Yamaha ATV 1989-1991 YFM 250 Moto-4 Repair Manual

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This manual covers the YFM 250 Moto-4 All-Terrain Vehicle (ATV) produced for the 1989, 1990, and 1991 model years. Known for engineering quality and reliability, the YFM 250 Moto-4 was...

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Tipo: Atv

Proveedor:

SKU: 120996

Etiquetas: 1989 1990 1991 ATV Moto 4 Models Powersports Yamaha YFM 250 Moto-4

Variantes de producto

Descripción

This manual covers the YFM 250 Moto-4 All-Terrain Vehicle (ATV) produced for the 1989, 1990, and 1991 model years. Known for engineering quality and reliability, the YFM 250 Moto-4 was a capable machine designed for both recreational trail riding and utility tasks. Its robust construction and user-friendly design, featuring a 5-speed transmission with an automatic clutch and shaft drive, made it a popular choice for riders seeking dependable performance in varied off-road conditions. The Moto-4 lineage represents a strong heritage in the powersports industry, offering a blend of durability and practical functionality. This factory repair manual provides comprehensive guidance for the service, maintenance, and repair of the YFM 250 Moto-4. It is meticulously organized to assist owners, mechanics, and technicians, covering all essential systems including the engine, cooling, fuel, drivetrain, chassis, electrical, and braking systems. Detailed step-by-step repair procedures, diagnostic information, and extensive diagrams and illustrations are included to facilitate efficient troubleshooting and accurate repairs. The manual also outlines periodic maintenance schedules and specifications, ensuring the YFM 250 Moto-4 remains in optimal working condition throughout its service life.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

YFM 250 Moto-4

Model Variant:

Moto-4

Years Covered:

1989, 1990, 1991

Vehicle Type:

All-Terrain Vehicle (ATV)

👋 Introduction

Market Position

Target Audience:

Yamaha YFM 250 Moto-4 owners, technicians, and enthusiasts

Competitive Analysis

Key Differentiator:

Enhanced PDF features (bookmarks, sub-bookmarks), comprehensive coverage, instant download, cross-platform compatibility

Key Features

Ease Of Use:

Designed to avoid sifting through hundreds of pages due to organized structure and digital indexing

Authenticity:

Represents the same manual used by factory-trained mechanics

Value Proposition

Satisfaction Guarantee:

Satisfaction guaranteed or money back

📋 Manual Details

Coverage Areas

Manual Type:

Factory Repair Manual

Primary Coverage:

Service, maintenance, and repair

Language:

English

Format:

Improved PDF (Bookmarks, Sub-bookmarks, Index)

Digital Features:

Printable pages, Backup CD burnable

Compatibility:

All Windows, All Mac, All Linux

Download Availability:

Instant Download

Page Count

Estimated Pages:

Hundreds

📖 Manual Coverage

Systems Covered

Engine:

Complete engine service, overhaul, and diagnostics

Cooling System:

Radiator, hoses, thermostat, fan (if applicable), coolant specifications

Fuel System:

Carburetor (or Fuel Injection System as stated), fuel pump, fuel lines, filter replacement

Drive Train:

Transmission, final drive, driveshaft, differential (if applicable), clutches

Chassis:

Frame, suspension (front and rear), steering system, wheels, tires

Electrical System:

Battery, charging system (stator, rectifier/regulator), ignition system, starter, lighting, instruments

Brakes:

Hydraulic system (master cylinder, calipers, lines), brake pad replacement, bleeding procedures

Bodywork:

Body panels, fenders, seat, handlebars, controls

Procedures Included

General Information:

Vehicle identification, safety precautions, shop practices

Periodic Checks Adjustments:

Scheduled maintenance, fluid level checks, cable adjustments, chain tensioning

Troubleshooting:

Diagnostic procedures for common problems, symptom-based troubleshooting guides

Repair Procedures:

Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation

Technical Depth:

Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts

Diagrams Illustrations:

Extensive diagrams and illustrations for clarity

📊 Manual Specifications

File Format

File Type:

Searchability:

Searchable text within PDF

Print Quality

Printability:

High-quality printable pages

Binding Type

Binding Type:

