Yamaha Timberwolf 2WD YFB250 ATV Complete Workshop Service Repair Manual 1992 1993 1994 1995 1996 1997 1998

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The Yamaha Timberwolf YFB250 is a capable 2WD utility ATV, produced from 1992 to 1998. Designed for both farm work and recreational trail riding, this model offers a user-friendly operation,...

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Tipo: Atv

Proveedor:

SKU: 94666

Etiquetas: 1992 1993 1994 1995 1996 1997 1998 ATV Powersports Timberwolf 2WD Timberwolf Models Yamaha YFB250

Variantes de producto

Descripción

The Yamaha Timberwolf YFB250 is a capable 2WD utility ATV, produced from 1992 to 1998. Designed for both farm work and recreational trail riding, this model offers a user-friendly operation, a robust 230cc air-cooled engine, and a reliable shaft drive system. It stands as a practical and affordable option within the entry-level to mid-range utility ATV segment, competing with models such as the Honda TRX300 and Kawasaki Bayou 300. Its engineering emphasizes durability and straightforward maintenance, making it a trusted choice for various demanding tasks and outdoor adventures. This comprehensive workshop service repair manual provides detailed English-language guidance for the Yamaha Timberwolf YFB250. It covers all essential aspects of maintenance and repair, including engine overhaul, transmission service, drivetrain, suspension, braking, fuel, cooling, exhaust, and electrical systems. The manual includes step-by-step procedures for preventative maintenance, troubleshooting common issues with diagnostic flowcharts, and detailed repair instructions. Its scope extends from basic upkeep to complete component rebuilds, ensuring owners and technicians have the necessary information to maintain the vehicle's performance and longevity.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

Timberwolf

Model Code:

YFB250

Trim Level:

Codes

Chassis Code:

YFB250 (model years 1992-1998)

👋 Introduction

Market Position

Segment:

Entry-level to mid-range utility ATV segment.

Competitive Analysis

Competitors:

Honda TRX300, Kawasaki Bayou 300, Suzuki LT-F250 (QuadRunner).

Key Features

Features:

Reliable 2WD system, user-friendly operation, robust engine for its class, suitable for farm work, recreation, and trail riding.

📋 Manual Details

Coverage Areas

Language:

English

Format:

Downloadable PDF

Page Count

Estimated Pages:

Over 400

Manual Type

Type:

Complete Workshop Service Repair Manual

📖 Manual Coverage

Systems Covered

Engine Service:

Complete engine overhaul, carburetor tuning, piston and cylinder inspection, valve adjustment, timing procedures, oil pump, cooling system.

Transmission Service:

Gearbox disassembly and reassembly, clutch operation, shift mechanism, maintenance and repair.

Drivetrain Service:

Drive shaft, differential (if applicable), axle maintenance, U-joints.

Suspension Service:

Front and rear suspension component inspection, repair, and replacement, shock absorber service, wheel bearing maintenance.

Braking System:

Hydraulic brake system service, caliper and master cylinder repair, brake pad and shoe replacement, bleeding procedures.

Electrical System:

Wiring diagrams, ignition system, lighting, battery, starter, charging system, switches, troubleshooting.

Fuel System:

Fuel tank, fuel lines, fuel pump, carburetor cleaning and adjustment, fuel filter replacement.

Cooling System:

Radiator, fan, thermostat, water pump service, coolant specifications and procedures.

Exhaust System:

Muffler, exhaust pipes, inspection and replacement.

Body And Frame:

Body panel removal and installation, frame inspection, seat, handlebars, and controls.

Procedures Included

Preventative Maintenance:

Scheduled maintenance, lubrication points, fluid changes, filter replacements.

Troubleshooting:

Diagnostic flowcharts, common problem identification, symptom analysis.

Repair Procedures:

Step-by-step instructions for component removal, repair, and reinstallation.

Diagnostic Tests:

Procedures for testing electrical components, engine performance, and mechanical systems.

Technical Depth

Depth:

Comprehensive from basic maintenance to full engine and transmission rebuilds.

📊 Manual Specifications

File Format

File Type:

Searchability:

Searchable text content for quick information retrieval.

Print Quality

Quality:

High-resolution digital format, printable pages.

