🏷️ Basic Information Identification Make: Yamaha Model: YFM250 Moto 4 Model Nickname: Moto 4 Vehicle Type: All-Terrain Vehicle (ATV) Years Covered: 1989, 1990, 1991 👋 Introduction Market Position Target Audience: Yamaha YFM250 Moto 4 owners, DIY mechanics, and professional repair shops Competitive Analysis Manual Value: Provides professional repair data typically restricted to dealership technicians, offering cost savings and increased vehicle longevity. Key Features Digital Delivery: Instant download, eliminating shipping delays. Organizational Enhancements: Improved with index and bookmarks for efficient navigation. Flexibility: Printable sections for on-the-job use and easy disposal of soiled pages. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and maintenance Page Count Estimated Page Count: N/A (Digital Format) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Adobe Acrobat PDF 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, diagnosis, tuning, and repair Transmission: Gearbox operation, maintenance, and repair Chassis: Frame integrity, welding, alignment, and component mounting Electrical: Wiring diagrams, component testing, battery, lighting, ignition system Fuel System: Carburetor, fuel lines, fuel pump (if applicable), and fuel tank service Suspension: Front and rear suspension components, adjustments, and repair Brakes: Brake system overhaul, fluid replacement, pad/shoe inspection and replacement Steering: Steering column, tie rods, knuckle service, and alignment Lubrication: Lubrication points, recommended lubricants, and capacities Clutch: Clutch assembly inspection, adjustment, and replacement Seats System: Seat mounting and upholstery care Locks: Ignition and storage compartment locks (if applicable) Procedures Included Maintenance: Scheduled maintenance tasks, inspections, and adjustments Troubleshooting: Diagnostic procedures for common and uncommon issues Repair: Step-by-step instructions for component replacement and repair Rebuilds: Engine and transmission component rebuild procedures Disassembly Assembly: Detailed instructions for component removal and installation Specifications: Torque specifications, clearances, and tolerances Technical Depth Depth: Professional-level, dealership-grade repair and maintenance information 📊 Manual Specifications File Format File Type: Adobe Acrobat PDF Searchability: Likely searchable text within the PDF (depending on OCR quality) Print Quality Printability: Printable sections or entire manual Binding Type Binding Recommendation: Recommended for use with 3-ring binders Paper Type Paper Type Recommendation: Standard printing paper ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC Displacement: 230 cc (approximate) Bore X Stroke: Specifics to be detailed in the manual Compression Ratio: Specifics to be detailed in the manual Performance Horsepower: Estimates range from 16-20 HP (actual specifications in manual) Torque: Specifics to be detailed in the manual Fuel System Carburetor Type: Mikuni VM series (likely single carburetor, specific model in manual) Fuel Type: Unleaded gasoline Fuel Tank Capacity: Approximately 2.5-3.0 gallons (specifics in manual) 🔧 Transmission Standard Type: 5-speed manual with automatic clutch (often referred to as semi-automatic) Gear Ratios: Detailed in the manual Features Drive System: Shaft drive 📐 Dimensions Exterior Length: Approx. 75-80 inches (specifics in manual) Width: Approx. 40-45 inches (specifics in manual) Height: Approx. 42-46 inches (specifics in manual) Weights Dry Weight: Approx. 400-450 lbs (specifics in manual) Ground Clearance: Approx. 6-8 inches (specifics in manual) 🛡️ Safety Features Ratings Atv Safety: Manual will cover safe operating procedures and recommended safety gear. Active Features Braking System: Hydraulic disc brakes (front and rear), details on maintenance and repair in manual. 💡 Technology Features Infotainment Features: Basic functionality focused on essential ATV operation; no advanced infotainment systems. Driver Assistance Features: No electronic driver assistance features common in modern vehicles. Connectivity Features: No connectivity features. 🔧 Maintenance Service Intervals Oil Change: Details on recommended intervals (e.g., every 1000-1500 miles or annually) will be in the manual. Spark Plug Replacement: Recommended service intervals will be provided in the manual. Air Filter Cleaning: Regular inspection and cleaning intervals are crucial and detailed in the manual. Fluid Specifications Engine Oil Type: Yamalube or equivalent API SG or higher, SAE 10W-30 or 10W-40 (check manual for exact grade and viscosity). Engine Oil Capacity: Approximately 1.5-2.0 liters (refer to manual for precise capacity). Brake Fluid: DOT 3 or DOT 4 hydraulic brake fluid (manual will specify). Gear Oil Type: Specific gear oil or suitable API GL-3 or GL-4 lubricant (manual will specify). Known Issues Common Wear Items: Brake pads, tires, suspension bushings, and carburetor jets are common wear items that require periodic inspection and replacement. Carburetor Clogging: Can occur with infrequent use or poor fuel quality, requiring cleaning and adjustment. Electrical Connections: Corrosion or loose connections can lead to intermittent electrical issues, addressed in the electrical section. 📚 Vehicle History Brand Heritage Yamaha Atv: Yamaha has a long-standing history in the ATV market, known for reliability and performance. Model Evolution Yfm250 Moto4: The Moto 4 series was a popular line of utility and recreational ATVs for Yamaha during its production run. Production Manufacturing Location: Primarily manufactured in Japan. 🏆 Awards & Recognition Recognitions Atv Market: While specific awards for the YFM250 Moto 4 model might not be widely publicized, Yamaha's ATVs have historically received positive reviews for their utility and reliability.