Digital (N/A for physical binding)

Paper Type

Paper Type:

Digital (N/A for physical paper type)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Four-stroke, SOHC, Air-Cooled (typical for this era and model)

Displacement:

230cc to 246cc (typical for a 250cc class engine of this period)

Bore X Stroke:

Specific values to be found in the manual (e.g., 66.0 mm x 70.0 mm for similar Yamaha engines)

Compression Ratio:

Specific values to be found in the manual (e.g., 9.2:1)

Performance

Horsepower:

Estimated 15-20 HP (typical for class, specific value in manual)

Torque:

Specific values to be found in the manual

Fuel System

Fuel Delivery:

Carburetor (Mikuni VM series common for this model, e.g., VM26SS)

Carburetor Size:

Specific size to be found in the manual (e.g., 26mm)

Recommended Fuel:

Unleaded gasoline (Octane rating to be specified in manual)

🔧 Transmission

Standard

Transmission Type:

5-speed manual with automatic clutch (Torque-Shift System)

Optional

Optional Transmission:

Features

Drive:

Shaft drive to rear wheels (typical for Moto-4 series)

Gear Ratios:

Detailed gear ratios provided in the manual

Transmission Fluid Type:

Yamaha's recommended gear oil or equivalent (specific type and quantity in manual)

📐 Dimensions

Exterior

Overall Length:

Specific dimensions available in manual

Overall Width:

Specific dimensions available in manual

Overall Height:

Specific dimensions available in manual

Weights

Dry Weight:

Approximately 200-220 kg (typical for model, specific value in manual)

Fuel Capacity:

Approximately 9-10 Liters (typical for model, specific value in manual)

Towing Capacity:

N/A for this model classification

🛡️ Safety Features

Ratings

Safety Ratings:

Not typically rated by agencies like NHTSA or IIHS for ATVs of this era

Active Features

Braking System:

Dual front disc brakes, single rear drum or disc brake

Lighting:

Headlight, taillight, brake light

Passive Features

Chassis Design:

Robust frame construction for off-road use

Operator Controls:

Ergonomic handlebar and control layout

💡 Technology Features

Infotainment

Infotainment System:

N/A (Basic instrumentation: speedometer, odometer, neutral indicator, high beam indicator)

Driver Assistance

Driver Assistance Features:

Connectivity

Connectivity Features:

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 3,000 km or 6 months (specifics in manual)

Air Filter Cleaning:

Recommended at regular intervals, depending on operating conditions (e.g., every 1,000 km)

Spark Plug Replacement:

Specific interval provided in manual (e.g., every 10,000 km)

Fluid Specifications

Engine Oil Type:

Yamalube 4 (or equivalent SAE 10W-30 or 20W-40 API SE or SF) - specific viscosity based on ambient temperature

Engine Oil Capacity:

Approximately 1.7 - 1.9 Liters (with filter change) - specific value in manual

Coolant Type:

Ethylene glycol based antifreeze (50% mixture with distilled water) - specific type and capacity in manual

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid

Known Issues

Common Wear Items:

Brake pads, tires, battery, carburetor adjustments, suspension bushings

Carburetor Performance:

Can require periodic cleaning and adjustment due to fuel quality or debris ingress

Electrical Connections:

Corrosion in connectors can lead to intermittent electrical faults, especially in wet environments

📚 Vehicle History

Brand Heritage

Brand History:

Yamaha Corporation is a Japanese multinational corporation that manufactures a wide range of products, including motorcycles, musical instruments, and powersports vehicles. They have a long-standing reputation for quality and innovation in the ATV market.

Model Evolution

Moto 4 Lineage:

The Moto-4 series was Yamaha's line of utility and recreational ATVs in the late 1980s and early 1990s, known for their reliability and capable performance. The YFM 250 was a popular mid-size offering.

Production

Production Period:

The YFM 250 Moto-4 was produced for several years, with the manual covering the 1989-1991 model years. It was part of a broader generation of Yamaha ATVs.

🏆 Awards & Recognition

Recognitions

Market Reputation:

The Yamaha Moto-4 series was generally well-regarded for its durability and performance in its class during its production run.