🏷️ Basic Information Identification Make: Yamaha Model: YFM225 Moto 4 Model Nickname: Moto 4 Vehicle Type: All-Terrain Vehicle (ATV) Generation Production Years Covered: 1986, 1987, 1988 👋 Introduction Market Position Target User: Yamaha YFM225 Moto 4 owners, DIY mechanics, repair shops Competitive Analysis Value Proposition: Provides dealership-level technical information for self-service and repair, saving on labor costs. Key Features Digital Access: Instant delivery, no shipping wait times Usability: Printable sections for clean workshop use Navigation: Improved with index/bookmarks for quick access to information 📋 Manual Details Coverage Areas Primary Coverage: Complete service, repair, and workshop procedures Page Count Estimated Page Count: Not specified (digital format, often comprehensive) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Adobe Acrobat PDF 📖 Manual Coverage Systems Covered Engine: Detailed diagnosis, disassembly, assembly, and tuning Transmission: Operation, maintenance, and repair of the gearbox and drive components Chassis: Frame inspection, repair, and related components Steering: Steering system components, linkage, and adjustments Suspension: Front and rear suspension components, shock absorbers, and linkage Brakes: Brake system maintenance, bleeding, component replacement (front and rear) Electrical: Wiring diagrams, lighting, ignition system, charging system, starter Fuel System: Carburetor overhaul, fuel tank, fuel lines, and pump (if applicable) Lubrication: Lubrication points, schedules, and fluid specifications Clutch: Clutch operation, adjustment, and component service Seats System: Seat mounting and related components Locks: Ignition switch and related locking mechanisms Battery: Battery maintenance, charging, and replacement Procedures Included Maintenance: Scheduled maintenance, inspections, fluid changes, filter replacements Troubleshooting: Diagnostic procedures for common and uncommon issues Repair: Step-by-step repair instructions for all major and minor components Disassembly Assembly: Detailed instructions for taking apart and reassembling vehicle components Torquing: Specification of torque values for critical fasteners Wiring Diagrams: Comprehensive electrical schematics for the entire ATV Technical Depth Depth: Comprehensive (from basic maintenance to full engine rebuilds and electrical diagnostics) 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content (typical for well-produced PDFs) Print Quality Printability: Printable sections or entire manual Image Quality: High-resolution diagrams and illustrations (implied for dealership-grade manual) Binding Type Binding Recommendation: Suitable for 3-ring binder insertion Paper Type Recommended Paper Type: Standard printer paper or heavier stock for durability ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, Air-cooled, SOHC Displacement: 222 cc (Actual displacement often quoted slightly differently, e.g., 223cc for similar models) Bore X Stroke: Typically around 66.0 mm x 65.0 mm (specifics to be confirmed in manual) Compression Ratio: Approximately 9.2:1 (typical for this era and displacement) Performance Horsepower: Estimated 17-19 HP (actual figures vary) Torque: Estimated 13-15 lb-ft (actual figures vary) Fuel System Carburetor: Mikuni VM Series (e.g., VM26 or similar), single carburetor Fuel Type: Unleaded gasoline Ignition Ignition System: CDI (Capacitor Discharge Ignition) Cooling Cooling Method: Air-cooled 🔧 Transmission Standard Transmission Type: Automatic (Torque Converter) Drive System: Shaft drive (2WD) Features Reverse: Yes 📐 Dimensions Exterior Overall Length: Approx. 70.5 in (1790 mm) Overall Width: Approx. 43.5 in (1105 mm) Overall Height: Approx. 41.1 in (1045 mm) Weights Dry Weight: Approx. 370 lbs (168 kg) Fuel Capacity: Approx. 2.6 US gal (9.8 L) 🛡️ Safety Features Active Features Brakes: Drum brakes (front and rear) Parking Brake: Yes Passive Features Lighting: Headlight, taillight, brake light 💡 Technology Features Infotainment Display: Basic instrument cluster (speedometer, odometer, warning lights) Driver Assistance Traction Control: N/A Connectivity Charging Port: N/A (typically no integrated charging ports) 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific hours/miles (typically every 100-200 hours or annually) Air Filter Cleaning: Frequent checks, especially in dusty conditions (refer to manual) Spark Plug Replacement: Refer to manual (typically every 2,000-5,000 miles or annually) Fluid Specifications Engine Oil Type: Yamalube or equivalent motorcycle-specific 4-stroke oil (e.g., SAE 10W-30 or 20W-40, viscosity dependent on ambient temperature) - see manual for exact spec. Engine Oil Capacity: Approx. 1.6 US qt (1.5 L) without filter change, 1.7 US qt (1.6 L) with filter change (verify in manual) Gear Oil Type: Yamaha specific gear oil or equivalent (check manual for viscosity) Brake Fluid Type: DOT 3 or DOT 4 brake fluid (verify in manual) Known Issues Carburetor Clogging: Common with infrequent use or poor fuel quality, requiring cleaning/rebuild. Electrical Connections: Corrosion or loose connections can cause intermittent issues, especially in wet conditions. Brake Wear: Drum brakes require periodic adjustment and eventual replacement of shoes. Suspension Seals: Age-related degradation of seals can lead to leaks. 📚 Vehicle History Brand Heritage Manufacturer: Yamaha Motor Company, a Japanese multinational corporation known for its motorcycles, marine products, and musical instruments. Model Evolution Moto 4 Line: The Moto 4 series was Yamaha's entry into the utility ATV market, known for its reliability and user-friendliness. The YFM225 was an important model in this line. Production Manufacturing Origin: Likely manufactured in Japan or the United States (specific plant not detailed) 🏆 Awards & Recognition Recognitions Industry Standing:...