Yamaha WR250 Replacement Parts Manual 1994

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Tipo: Motorcycle

Proveedor:

SKU: 130260

Etiquetas: 1994 Marine Motorcycle Sterndrive WR250 Yamaha

Variantes de producto

Descripción

This manual covers the Yamaha WR250, a celebrated off-road motorcycle renowned for its robust performance and engineering prowess. Produced in 1994, this model represents a mature iteration of the WR series, which evolved from the competitive YZ motocross platform. The WR250 is designed for demanding off-road conditions, offering a potent 2-stroke, liquid-cooled engine with a displacement of approximately 239cc to 249cc, typically featuring a 6-speed transmission and a wet, multi-plate clutch. Its reputation is built on an extensive heritage in motorcycle manufacturing, known for reliability and competitive capability in various off-road disciplines. This comprehensive Parts Catalog/Manual in English provides detailed exploded diagrams and part numbers for the 1994 Yamaha WR250. Its primary function is to facilitate precise identification of all original components, aiding in the disassembly and reassembly of the motorcycle. The manual covers all major systems, including the engine, fuel, exhaust, cooling, transmission, chassis, suspension, brakes, wheels, electrical system, controls, and bodywork. It is an invaluable resource for owners, mechanics, and parts suppliers, enabling accurate part sourcing and supporting independent maintenance efforts by offering clear visualization of component relationships and part numbers.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

WR250

Year:

Product Type:

Replacement Parts Manual

Product Format:

Digital (PDF)

👋 Introduction

Market Position

Target Audience:

Yamaha WR250 owners, mechanics, and parts suppliers seeking to identify and source OEM components.

Value Proposition:

Enables cost savings by facilitating independent part sourcing and DIY repairs.

Competitive Analysis

Vs Dealerships:

Offers an alternative to expensive OEM dealership parts catalogs and direct ordering.

Vs Aftermarket:

Crucial for identifying exact OEM specifications for compatibility and quality assurance.

Key Features

Illustrations:

Extensive use of illustrated exploded diagrams for component visualization.

Part Number Listing:

Complete listing of all Yamaha genuine part numbers.

Ease Of Use:

Designed for straightforward understanding and application by a wide range of users.

📋 Manual Details

Coverage Areas

Overall Coverage:

Comprehensive parts identification for the 1994 Yamaha WR250.

Page Count

Estimated Page Count:

Not specified, but typically 100-200 pages for this type of manual.

Manual Type

Type:

OEM Parts Catalog/Manual

Language

Language:

English

Format

File Format:

Compatibility:

All PC & MAC Computers

Downloadability:

Instant download after payment

Requirements

Software Requirement:

Adobe PDF Reader

📖 Manual Coverage

Systems Covered

Engine Assembly:

Detailed breakdown of engine components, including cylinder, piston, crankshaft, and valve train.

Fuel System:

Carburetor, fuel tank, fuel lines, and related components.

Exhaust System:

Exhaust pipe, silencer, and mounting hardware.

Cooling System:

Radiator, hoses, fan (if applicable), and coolant related parts.

Transmission And Drivetrain:

Gearbox components, clutch assembly, shift mechanism, and final drive (chain, sprockets).

Chassis And Frame:

Frame components, subframes, swingarm, and linkages.

Suspension Front:

Front forks, triple clamps, steering stem, and related components.

Suspension Rear:

Rear shock absorber, linkage, swingarm pivots, and bearings.

Brakes Front:

Brake caliper, master cylinder, brake lever, brake disc, and pads.

Brakes Rear:

Rear brake caliper, master cylinder, brake pedal, brake disc, and pads.

Wheels And Tires:

Rims, spokes, hubs, bearings, and tire valve stems.

Electrical System:

Ignition system, lighting (headlight, taillight, signals), stator, CDI unit, wiring harnesses, and switches.

Controls:

Handlebars, levers, cables, footpegs, and control linkages.

Bodywork And Plastics:

Fairings, fenders, fuel tank cover, seat assembly, and mounting hardware.

Tools And Accessories:

Includes common tools and any specific tools required for assembly/disassembly.

Procedures Included

Disassembly:

Provides visual guidance via exploded diagrams for step-by-step disassembly of components.

Assembly:

Facilitates correct reassembly of the motorcycle by identifying correct part placement and order.

Part Identification:

Primary function is precise identification of all original Yamaha parts.

Technical Depth

Detail Level:

Highly detailed, listing individual fasteners, seals, bearings, and small components.

