecting rod inspection/replacement. Transmission Repair: Gearbox disassembly, clutch replacement, shift mechanism repair, and bearing services. Electrical Diagnostics: Using multimeter for voltage, resistance, and continuity testing, troubleshooting charging system, ignition, and starting circuits. Suspension And Steering Service: Shock absorber servicing, bearing replacement, steering linkage adjustment, and component greasing. Brake System Service: Brake bleeding, caliper overhaul, pad and rotor replacement, and troubleshooting hydraulic system issues. Carburetor Rebuilding: Complete instructions for disassembling, cleaning, reassembling, and tuning the Mikuni carburetor. Technical Depth Depth Of Information: Comprehensive (covers from basic maintenance to complete engine and component overhauls, including detailed specifications and diagnostic charts). Diagnostic Charts: Included for systematic troubleshooting of various issues. Wiring Diagrams: Detailed and clearly laid out electrical wiring diagrams for easy reference. Torque Specifications: Essential torque values for all critical fasteners and components. Clearances And Tolerances: Specific measurements for engine parts, bearings, and other wear items. 📊 Manual Specifications File Format File...