🏷️ Basic Information

Make:

Yamaha

Model:

YFM200N

Model Nickname:

Moto-4

Production Years Covered:

1983, 1984, 1985, 1986

Manual Product Code:

Likely internal, not provided

Vehicle Chassis Codes:

YFM200N (specific VIN prefixes may vary by region)

👋 Introduction

Vehicle Segment:

Sport ATV / All-Terrain Vehicle

Target Demographic:

Recreational riders, utility users, entry-level ATV enthusiasts.

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.

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

Manual Type:

Workshop Service Repair Manual

Manual Scope:

Complete Factory Official Service Manual

Intended Audience:

Yamaha Technicians, Professional Mechanics, DIY Enthusiasts

Estimated Page Count:

Hundreds of pages (actual count not specified, but indicative of comprehensive content)

Language:

English (Assumed for North American market product description)

Download Format:

PDF Download

Printability:

Printable in its entirety

📖 Manual Coverage

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.

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.

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 Type:

PDF

Searchability:

Presumed to be searchable text within the PDF for quick information retrieval.

Print Resolution:

High resolution suitable for clear printing of text and diagrams.

Binding Style:

N/A (Digital PDF download)

Paper Quality:

N/A (Digital PDF download)

⚙️ Engine Specifications

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)

Horsepower:

Approximately 15-18 HP (estimated, actual figures vary by tuning and year)

Torque:

Approximately 12-14 lb-ft (estimated)

Fuel Type:

Unleaded gasoline

Fuel Tank Capacity:

Approximately 2.6 US gallons (9.8 L)

Ignition Type:

CDI (Capacitor Discharge Ignition)

Cooling Method:

Air cooling

🔧 Transmission

Transmission Type:

5-speed manual with automatic clutch

Optional Transmission:

N/A (Typically single transmission option for this model)

Drive System:

Shaft drive (RWD)

Final Drive:

Bevel gear (shaft drive)

📐 Dimensions

Overall Length:

Approximately 71.5 inches (1815 mm)

Overall Width:

Approximately 40.0 inches (1015 mm)

Overall Height:

Approximately 43.1 inches (1095 mm)

Dry Weight:

Approximately 357 lbs (162 kg)

Curb Weight:

Not explicitly provided, but typically around 380-400 lbs with fluids.

Ground Clearance:

Approximately 6.3 inches (160 mm)

Front Tire Size:

AT22 x 8-10 (common for the era)

Rear Tire Size:

AT22 x 10-10 (common for the era)

Front Wheel Type:

Steel, 10-inch diameter

Rear Wheel Type:

Steel, 10-inch diameter

🛡️ Safety Features

Atv Safety Standards:

Adheres to industry standards for ATVs of its time; modern safety features not applicable.

Braking System:

Front and rear drum brakes.

Throttle Limiter:

Likely equipped with a throttle limiter screw for beginner control.

Lighting:

Single halogen headlight, dual taillight/stoplight.

Operator Control:

Handlebar controls with clutch lever, throttle, and brake levers.

💡 Technology Features

Infotainment Systems:

N/A (This is a 1980s utility/recreational ATV with no electronic infotainment systems).

Driver Assistance Features:

N/A (No electronic driver assistance features).

Connectivity Options:

N/A (No electronic connectivity features).

🔧 Maintenance

Engine Oil Change:

Every 600 miles or 6 months (typical for the era).

Air Filter Cleaning:

Every 600 miles or annually, depending on operating conditions.

Spark Plug Replacement:

Every 1,800 miles or 18 months (typical).

Valve Clearance Check:

Every 1,800 miles or 18 months (typical).

Chain Lubrication Adjustment:

Every 300 miles or monthly, and adjust as needed.

Engine Oil Type:

Yamalube 4 (or equivalent API SE, SF, SG service classification, SAE 10W-40 or 20W-40 recommended depending on temperature).

Engine Oil Capacity:

Approximately 1.8 L (1.9 US qt) for oil change, 2.1 L (2.2 US qt) for oil filter change.

Gear Oil Type:

Yamalube Hypoid Gear Oil (or equivalent SAE 80W-90 API GL-4).

Gear Oil Capacity:

Approximately 100 ml (0.1 US qt) for final drive.

Common Wear Items:

Chain and sprockets, brake shoes, wheel bearings, swingarm bushings, carburetor jets due to fuel degradation, CDI unit (can be prone to failure with age).

Engine Performance Degradation:

Carbon buildup in exhaust and piston rings, carburetor jet clogging, weak ignition spark.

Electrical Issues:

Corroded connections, aging wiring harness, stator output degradation.

Trouble Areas Covered:

Starting issues, poor acceleration, engine misfires, electrical faults, braking problems.

📚 Vehicle History

Yamaha Atv Legacy:

Yamaha has a long and successful history in ATV manufacturing, starting with the groundbreaking 'Three Wheelers' and transitioning to popular 'Four Wheelers' like the Moto-4 and later Warrior and Raptor models.

Moto-4 Lineage:

The YFM200N Moto-4 was part of Yamaha's early entry into the 4-wheel ATV market, establishing a platform for more performance-oriented and utility-focused models that followed.

Predecessors And Successors:

Evolved from Yamaha's 3-wheelers and paved the way for the YFM225, YFM250, and the sportier YFM250R.

Manufacturing Location:

Likely manufactured in Japan or at Yamaha's overseas facilities at the time.

Market Impact:

Contributed to Yamaha's growing market share in the emerging ATV segment, offering a balance of utility and recreational capability.

🏆 Awards & Recognition

Industry Awards:

Specific awards for the YFM200N are unlikely to be widely documented, but it was a significant model in Yamaha's ATV lineup during its production years.

Consumer Ratings:

Generally considered a reliable and capable utility ATV for its class and era.

Safety Certifications:

Met all relevant safety certifications for ATVs in its production markets.