The Yamaha YFM Wolverine 350, produced in 1999, is a capable All-Terrain Vehicle (ATV) recognized for its robust 348cc air-cooled engine and reliable 2WD shaft drive system. Positioned as a recreational and utility vehicle, it was designed for trail riding and general use, competing with other established brands in its segment. Key features include its torquey performance, comfortable riding position, and durable engineering, reflecting a strong heritage in powersports. The YFM Wolverine 350, chassis code YFM350XF, offers a 5-speed transmission with an automatic clutch and reverse, making it a versatile machine for various terrains. This Service Repair Manual provides comprehensive guidance for maintaining and repairing the 1999 Yamaha YFM Wolverine 350. It covers all essential systems, including the engine, carburetion, electrical components, chassis, and drivetrain. Detailed procedures for scheduled maintenance, troubleshooting, component overhaul, and technical specifications are included. The manual aims to assist owners, technicians, and mechanics in ensuring the optimal performance and longevity of the vehicle through clear, step-by-step instructions and diagnostic information. 🏷️ Basic Information Identification Make: Yamaha Model: YFM Wolverine 350 Year: 1999 Vehicle Type: All-Terrain Vehicle (ATV) Codes Chassis Code: YFM350XF 👋 Introduction Market Position Positioning: The Yamaha YFM Wolverine 350 was positioned as a capable and reliable recreational ATV for trail riding and general utility use. Competitive Analysis Competitors: Competed with models from Honda (e.g., FourTrax 300/350), Suzuki (e.g., QuadSport 300), and Kawasaki (e.g., Bayou 300). Key Features Features: Known for its torquey 2WD operation, robust engine, and comfortable riding position, making it a popular choice for its era. 📋 Manual Details Coverage Areas Manual Type: Factory Service Repair Manual Language: English Format: PDF Download Printable: Yes Compatibility: WINDOWS and MAC Requirements: Adobe PDF Reader 📖 Manual Coverage Systems Covered Engine: Complete overhaul, diagnosis, tuning, lubrication, cooling system. Carburetion: Detailed explanation of carburetor operation, adjustment, cleaning, and overhaul. Electrical: Wiring diagrams, ignition system, lighting, battery, starter, charging system, troubleshooting. Chassis: Suspension (front and rear), steering, frame, wheels, tires, brakes. Drivetrain: Final drive, driveshaft, differential (if applicable), clutch, gearbox. Bodywork: Body panels, fenders, seating, handlebars, controls. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, lubrication, valve adjustments. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues. Repair: Step-by-step instructions for engine rebuilds, component replacement, and adjustments. Inspection: Periodic inspection points and procedures for wear and tear. Technical Depth Depth: Comprehensive, covering from basic adjustments to complete engine and transmission overhauls. Diagnostics: Detailed diagnostic trees and troubleshooting charts. Specifications: Inclusion of all critical torque values, clearances, fluid types, and electrical specifications. 📊 Manual Specifications File Format Format: PDF Searchability: Likely text-searchable PDF for efficient information retrieval. Print Quality Quality: Digital format allows for high-resolution printing of all diagrams and text. Binding Type Binding: Not applicable (Digital download) Paper Type Paper: Not applicable (Digital download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, air-cooled Displacement: 348cc Bore X Stroke: 83.0 mm x 64.5 mm Compression Ratio: 9.2:1 Performance Horsepower: Approx. 20 HP (estimated) Torque: Not explicitly stated in product info, but known for good low-end torque. Fuel System Carburetor: Mikuni BSW34 Fuel Type: Unleaded gasoline Ignition Ignition System: CDI (Capacitor Discharge Ignition) Lubrication Oil Type: Yamaha Motorcycle Oil API SG or similar (Manual will specify exact grade and capacity). Cooling Cooling System: Air-cooled 🔧 Transmission Standard Transmission Type: 5-speed constant mesh with automatic clutch and reverse Optional Optional Transmission: N/A Features Clutch: Automatic centrifugal clutch Drive Type: 2WD (Rear Wheel Drive) Final Drive: Shaft drive with sealed chain final drive 📐 Dimensions Exterior Length: Approx. 73.2 in (1860 mm) Width: Approx. 43.3 in (1100 mm) Height: Approx. 42.1 in (1070 mm) Wheelbase: Approx. 49.2 in (1250 mm) Weights Dry Weight: Approx. 463 lbs (210 kg) Fuel Capacity: 3.3 gal (12.5 L), including 0.7 gal reserve Tires Front Tire Size: AT22x8-10 Rear Tire Size: AT22x10-10 🛡️ Safety Features Ratings Safety Ratings: N/A (ATVs are not typically rated by NHTSA or IIHS in the same way as passenger vehicles). Active Features Braking System: Hydraulic disc brakes (front and rear). Passive Features Lighting: Dual 30W headlights, 5W brake/taillight. 💡 Technology Features Infotainment Infotainment System: N/A (Basic recreational ATV of its era, no advanced infotainment features). Driver Assistance Driver Assistance: N/A Connectivity Connectivity: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific interval (typically every 1000-2000 miles or annual service). Air Filter Cleaning: Frequent checks and cleaning recommended, especially in dusty conditions (detailed in manual). Spark Plug Replacement: Refer to manual for interval and correct spark plug type (e.g., NGK CR9E or equivalent). Valve Adjustment: Recommended at specified mileage/hour intervals (detailed in manual). Fluid Specifications Engine Oil Grade: Yamaha Genuine Yamalube or API SG, SAE 10W-40 (verify in manual). Brake Fluid Type: DOT 3 or DOT 4 (verify in manual). Gear Oil: Specific gear oil type for final drive and transmission (verify in manual). Known Issues...