The Yamaha YFZ350 Banshee is a high-performance sport ATV, renowned for its powerful V-twin, two-stroke engine and agile handling designed for off-road exhilaration. First introduced in 1987, this model, specifically the first generation with the DB01 chassis code, has become an iconic machine in the motorsports world. Its engineering quality is evident in its robust high-tensile steel double cradle frame and the dual Mikuni carburetors that contribute to its impressive power delivery. The YFZ350 is celebrated for its aggressive styling and a thrilling ride that has captivated enthusiasts for years. This comprehensive workshop service manual is designed to guide owners and technicians through the maintenance, diagnostics, troubleshooting, and overhaul of the Yamaha YFZ350 Banshee, specifically covering the 1997 and 1998 model years. With 275 pages of detailed information, this manual provides step-by-step instructions for all major systems, including the engine, transmission, fuel, ignition, electrical, bodywork, suspension, brakes, and cooling systems. It covers routine maintenance, performance tuning, and detailed component rebuilds, ensuring the vehicle remains in optimal condition and longevity. The manual emphasizes safety through clear warnings and cautions, enabling users to perform professional-level service. 🏷️ Basic Information Identification Make: Yamaha Model: YFZ350 Model Designation: Banshee Vehicle Type: Sport ATV Engine Type: Two-stroke, liquid-cooled, reed valve, V-twin Chassis Type: High-tensile steel, double cradle Generation Generation: First Generation (DB01 chassis code) Codes Chassis Code Relevant: DB01 👋 Introduction Market Position Positioning: High-performance sport ATV, renowned for its power and aggressive styling. Competitive Analysis Competitors Historical: Suzuki LT250R, Honda TRX250R, Kawasaki Mojave 250 Key Features Engine Characteristics: Powerful V-twin, two-stroke engine offering significant horsepower and torque. Handling: Agile handling and suspension designed for off-road performance. Dual Carburetors: Separate carburetors for each cylinder contribute to optimal power delivery. Manual Purpose Purpose: To provide comprehensive instructions for maintenance, repair, and overhaul, enabling technicians and owners to service the YFZ350 effectively. Manual Value Proposition Value: Empowers users to perform professional-level maintenance and repairs, saving time and money while ensuring optimal vehicle performance and longevity. 📋 Manual Details Coverage Areas Applicable Model Years: 1997, 1998 Primary Coverage: Workshop Service and Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting, Overhaul Page Count Total Pages: 275 Manual Type Type: Workshop Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete Engine Tune-up, Removal, Installation, Disassembly, Reassembly, Performance Tuning Transmission: Transmission Removal, Installation, Disassembly, Reassembly, Gearbox Servicing Fuel System: Carburetor Servicing and Tuning, Fuel Tank, Fuel Lines, Fuel Pump Operation Ignition: Ignition System Diagnostics, CDI Unit, Spark Plugs, Timing Lubrication System: Oil Pump Operation, Premix Ratio (if applicable), Lubrication System Maintenance Exhaust: Exhaust System Components, Pipe Servicing, Silencer Maintenance Electrical System: Wiring Diagrams, Lighting, Starting System, Charging System, Electrical Component Diagnosis Bodywork: Body Panel Removal, Installation, Fairings, Seat, Handlebars Suspension: Front and Rear Suspension Servicing, Shock Absorber Adjustments, Bushings Brakes: Brake System Overhaul, Pad Replacement, Fluid Bleeding, Disc Servicing Cooling System: Radiator Servicing, Coolant Exchange, Thermostat Operation Wheels And Tires: Tire Maintenance, Wheel Bearing Servicing, Rim Inspection Procedures Included Maintenance: Routine Service, Tune-ups, Filter Replacements, Fluid Changes Repair: Component Repair, Assembly/Disassembly Procedures, Troubleshooting Guides Diagnostics: Fault finding for various systems, diagnostic flowcharts Overhaul: Complete engine, transmission, and component rebuild procedures Special Tools: Identification and usage of Yamaha-specific tools for various procedures Technical Depth Depth: Comprehensive; suitable for professional technicians and advanced DIY enthusiasts Diagnostic Focus: Detailed troubleshooting steps for common and complex issues Rebuild Detail: Step-by-step instructions for complete engine and component rebuilds 📊 Manual Specifications File Format Format: PDF Quality: High-resolution, clear text and images Print Quality Printability: Yes, printable pages Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: 350cc V-twin (specific code varies by internal Yamaha designation) Bore X Stroke: 64.0 mm x 54.0 mm Displacement: 347 cc Compression Ratio: 7.1:1 (typical for this era, subject to manual confirmation) Ignition System: CDI (Capacitor Discharge Ignition) Cooling Method: Liquid-cooled Performance Horsepower Approx: 50-55 HP (estimated, subject to specific tuning and regulations) Torque Approx: 30-35 lb-ft (estimated) Fuel System Carburetors: Dual Mikuni VM26SS Fuel Type: Unleaded gasoline (minimum 87 octane recommended, refer to manual for precise specification) Premix Ratio: 50:1 (Yamalube 2-stroke oil or equivalent, consult manual) 🔧 Transmission Standard Type: 6-speed constant mesh Clutch: Wet, multi-plate Features Gear Selection: Return type (one down, five up) Fluid Type Transmission Oil: Yamalube Gear Oil (specific viscosity to be confirmed in manual, likely SAE 80W-90 or similar) Fluid Capacity Oil Capacity: Refer to manual for exact capacity (typically around 0.6-0.8 liters) 📐 Dimensions Exterior Length: Approximately 1855 mm (73.0 in) Width: Approximately 1120 mm (44.1 in) Height: Approximately 1040 mm (40.9 in) Wheelbase: Approximately 1280 mm (50.4 in) Weights Dry Weight: Approximately 175 kg (386 lbs) Fuel Capacity: Approximately 10.0 Liters (2.6 US gallons) Suspension Travel Front Travel: Approximately 230 mm (9.1 in) Rear Travel: Approximately 240...