The Yamaha YFZ350, affectionately known as the Banshee, is a high-performance Sport ATV that defined an era of off-road recreation from 1987 through 2003. Renowned for its explosive power delivery, stemming from a potent liquid-cooled, two-stroke, parallel-twin cylinder engine, the Banshee offers an exhilarating riding experience. Its engineering quality and reliability are hallmarks of a legacy in producing durable and capable off-road vehicles, making it a sought-after machine for enthusiasts who demand top-tier performance and a thrilling ride. This comprehensive service repair manual provides detailed guidance for the YFZ350 (1987-2003). It covers essential maintenance procedures, routine service checks, and in-depth repair instructions for all major systems, including the engine, fuel, ignition, cooling, transmission, drivetrain, suspension, brakes, and electrical systems. The manual also includes troubleshooting guides, diagnostic procedures, and technical specifications, making it an invaluable resource for owners and technicians alike to ensure the optimal performance, longevity, and safe operation of this iconic Sport ATV. 🏷️ Basic Information Identification Make: Yamaha Model: YFZ350 Model Nickname: Banshee Product Name: Yamaha YFZ350 1987-2003 Full Service Repair Manual PDF Download Codes Chassis Code: 3YU Engine Code Prefix: 3YU 👋 Introduction Market Position Category: Performance Sport ATV Target Audience: Enthusiasts seeking high-performance off-road recreation Competitive Analysis Key Competitors Era: Polaris Predator, Suzuki LT250R, Kawasaki KXT250 (Tecate) Key Features Engine Configuration: High-performance, liquid-cooled, two-stroke, parallel-twin cylinder Performance Characteristics: Renowned for its explosive power delivery and top-end speed Manual Benefit: Essential for maintaining peak performance and longevity of a complex machine 📋 Manual Details Coverage Areas Covered Years: 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Vehicle Type: Sport ATV Page Count Estimated Page Count: High (Detailed Service Manual typically exceeds 300 pages, exact count not specified) Manual Type Manual Type: Full Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, disassembly, assembly, inspection, tuning, performance modifications Fuel System: Carburetor identification, adjustment, cleaning, rebuilding, fuel pump, fuel lines Ignition System: CDI, ignition timing, stator, coil, spark plug specifications Cooling System: Liquid cooling system, radiator, hoses, water pump, coolant type and capacity Transmission: Clutch operation, gearbox disassembly and assembly, gear ratios, lubrication Drivetrain: Chain adjustment, sprocket inspection, rear axle assembly Suspension: Front and rear suspension component inspection, adjustment, replacement, shock absorber specifications Brakes: Hydraulic brake system diagnosis, pad replacement, caliper service, master cylinder, brake fluid specifications Electrical System: Wiring diagrams, lighting, battery, starter, charging system, troubleshooting electrical faults Frame And Bodywork: Chassis inspection, repair, plastics, seat, handlebar components Troubleshooting: Common problems, diagnostic charts, fault finding procedures Procedures Included Preventive Maintenance: Regular service checks, lubrication, fluid changes, filter replacements Routine Maintenance: Chain adjustment, air filter cleaning, spark plug replacement, oil changes Repair Procedures: Step-by-step instructions for component removal, repair, and reinstallation Rebuild Instructions: Detailed guidance for engine and transmission overhauls Diagnostic Procedures: Methods for identifying and resolving mechanical and electrical issues Performance Tuning: Carburetor jetting, exhaust modifications, engine tuning for optimal performance Technical Depth Depth Level: Comprehensive (Suitable for DIY enthusiasts and professional mechanics) Diagnostic Tools: Includes information for standard mechanic tools and basic diagnostic techniques 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF for efficient information retrieval Print Quality Quality Description: High-resolution digital reproduction of original factory manual Binding Type Binding: Not Applicable (PDF Download) Paper Type Paper Type: Not Applicable (PDF Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, reed-valve, parallel-twin Displacement: 347cc (for most models within the range, some minor variations may exist) Bore X Stroke: 64.0mm x 54.0mm Compression Ratio: Approx. 6.5:1 (stock, varies slightly by year) Carburetion: Dual Mikuni VM26SS (or similar, specific model may vary by year) Performance Horsepower Estimated: 40-50+ HP (stock, highly dependent on year and state of tune) Torque Estimated: Approx. 25-30 lb-ft (stock) Fuel System Fuel Type: Unleaded gasoline (91 octane or higher recommended) Fuel Oil Mixture: 50:1 ratio (Yamalube 2-stroke oil or equivalent) Fuel Tank Capacity: Approx. 3.2 gallons (12 Liters) 🔧 Transmission Standard Transmission Type: 6-speed manual with constant mesh, wet multi-plate clutch Optional Optional Transmission: N/A (Standard) Features Gear Ratios: Detailed in manual (specific ratios vary by year and model) Transmission Fluid Type: Yamaha Gear Oil (or API GL-4, SAE 80W-90, or equivalent) Transmission Fluid Capacity: Approx. 0.8 quarts (0.75 Liters) 📐 Dimensions Exterior Overall Length: Approx. 70.9 inches (1800 mm) Overall Width: Approx. 45.5 inches (1155 mm) Overall Height: Approx. 43.3 inches (1100 mm) Weights Dry Weight: Approx. 397 lbs (180 kg) Ground Clearance: Approx. 4.3 inches (110 mm) Wheelbase Wheelbase: Approx. 49.6 inches (1260 mm) 🛡️ Safety Features Ratings Atv Safety Considerations: High-performance ATV requiring experienced operation; review of safety chapter in manual recommended. Active Features Braking System: Hydraulic disc brakes front and rear Passive Features Chassis Design: Durable steel frame providing structural integrity 💡 Technology Features Infotainment Infotainment...