Diagram Clarity:

Illustrated exploded diagrams are clear and easy to follow.

Part Numbering:

Each part is assigned a specific Yamaha OEM part number for ordering.

Scope:

Focuses exclusively on parts and their relationships, not repair procedures or specifications (like torque values).

📊 Manual Specifications

File Format

File Type:

Searchability:

Likely text-searchable if the PDF was created from a well-formatted source, allowing quick lookups by part name or number.

Print Quality

Printable:

Yes, user can print specific pages or the entire document.

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

2-Stroke, Liquid-Cooled, Reed Valve, Case Reed Induction (typical for WR250 of this era).

Bore X Stroke:

Typically around 66.4 mm x 72.0 mm (specific to WR250 model variant, e.g., WR250Z).

Displacement:

Approximately 239cc - 249cc (exact displacement depends on the specific WR250 variant).

Compression Ratio:

Typically around 6.0:1 to 7.0:1 for racing 2-strokes.

Performance

Horsepower:

Estimated 40-50 HP (highly dependent on specific tuning and variant).

Torque:

Estimated 25-30 lb-ft (highly dependent on specific tuning and variant).

Fuel System

Carburetor:

Typically a large-bore Mikuni VM series (e.g., VM38 or VM36).

Fuel Type:

Unleaded gasoline with appropriate octane rating (e.g., 91+).

Fuel Mixture:

Requires pre-mixing of oil with gasoline (2-stroke oil).

🔧 Transmission

Standard

Type:

6-speed constant mesh, manual clutch.

Gear Ratios:

Specific gear ratios are not provided in the manual's description but are detailed in full service manuals.

Features

Clutch Type:

Wet, multi-plate.

Final Drive:

O-ring sealed chain.

📐 Dimensions

Exterior

Overall Length:

Not specified in product description, but typical for a motocross/enduro bike.

Overall Width:

Not specified in product description.

Overall Height:

Not specified in product description.

Weights

Dry Weight:

Approximately 230-250 lbs (104-113 kg) depending on specific WR250 variant.

Wet Weight:

Not specified, but adds fluids (coolant, oil, fuel).

🛡️ Safety Features

Ratings

Safety Certifications:

N/A (Motorcycle specific safety standards apply, not typically rated like cars).

Active Features

Braking System:

Hydraulic disc brakes front and rear for strong stopping power.

Passive Features

Lighting:

Headlight, taillight, brake light for visibility.

💡 Technology Features

Infotainment

Features:

N/A (Analog instrumentation: speedometer, tachometer, odometer, basic indicator lights).

Driver Assistance

Features:

N/A (No electronic rider aids like ABS or traction control).

Connectivity

Features:

N/A (No digital connectivity features).

🔧 Maintenance

Service Intervals

Oil Change:

Frequent oil changes recommended for 2-stroke engines, typically every few rides or hours of use.

Air Filter:

Regular cleaning or replacement of the air filter is crucial for engine longevity.

Spark Plug:

Spark plug inspection and replacement at regular intervals based on usage.

Fluid Specifications

Engine Oil:

Specific 2-stroke premix oil meeting JASO FD or higher rating recommended by Yamaha.

Transmission Oil:

Yamaha's recommended motorcycle gear oil or equivalent (e.g., SAE 10W-30 or 10W-40).

Coolant:

Ethylene glycol-based anti-freeze and coolant mixture, typically a 50/50 blend with distilled water.

Known Issues

2 Stroke Wear:

Piston rings, cylinder wear, and crankshaft seals are common wear items in high-performance 2-stroke engines requiring periodic inspection and replacement.

Carburetor Maintenance:

Carburetor cleaning and jetting adjustments are often necessary due to fuel variations and engine use.

Suspension Seals:

Fork seals and shock seals can degrade over time, leading to leaks and requiring replacement.

📚 Vehicle History

Brand Heritage

Yamaha Motorcycles:

Yamaha has a long-standing reputation for producing high-performance motorcycles across various disciplines, including motocross and off-road racing.

Model Evolution

Wr Series:

The WR series evolved from Yamaha's successful YZ motocross bikes, often featuring wider gear ratios, lights, and suspension tuned for off-road endurance and trail riding.

1994 Context:

The 1994 model year would have represented a mature iteration of the WR250 platform, likely benefiting from refinements from previous years.

Production

Manufacturing Location:

Primarily Japan.

🏆 Awards & Recognition

Recognitions

Model Recognition:

Yamaha WR models are generally well-regarded in the off-road community for their performance and durability, often winning comparison tests and races.