The YFM200, also known as the Moto-4, is a capable sport-utility all-terrain vehicle produced from 1983 to 1986. Designed as an entry-level to mid-range ATV, it offers a reliable air-cooled engine, a robust chassis, and beginner-friendly operation suitable for light trail riding and utility tasks. A renowned manufacturer with a history of innovation, built the YFM200 to be a dependable machine, positioning it against contemporary models from Honda, Suzuki, and Kawasaki. Its engineering prioritizes straightforward functionality and durability, making it a practical choice for recreational and light work applications. This comprehensive workshop service repair manual in English provides detailed instructions for the maintenance, repair, and troubleshooting of the YFM200 (model code YFM200) for the years 1983 through 1986. It covers all essential systems, including the engine, fuel, ignition, lubrication, transmission, drivetrain, suspension, steering, brakes, electrical systems, and chassis. The manual offers step-by-step procedures for routine maintenance, component disassembly and assembly, engine and carburetor rebuilds, and electrical diagnostics, along with critical torque specifications. This resource is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their YFM200 ATV. 🏷️ Basic Information Identification Make: Yamaha Model: YFM200 Model Nickname: Moto-4 Codes Model Code Range: YFM200 👋 Introduction Market Position Segment: Entry-level to mid-range sport/utility ATV Competitive Analysis Competitors: Honda TRX200, Suzuki LT-F250, Kawasaki Bayou 220 (Approximate contemporary competitors in the 200-250cc ATV segment) Key Features Features: Reliable air-cooled engine, robust chassis, beginner-friendly operation, capable of light trail riding and utility tasks. Manual Purpose Purpose: To provide comprehensive instructions for the maintenance, repair, and troubleshooting of the Yamaha YFM200 ATV. 📋 Manual Details Coverage Areas Applicable Years: 1983, 1984, 1985, 1986 Page Count Estimated Pages: Hundreds (Specific count not provided, typical for comprehensive factory manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, cylinder head, piston, crankshaft, valve train, timing Fuel System: Carburetor assembly and tuning, fuel tank, fuel lines, fuel pump (if applicable) Ignition System: CDI unit, ignition coil, spark plug, wiring Lubrication System: Oil pump, oil filter, oil passages, oil capacity Transmission: Clutch operation, gear shifting mechanism, internal transmission components, lubrication Drivetrain: Final drive, differential (if applicable), drive shafts, U-joints Suspension: Front and rear suspension components, shock absorbers, springs, bushings, adjustment Steering: Steering column, tie rods, steering knuckles, adjustment Brakes: Front and rear brake systems (likely drum or early disc), brake fluid, master cylinder, calipers, lines, bleeding procedures Electrical System: Battery, charging system (stator, regulator/rectifier), lighting, starter motor, wiring diagrams, fuses Body Chassis: Frame, body panels, fenders, seat, handlebars, footpegs, mounting hardware Wheels Tires: Wheel specifications, tire sizes, inflation pressures, hub maintenance Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, brake checks, spark plug inspection Troubleshooting: Diagnostic procedures for common performance issues, starting problems, electrical faults Disassembly Assembly: Step-by-step instructions for removing and reinstalling major components and sub-assemblies Engine Rebuild: Detailed instructions for engine disassembly, cleaning, inspection, measurement, and reassembly Carburetor Rebuild: Complete guide to carburetor disassembly, cleaning, parts replacement, and adjustment Electrical Troubleshooting: Use of wiring diagrams, testing electrical components, diagnosing shorts and open circuits Suspension Adjustment: How to adjust or replace suspension components for optimal performance Brake Service: Brake pad replacement, brake bleeding, inspection of brake components Torque Specifications: Accurate torque values for critical fasteners throughout the vehicle Technical Depth Depth: Comprehensive Factory Service Manual (FSM) level detail, suitable for professional technicians and advanced DIY mechanics. Diagnostic Tools: Likely covers basic electrical testing using multimeters, visual inspection, and component testing. Special Tools: May list specific Yamaha special tools required for certain procedures. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality Printability: Designed for printing, allowing users to print entire sections or the full manual. Binding Type Binding Style: N/A (Digital Download - Printing and binding at user's discretion) Paper Type Paper Recommendation: N/A (Digital Download - User choice for printing media) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, Air-cooled, SOHC Displacement: 196 cc (Cubic Centimeters) Bore X Stroke: 65.0 mm x 57.3 mm (Typical for this class, consult manual for exact figures) Compression Ratio: 9.4:1 (Typical, consult manual for exact figures) Valves Per Cylinder: 2 Performance Horsepower: Approx. 16-18 HP (Estimate based on class, consult manual for exact figures) Torque: Approx. 11-13 lb-ft (Estimate based on class, consult manual for exact figures) Fuel System Carburetor Type: Mikuni VM series (likely VM28 or similar, consult manual for exact model) Fuel Type: Unleaded Gasoline Fuel Tank Capacity: Approx. 2.6 Gallons (Estimate, consult manual for exact figures) 🔧 Transmission Standard Type: 5-speed manual transmission with automatic clutch Optional Optional Transmissions: N/A (Standard configuration) Features Drive System: 2WD (Two-Wheel Drive) Final Drive: Chain Drive 📐 Dimensions Exterior Length: Approx. 71.5 in (Estimate, consult manual for exact figures) Width: Approx. 41.1 in (Estimate, consult...