Basic Information Identification Make: Yamaha Model: YFM 350 Wolverine Year: 1987 Vehicle Type: ATV (All-Terrain Vehicle) Generation Generation Code: 1st Generation (Wolverine 350 series) Codes Chassis Code: Likely a specific frame designation for the YFM 350 Wolverine, though not explicitly stated in product info. Introduction Market Position Positioning: The Yamaha YFM 350 Wolverine was positioned as a capable and versatile sport utility ATV, offering a balance of performance for recreational riding and utility tasks. It was a significant model in Yamaha's ATV lineup during the late 1980s. Competitive Analysis Competitors 1987: Competed against models from Honda (e.g., TRX series), Suzuki (e.g., QuadRunner series), and Kawasaki (e.g., Bayou series). Key Features Atv Distinguishing Features: Known for its rugged design, reliable engine, and comfortable riding position for its era. Offered a good blend of power and handling for various terrains. Manual Purpose Purpose: To provide comprehensive, accurate, and factory-authorized repair and maintenance information for the 1987 Yamaha YFM 350 Wolverine ATV. Manual Value Proposition Value: Empowers owners and technicians to perform all necessary maintenance, diagnostics, and repairs, ensuring the longevity and optimal performance of the ATV, replicating dealer-level service capabilities. Manual Details Coverage Areas Main Coverage: Complete workshop repair and service for Yamaha YFM 350 Wolverine 1987. Specific Systems Covered: General Information, Specifications, Periodic Checks and Adjustments, Engine, Cooling System, Carburetion, Drive Train, Chassis, Electrical, Troubleshooting. Page Count Estimated Page Count: Cannot be determined from provided information, but described as 'complete' and 'packed with all the information you need'. Manual Type Type: Factory Service Repair Manual (Workshop Manual) Language Language: English (implied by product description and typical dealer manuals) Format Format: PDF Software Requirements: Adobe PDF Reader, WinZip Platform Compatibility: All Versions of Windows & Mac Features Zoom Functionality: YES Manual Coverage Systems Covered Engine: Comprehensive coverage including internal components, performance tuning, and common issues. Cooling System: Detailed procedures for radiator, fan, hoses, coolant type, and thermostat service. Carburetion: In-depth information on carburetor disassembly, cleaning, adjustment, and jetting. Drive Train: Covers transmission, differential, drive shafts, CV joints, and final drive components. Chassis: Includes frame, suspension (front and rear), steering, and wheels. Electrical: Extensive coverage including wiring diagrams, starter system, ignition system, lighting, and battery service. Troubleshooting: Systematic diagnostic procedures for identifying and resolving common and uncommon problems. Procedures Included Maintenance: Routine maintenance tasks such as oil changes, filter replacements, spark plug service, and lubrication. Repair: Step-by-step repair instructions for all major vehicle systems, from minor adjustments to complete component overhauls. Diagnostics: Detailed diagnostic flowcharts and explanations for fault finding. Adjustments: Precise instructions for adjusting clutch, brakes, carburetor idle, and other critical settings. Torque Settings: Specific torque values for all critical fasteners, crucial for proper assembly and safety. Technical Depth Depth: Factory-level detail, suitable for professional mechanics and advanced DIY enthusiasts. Covers everything from basic checks to complete engine rebuilds and electrical troubleshooting. Manual Specifications File Format File Type: PDF Searchability: Implied by PDF format, likely allows keyword searching for procedures and specifications. Print Quality Printability: High-quality digital reproduction of original factory documentation, suitable for printing sections or the entire manual. Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC, Air-cooled Engine Displacement: 348cc (Cubic Centimeters) Bore X Stroke: Standard specification for this engine, typically found within the manual. (e.g., 83.0 mm x 64.5 mm) Compression Ratio: Standard specification for this engine, typically found within the manual. (e.g., 9.5:1) Performance Horsepower: Typically around 20-25 HP at peak RPM for this class of engine, specific figures available in manual. Torque: Specific torque figures and curves would be detailed in the manual. Fuel System Fuel Delivery: Carburetor Carburetor Model: Likely a Mikuni BS36 (single barrel), specific model details in manual. Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Cooling System Cooling Method: Air-cooled with integrated oil cooling passages or a small oil cooler, as detailed in the manual. Lubrication Oil Type: Yamaha recommends specific motorcycle/ATV engine oil grades. Typical: SAE 10W-30 or 10W-40, API SE, SF, SG or higher. Detailed specification in manual. Oil Capacity: Specific oil capacity for engine and final drive, crucial for maintenance. (e.g., ~1.8 L for engine, check manual for exact figure). Spark Plug Recommended Plug Type: Typically NGK or Denso. For example, NGK CR7E or similar. Exact plug specification with correct heat range in manual. Transmission Standard Transmission Type: Automatic (Yamaha's Ultramatic® continuously variable transmission - CVT), or a 5-speed manual with an automatic clutch (R-N-1-2-3-4-5). Drive System: 2WD (Two-Wheel Drive) or 4WD (Four-Wheel Drive), depending on the specific Wolverine 350 sub-model. Manual covers the applicable drive system. Optional Optional Transmission: N/A - Standard configuration for the YFM 350 Wolverine model year. Features Clutch Type: Automatic centrifugal clutch if manual transmission, or torque converter for CVT. Details in manual. Fluid Type Transmission Oil: Specific gear oil or ATV...