The Yamaha YFM200N, also known as the Moto-4, is a versatile All-Terrain Vehicle (ATV) produced from 1983 to 1986. This model represents Yamaha's early contributions to the growing ATV market, offering a blend of recreational capability and utility. Powered by a 195 cc air-cooled, 4-stroke SOHC engine, it typically features a 5-speed manual transmission with an automatic clutch and a reliable shaft drive system. With its robust engineering and design for its era, the Moto-4 was built to handle various terrains, making it a capable choice for both recreational riders and those requiring a dependable workhorse. This workshop service repair manual provides comprehensive factory-level guidance for the Yamaha YFM200N Moto-4 across its production years. It covers all essential aspects of maintenance, diagnosis, and repair, including detailed procedures for the engine, fuel system, electrical system, drivetrain, suspension, brakes, chassis, and wheels. The manual includes crucial technical specifications, torque values, clearances, and troubleshooting guides to assist technicians, professional mechanics, and DIY enthusiasts in maintaining the vehicle's optimal performance and longevity. 🏷️ Basic Information Identification Make: Yamaha Model: YFM200N Model Nickname: Moto-4 Production Years Covered: 1983, 1984, 1985, 1986 Codes Manual Product Code: Likely internal, not provided Vehicle Chassis Codes: YFM200N (specific VIN prefixes may vary by region) 👋 Introduction Market Position Vehicle Segment: Sport ATV / All-Terrain Vehicle Target Demographic: Recreational riders, utility users, entry-level ATV enthusiasts. Competitive Analysis Key Competitors Era: Early to mid-1980s sport ATVs from manufacturers like Honda (e.g., TRX200), Kawasaki (e.g., KLT200), Suzuki (e.g., ALT250), and possibly early Yamaha models like the YFM250R. Key Features Engine Configuration: Single-cylinder, air-cooled, two-stroke (common for this era, though 200cc can sometimes be 4-stroke, YFM200N is typically 2-stroke) or four-stroke. Transmission Type: Typically a 5-speed manual transmission with an automatic clutch or a semi-automatic transmission. Drivetrain Configuration: Shaft drive or chain drive, likely RWD for the YFM200N. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Manual Scope: Complete Factory Official Service Manual Intended Audience: Yamaha Technicians, Professional Mechanics, DIY Enthusiasts Page Count Estimated Page Count: Hundreds of pages (actual count not specified, but indicative of comprehensive content) Language Language: English (Assumed for North American market product description) Format Download Format: PDF Download Printability: Printable in its entirety 📖 Manual Coverage Systems Covered Engine: Comprehensive coverage of engine disassembly, assembly, inspection, adjustment, and troubleshooting. Fuel System: Carburetor tuning, fuel pump operation, fuel line maintenance. Electrical System: Wiring diagrams, ignition system diagnosis and repair, lighting, charging system (stator, regulator/rectifier), battery maintenance. Drivetrain: Chain drive maintenance, sprocket inspection and replacement, gearbox operation and overhaul. Suspension: Front fork servicing, rear shock absorber inspection and replacement, linkage lubrication. Brakes: Drum brake inspection, adjustment, and component replacement (front and rear). Chassis And Body: Frame inspection, body panel removal and installation, seat, handlebars, fenders. Wheels And Tires: Tire pressure checks, wheel bearing inspection, rim maintenance. Procedures Included Maintenance Procedures: Oil changes, filter replacements, chain lubrication and adjustment, spark plug replacement, air filter cleaning/replacement, valve clearance checks. Diagnostic Procedures: Troubleshooting guides for common performance issues, starting problems, electrical faults. Repair Procedures: Step-by-step instructions for engine rebuilds, carburetor overhauls, brake system repairs, electrical component replacement. Adjustment Procedures: Carburetor idle and mixture adjustments, brake cable tension, clutch lever free play. Technical Depth Depth Of Information: Comprehensive factory-level detail, suitable for complete mechanical overhauls and advanced diagnostics. Special Tools: Likely lists required special Yamaha tools for specific procedures (e.g., flywheel puller, bearing drivers). Torque Specifications: Detailed torque values for critical fasteners throughout the vehicle. Clearances And Tolerances: Precise specifications for engine component clearances (e.g., piston ring gap, valve stem clearance). 📊 Manual Specifications File Format File Type: PDF Searchability: Presumed to be searchable text within the PDF for quick information retrieval. Print Quality Print Resolution: High resolution suitable for clear printing of text and diagrams. Binding Type Binding Style: N/A (Digital PDF download) Paper Type Paper Quality: N/A (Digital PDF download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, SOHC Displacement: 195 cc Bore X Stroke: 66.0 mm x 57.0 mm Compression Ratio: 9.7:1 Carburetor Model: Mikuni VM26SS (example, specific variant may differ) Performance Horsepower: Approximately 15-18 HP (estimated, actual figures vary by tuning and year) Torque: Approximately 12-14 lb-ft (estimated) Fuel System Fuel Type: Unleaded gasoline Fuel Tank Capacity: Approximately 2.6 US gallons (9.8 L) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Cooling System Cooling Method: Air cooling 🔧 Transmission Standard Transmission Type: 5-speed manual with automatic clutch Optional Optional Transmission: N/A (Typically single transmission option for this model) Features Drive System: Shaft drive (RWD) Final Drive: Bevel gear (shaft drive) 📐 Dimensions Exterior Overall Length: Approximately 71.5 inches (1815 mm) Overall Width: Approximately 40.0 inches (1015 mm) Overall Height: Approximately 43.1 inches (1095 mm) Weights Dry Weight: Approximately 357 lbs (162 kg) Curb Weight: Not explicitly provided, but typically around 380-400 lbs with fluids. Ground Clearance:...