The Grizzly 350, model designation YFM350FW (4WD), represents a robust and reliable mid-size utility all-terrain vehicle, produced for the 2012 and 2013 model years. Renowned for its ruggedness and capable 4WD system, this ATV is well-suited for recreational trail riding, light agricultural tasks, and hunting expeditions. Key features include a proven air-cooled engine, the dependable automatic transmission, a sturdy chassis, and a limited-slip front differential for enhanced traction. Its engineering prioritizes durability and practicality, building on an extensive legacy in ATV manufacturing, making it a popular choice for demanding environments. This comprehensive Service and Repair Workshop Manual provides in-depth guidance for maintaining and repairing the Grizzly 350 (YFM350FW) for the 2012 and 2013 model years. It covers all essential systems, including detailed procedures for engine overhaul, fuel system servicing, cooling system maintenance, transmission and drivetrain repair, suspension and brake system work, and electrical system diagnostics. The manual also includes routine maintenance schedules, troubleshooting guides for common issues, and critical technical specifications such as torque values and fluid types. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their Grizzly 350. 🏷️ Basic Information Identification Make: Yamaha Model: Grizzly 350 Model Designation: YFM350FW (4WD) Product Type: Service Repair Workshop Manual 👋 Introduction Market Position Product Segment: Mid-size utility ATV, known for its ruggedness, reliability, and 4WD capability, making it popular for recreational trail riding, light farming, and hunting. Competitive Analysis Key Competitors: Honda FourTrax 350/420, Suzuki KingQuad 300/400, Kawasaki Brute Force 300/400, Polaris Sportsman 400/500. Key Features Vehicle Highlights: Proven air-cooled engine, reliable automatic transmission (Ultramatic), sturdy chassis, 4WD with limited-slip front differential, comfortable seating, and practical cargo racks. 📋 Manual Details Coverage Areas Covered Years: 2012, 2013 Page Count Estimated Pages: Hundreds (typical for a comprehensive workshop manual) Manual Type Manual Format Type: Service and Repair Workshop Manual Language Language: English Format Delivery Format: Digital (typically PDF, but may vary) 📖 Manual Coverage Systems Covered Engine: Complete disassembly, inspection, repair, and reassembly of the engine, including top-end (cylinder head, piston, valves), bottom-end (crankshaft, connecting rod, bearings), and lubrication system. Fuel System: Carburetor (Mikuni BSR33), fuel pump, fuel lines, fuel tank, and associated components. Includes adjustments, cleaning, and troubleshooting. Cooling System: Radiator, fan, coolant hoses, thermostat, and water pump. Includes maintenance, flushing, and component testing. Transmission Drivetrain: Automatic transmission (CVT - Ultramatic), drive shaft, differential gears (front and rear), wheel hubs, and CV joints. Includes fluid changes, inspection, and repair procedures. Suspension: Front independent double A-arm suspension, rear swingarm suspension. Includes shock absorbers, springs, bushings, ball joints, and steering components. Torque specifications for all fasteners. Brakes: Hydraulic disc brakes (front and rear), brake lines, master cylinders, calipers, and brake pads. Includes bleeding procedures, pad replacement, and rotor inspection. Electrical System: Ignition system (CDI), starter motor, battery, charging system (stator, rectifier/regulator), lighting, and wiring harness. Includes wiring diagrams, troubleshooting guides, and component testing. Chassis Frame: Frame inspection, welding repairs (if applicable), and alignment checks. Bodywork Trim: Fenders, racks, seat, handlebars, and plastic body panels. Removal, installation, and minor repair guidance. Procedures Included Routine Maintenance: Oil changes, filter replacements (oil, air), spark plug checks/replacement, chain/belt adjustments, lubrication points, tire pressure checks. Troubleshooting: Diagnostic procedures for common issues such as starting problems, poor performance, electrical faults, and braking issues, often presented with symptom-cause-remedy tables. Component Overhaul: Detailed step-by-step instructions for rebuilding major components like the engine, transmission, and carburetor. Specifications: All critical torque values, clearances, fluid capacities, and electrical resistance values required for accurate assembly and diagnostics. Special Tools: Identification and usage of specialized tools recommended or required for specific repair procedures. Technical Depth Depth: Comprehensive. Designed for professional mechanics and advanced DIY enthusiasts, covering everything from basic fluid changes to full engine and transmission rebuilds. 📊 Manual Specifications File Format File Type: Likely PDF for digital delivery, ensuring searchability and easy navigation. May also be available in print. Print Quality Print Resolution: High-resolution scans or native digital files ensure clear diagrams and text. (Assumed for professional manual). Binding Type Binding: N/A (for digital). If printed, typically comb or spiral binding for lay-flat use in a workshop environment. Paper Type Paper Quality: N/A (for digital). If printed, often on durable, coated paper to withstand workshop conditions. ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC, air-cooled Displacement: 348 cc (21.2 cu. in.) Bore X Stroke: 83.0 mm x 64.5 mm (3.27 in x 2.54 in) Compression Ratio: 9.2:1 Performance Horsepower Est: Approx. 20-22 HP (at flywheel, may vary slightly by region/tuning) Torque Est: Approx. 27-29 Nm (at flywheel, may vary slightly) Fuel System Carburetor Model: Mikuni BSR33, single Fuel Type: Unleaded gasoline, 87 octane (minimum) Ignition Ignition System: CDI (Capacitor Discharge Ignition) Lubrication Oil Type: Yamalube 4 (or equivalent) SAE 10W-40, API Service SG or higher Oil Capacity W Filter: Approx. 1.8 L (1.9 US...