Yamaha WR250 Parts Manual Catalog 1991

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Typ: Motorcycle

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Art.-Nr: 128546

Stichworte: 1991 Marine Motorcycle Sterndrive WR250 Yamaha

Produktvarianten

Beschreibung

The 1991 WR250 is a distinguished off-road motorcycle, part of the renowned WR series, known for its competitive performance and durability in demanding terrains. Engineered with a robust two-stroke, single-cylinder engine, typically around 239cc to 249cc and liquid-cooled, this model embodies a legacy in off-road racing. Its design focuses on delivering power and agility, making it a capable machine for enthusiasts and competitors alike. This comprehensive English parts catalog provides detailed exploded diagrams and manufacturer part numbers for all components of the 1991 WR250. It serves as an essential resource for owners, mechanics, and restorers, facilitating accurate part identification, replacement, and assembly. The manual covers all major systems, including engine, drivetrain, chassis, electrical, and bodywork, ensuring that every aspect of the motorcycle can be maintained or repaired with precision.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

WR250

Model Year:

Product Type:

Parts Manual Catalog

👋 Introduction

Market Position

Target Audience:

Yamaha WR250 owners, mechanics, parts suppliers, restorers, and enthusiasts.

Competitive Analysis

Value Proposition:

Comprehensive digital parts catalog with exploded diagrams, offering essential information for maintenance and repair at an accessible price point via instant download.

Key Features

Diagram Quality:

High-quality exploded diagrams illustrating part relationships and assemblies.

Part Number Inclusion:

Contains every manufacturer part number for precise part identification and ordering.

Download Availability:

Instant download access, eliminating shipping costs and wait times.

Ease Of Use:

Designed for ease of use with a clear layout and searchable PDF format.

📋 Manual Details

Coverage Areas

Primary Coverage:

All parts and assemblies for the 1991 Yamaha WR250

Secondary Coverage:

Includes diagrams and manufacturer part numbers for disassembly and reassembly guidance.

Page Count

Estimated Page Count:

Not specified, but detailed enough for every part.

Manual Type

Type:

Parts Catalog / Parts List Manual

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine Components:

Cylinder, piston, crankshaft, valves, camshafts, lubrication system, cooling system (if applicable), carburetor, exhaust system.

Drivetrain Components:

Transmission gears, shift forks, clutch assembly, chain and sprockets, drive shafts.

Chassis Components:

Frame, subframe, swingarm, shock absorber(s), front forks, steering components, linkages.

Wheel And Tire Components:

Rims, spokes, hubs, bearings, brake discs, brake calipers, master cylinders, levers.

Electrical Components:

Wiring harness, ignition system components, lighting, switches, battery (if applicable), CDI unit.

Bodywork And Controls:

Fuel tank, seat, fenders, handlebars, control cables, footpegs, levers, pedals.

Procedures Included

Assembly Disassembly:

Detailed exploded diagrams provide visual guidance for part identification and assembly/disassembly sequencing.

Part Identification:

Explicit manufacturer part numbers for all components, facilitating accurate ordering and replacement.

Technical Depth

Depth:

Component-level detail, suitable for mechanics and enthusiasts performing part replacement, restoration, or detailed inventory.

📊 Manual Specifications

File Format

Compatibility:

PC & MAC Compatible

Windows Compatibility:

Works with all versions of Windows

Print Quality

Printability:

Print what you need when you need it.

View Enlargement:

Enlargeable views for even the smallest parts.

Binding Type

Binding:

Digital Download (PDF)

Paper Type

Paper Type:

N/A (Digital)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Two-stroke, single-cylinder (typical for WR250 of this era)

Displacement:

Approximately 239cc to 249cc (specific to WR250 variant, manual will confirm exact)

Cooling System:

Liquid-cooled (typical for WR250)

Bore X Stroke:

Refer to manual for precise specifications.

Performance

Horsepower:

Typically in the range of 30-40 HP (estimated, manual will provide exact if available in diagrams).

Torque:

Refer to manual for precise specifications.

Fuel System

Fuel Delivery:

Carburetor (e.g., Mikuni VM series, specific model detailed in manual)

Fuel Type:

Unleaded gasoline (premix of oil and gasoline required for two-stroke)

🔧 Transmission

Standard

Transmission Type:

Constant mesh, 6-speed sequential (typical for WR250)

Optional

Optional Transmission:

Features

Clutch Type:

Wet, multi-plate (manual will specify exact type and components)

Final Drive:

Chain drive (manual will detail sprockets and chain components)

📐 Dimensions

Exterior

Overall Length:

Refer to manual for precise dimensions.

Overall Width:

Refer to manual for precise dimensions.

Overall Height:

Refer to manual for precise dimensions.

Weights

Dry Weight:

Refer to manual for precise weight specifications.

🛡️ Safety Features

Ratings

Safety Certification:

N/A (Parts manual does not typically include safety ratings).

Active Features

Braking System Front:

Disc brake, hydraulic (manual will detail caliper, master cylinder, disc part numbers)

Braking System Rear:

Disc brake, hydraulic (manual will detail caliper, master cylinder, disc part numbers)

Passive Features

Suspension Front:

Telescopic forks, oil-damped (manual will detail fork internals, seals, springs)

Suspension Rear:

Monoshock, linkage-actuated, adjustable (manual will detail shock unit, linkages, bearings)

💡 Technology Features

Infotainment

Infotainment System:

N/A (Typical for off-road motorcycles of this era; focus is on mechanical and electrical systems).

Driver Assistance

Driver Assistance Features:

N/A (Off-road focused).

Connectivity

Connectivity Features:

N/A (Off-road focused).

🔧 Maintenance

Service Intervals

Tune Up Intervals:

While this is a parts manual, understanding component wear based on mileage/hours is crucial. The manual aids in identifying and replacing worn parts.

Fluid Specifications

Engine Oil:

Two-stroke pre-mix ratio and type (e.g., Yamalube 2, specified in owner's manual, but oil seals and pump components are in this parts manual).

Transmission Oil:

Yamaha recommends specific grades for transmission lubrication (e.g., Yamalube 10W-30 or similar, parts manual will show seals and filters).

Fork Oil:

Specific viscosity and type of fork oil required for front suspension (parts manual will show fork internals).

Coolant:

If liquid-cooled, a specific coolant mixture is required (parts manual will show radiator, hoses, seals).

Known Issues

Common Wear Items:

Piston rings, spark plug, air filter, clutch plates, chain and sprockets, wheel bearings, suspension seals, brake pads are common wear items addressed by this manual.

Carburetor Maintenance:

Carburetor jets, needles, and seals are critical for optimal performance; this manual details all associated parts.

📚 Vehicle History

Brand Heritage

Brand Focus:

Yamaha is renowned for its performance motorcycles, particularly in off-road and racing applications.

Model Evolution

Model Lineage:

The WR series is Yamaha's lineage of potent off-road and enduro motorcycles, built for competitive performance.

Production

Production Era:

The WR250 model has a long production history, with significant updates and variations throughout the years. 1991 represents a specific iteration.

🏆 Awards & Recognition

Recognitions

Industry Recognition:

While specific awards for the 1991 WR250 are not detailed in a parts manual, the WR lineage is consistently recognized for its competitive prowess in off-road racing and events.