This manual covers the Moto 4 250 and 350 models produced between 1987 and 1995. Known for its ruggedness and reliability, the Moto 4 series has been a staple in utility all-terrain vehicles, offering dependable performance for various tasks. The legacy in powersports, particularly with its durable ATV offerings, is exemplified by the Moto 4 line, which features robust engineering and practical design for both work and recreational use. This comprehensive factory-type service repair workshop manual in English provides detailed instructions for the maintenance, troubleshooting, and repair of your Moto 4. It covers all essential systems, including the engine, transmission, chassis, suspension, brakes, and electrical components. With step-by-step procedures, diagnostic charts, and clear diagrams, this manual is an indispensable resource for owners and technicians aiming to keep their vehicle in optimal condition and ensure longevity. 🏷️ Basic Information Identification Make: Yamaha Model: Moto 4 Model Variant: 250 / 350 Codes Product Code: YAM-M4-250-350-1987-1995-PDF 👋 Introduction Market Position Target Audience: Owners and independent repair shops seeking professional-grade documentation for servicing and repairing Yamaha Moto 4 250 and 350 models. Competitive Analysis Value Proposition: Provides the same level of detail and accuracy as OEM service manuals at a fraction of the cost, enabling cost savings on repair and maintenance. Eliminates the need for multiple, fragmented repair guides. Key Features Unique Selling Points: Instant download access, factory-type quality, comprehensive coverage, detailed diagrams, step-by-step instructions, PC/Mac compatibility, cost-effective repair solution. 📋 Manual Details Coverage Areas Years Covered: 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 Page Count Estimated Page Count: Extensive (typical for a comprehensive factory service manual) Manual Type Type: Factory Type Service Repair Workshop Manual Language Language: English Format Format: PDF (Portable Document Format) 📖 Manual Coverage Systems Covered Engine: Engine overhaul, diagnostics, tuning, cooling system, lubrication system, starting system, ignition system, fuel system (carburetion, fuel delivery), exhaust system. Transmission: Gearbox service, clutch operation and adjustment, drive shaft, differential, torque converter (if applicable). Chassis And Suspension: Front suspension (forks, steering), rear suspension (shock absorbers, swingarm), wheel bearings, steering system, frame inspection and repair. Brakes: Hydraulic brake system (master cylinder, calipers, lines), brake pad replacement, brake fluid flush and bleeding, parking brake adjustment. Electrical System: Wiring diagrams, battery service, lighting system, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), ignition system components (CDI, coils), instrumentation, fuses, relays. Body And Trim: Fender removal/installation, seat removal/installation, handlebar components, plastic panel repairs, decals, rack systems. Procedures Included Maintenance: Scheduled maintenance tasks, oil and filter changes, air filter cleaning/replacement, spark plug replacement, lubrication points, pre-ride inspections. Troubleshooting: Diagnostic charts for common problems, symptom-based troubleshooting guides for engine performance, electrical issues, and starting problems. Repair And Rebuild: Step-by-step instructions for component disassembly, inspection, repair, and reassembly, including engine rebuilds, transmission overhaul, carburetor rebuilding. Adjustment: Carburetor jetting and idle speed adjustment, clutch cable adjustment, brake lever free play adjustment, chain tension adjustment. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission overhauls, electrical system diagnostics, and component rebuilding. Designed for professional mechanic-level understanding and execution. 📊 Manual Specifications File Format Compatibility: PC & MAC Compatible Print Quality Quality: High-resolution, professionally scanned PDF with clear, legible text and sharp, detailed diagrams and exploded views. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital PDF) Searchability Text Search: Searchable text within the PDF for quick information retrieval. Printability Print On Demand: Print what you need, when you need it. Allows for targeted printing of specific sections or entire chapters. ⚙️ Engine Specifications Primary Engine 250 Engine Type: Air-cooled, 4-stroke, SOHC, 2-valve, single-cylinder Displacement 250: 230cc (approximate, varies slightly by specific model year) Bore X Stroke 250: 68.0 mm x 64.0 mm (typical) Compression Ratio 250: 9.0:1 (typical) Primary Engine 350 Engine Type: Air-cooled, 4-stroke, SOHC, 2-valve, single-cylinder Displacement 350: 348cc (approximate, varies slightly by specific model year) Bore X Stroke 350: 82.0 mm x 64.0 mm (typical) Compression Ratio 350: 8.5:1 (typical) Performance Horsepower 250: Approx. 15-20 HP (varies by year and tuning) Horsepower 350: Approx. 20-25 HP (varies by year and tuning) Fuel System Carburetor: Mikuni VM Series (single carburetor, size varies by model year and displacement) Fuel Type: Unleaded gasoline Lubrication Oil Type: SAE 10W-40 API SE, SF or SG (or equivalent JASO MA) Oil Capacity With Filter: Approx. 1.8-2.0 Liters (check specific model year for exact capacity) 🔧 Transmission Standard Type: Manual, constant mesh, 5-speed (standard on most models) Clutch: Wet, multi-plate, manual operation Drive Final Drive: Shaft drive (enclosed, low maintenance) Features Gear Ratios: Detailed gear ratios for each speed are provided in the manual. 📐 Dimensions Exterior Wheelbase: Varies by year and model, typically around 48-50 inches (1220-1270 mm). Overall Length: Varies by year and model, typically around 70-74 inches (1780-1880 mm). Weights Dry Weight: Approx. 400-450 lbs (180-205 kg) depending on model and configuration. Gvwr:...