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

4-stroke, SOHC, air-cooled

Displacement:

230cc (229.6cc)

Bore X Stroke:

68.5 mm x 64.0 mm

Compression Ratio:

9.3:1

Performance

Horsepower Est:

Approx. 17-19 HP (varies slightly by year/tune)

Torque Est:

Approx. 15-17 lb-ft (varies slightly by year/tune)

Fuel System

Fuel Delivery:

Carburetor

Carburetor Model:

Mikuni VM26SS (typical)

Fuel Type:

Unleaded gasoline, minimum 87 octane

Ignition

Ignition System:

CDI (Capacitor Discharge Ignition)

Lubrication

Oil Type:

Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, or SG classification)

Oil Capacity:

1.7 L (1.8 US qt) with filter change

🔧 Transmission

Standard

Transmission Type:

5-speed manual with automatic clutch

Clutch Type:

Automatic centrifugal clutch

Drive:

2WD (Shaft Drive to Rear Axle)

Features

Reverse:

Gear Ratios:

Specific gear ratios detailed in manual.

Lubrication

Transmission Oil Type:

Yamalube Gear Oil (or equivalent SAE 80 API GL-4)

Transmission Oil Capacity:

0.55 L (0.58 US qt)

📐 Dimensions

Exterior

Length:

Approx. 1965 mm (77.4 in)

Width:

Approx. 1095 mm (43.1 in)

Height:

Approx. 1115 mm (43.9 in)

Wheelbase:

Approx. 1280 mm (50.4 in)

Weights

Dry Weight:

Approx. 217 kg (478 lbs)

Curb Weight:

Approx. 223 kg (492 lbs) with all fluids

Cargo

Front Rack Capacity:

10 kg (22 lbs)

Rear Rack Capacity:

20 kg (44 lbs)

Tires

Front Tire Size:

AT22x7-10

Rear Tire Size:

AT22x10-10

Wheels

Wheel Bolt Pattern:

4/110 mm

🛡️ Safety Features

Ratings

Safety Design:

Designed for off-road use; safety compliance generally follows ATV industry standards for the period.

Active Features

Braking System:

Hydraulic disc brakes front and rear, parking brake.

Passive Features

Lighting:

Dual headlights, tail light, brake light.

Operator Controls:

Ergonomic handlebar design, thumb throttle, easy-reach levers.

💡 Technology Features

Infotainment

Infotainment System:

N/A (Basic Utility Vehicle)

Driver Assistance

Assistance Features:

Connectivity

Connectivity Options:

🔧 Maintenance

Service Intervals

Engine Oil Change:

Every 1,000 km (600 miles) or 6 months, whichever comes first.

Air Filter Cleaning:

Every 500 km (300 miles) or 3 months, clean and re-oil.

Spark Plug Check:

Every 1,000 km (600 miles) or 6 months.

Brake Fluid Check:

Every 1,000 km (600 miles) or 6 months.

Valve Clearance Check:

Every 2,000 km (1,200 miles) or 12 months.

Fluid Specifications

Engine Oil Spec:

SAE 10W-30 API SE, SF, or SG

Transmission Oil Spec:

SAE 80 API GL-4

Brake Fluid Spec:

DOT 3 or DOT 4 Hydraulic Brake Fluid

Coolant Spec:

Ethylene glycol-based coolant (50/50 mix with distilled water)

Known Issues

Common Problems:

Carburetor jetting can be sensitive to altitude and temperature; occasional starter motor issues; wear on suspension bushings over time due to heavy use.

📚 Vehicle History

Brand Heritage

Heritage:

Yamaha has a long-standing reputation for producing reliable and durable recreational and utility vehicles, including a strong presence in the ATV market since the early 1980s.

Model Evolution

Evolution:

The Timberwolf YFB250 was introduced as a step up from smaller engine displacement ATVs, offering more power and utility. It was positioned as a practical and affordable option for various tasks and leisure activities.

Production

Production Years:

1992-1998

Manufacturing Location:

Primarily manufactured by Yamaha Motor Corporation.

🏆 Awards & Recognition

Recognitions

Industry Awards:

No specific major industry awards are widely documented for this model, but it was generally well-regarded for its reliability and value in its class.