This manual covers the Yamaha WR426F, a robust off-road motorcycle produced from 2000 to 2008. As part of Yamaha's esteemed WR series, known for its racing heritage and performance in enduro and motocross disciplines, the WR426F features a powerful 426cc 4-stroke liquid-cooled engine, a 5-speed manual transmission with a wet multi-plate clutch, and hydraulic disc brakes front and rear. The first-generation model is celebrated for its engineering quality and reliability, bridging the gap in displacement for competitive off-road riding.
This comprehensive workshop repair service manual is designed to provide factory-level repair and diagnostic information. It meticulously details all aspects of the WR426F, including engine systems (fuel, cooling, lubrication, crankshaft, transmission), chassis systems (wheels, brakes, suspension, steering, frame), and electrical systems. The manual includes scheduled maintenance, routine servicing, disassembly, assembly, reinstallation, troubleshooting, and fault diagnosis, with hundreds of pages of detailed diagrams and information to assist owners and technicians in maintaining and repairing the vehicle effectively.
Product Name:
Yamaha WR426 WR426F 2000-2008 Workshop Repair Service Manual PDF Download
Generation:
First Generation
Engine Code:
426cc 4-stroke
Target Audience:
Yamaha WR426F owners, motorcycle technicians, repair shops
Value Proposition:
Provides professional-grade, comprehensive repair and maintenance information to save time and money on vehicle upkeep.
Competitor Manuals:
This is the same official factory manual used by local service/repair shops, often surpassing third-party manuals in accuracy and detail.
Accuracy Completeness:
Guaranteed complete and intact, without missing or corrupt parts/pages, same as professional shop manuals.
Ease Of Use:
Easy-to-use numbered instructions, bold figure numbers, numbered table of contents for quick information retrieval.
Digital Advantage:
PDF format allows for easy printing of specific sections, keeping hands clean, and instant access without shipping delays.
Detail Level:
Detailed substeps, notes, cautions, warnings, hundreds of pages of diagrams and detailed information.
Years Covered:
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Models Covered:
All WR426F models
Variants Covered:
All engine types, trim levels, and transmission types
Estimated Page Count:
Hundreds of pages (specific count not provided but indicated as comprehensive)
Type:
Workshop Repair Service Manual
Engine Systems:
Fuel system, cooling system, engine top end, engine lubrication system, crankshaft, transmission
Chassis Systems:
Wheels/tires, final drive, brakes, suspension, steering, frame
Electrical Systems:
Electrical system, wiring diagrams
General Information:
General information, appendices
Maintenance Procedures:
Scheduled maintenance, routine servicing, cleaning
Repair Procedures:
Disassembly, assembly, reinstallation, specific component repair (engine top end, clutch, transmission, etc.)
Diagnostic Procedures:
Troubleshooting, fault diagnosis, electrical system diagnostics
Performance Tuning:
Implied coverage for carburetor adjustment, exhaust tuning, and potentially suspension setup.
Depth:
Comprehensive factory-level repair and diagnostic information for professional technicians and advanced DIY users.
Diagrams Illustrations:
Includes detailed diagrams, drawings, and photos, with enlarged inset views for intricate parts.
Searchable:
Implied by PDF format and professional quality
Printable:
Yes, full printable
Zoom Functionality:
Yes, zoom in/out
Binding:
N/A (Digital PDF Download)
Paper Type:
N/A (Digital PDF Download)
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Compatibility:
All Versions of Windows & Mac
Displacement:
426cc (approximate, specific bore/stroke not detailed in product info)
Cooling System:
Liquid-cooled
Horsepower:
Refer to manual for specific figures (typical for this era ~45-50 HP range)
Torque:
Refer to manual for specific figures
Fuel Delivery:
Carburetor (specific model like Keihin FCR likely)
Fuel Type:
Unleaded gasoline
Engine Lubrication System
Oil Type:
Refer to manual for specific Yamalube or equivalent JASO MA certified oil specifications.
Oil Capacity:
Refer to manual for specific capacity
Valve Train:
DOHC (Double Overhead Camshaft), 4 valves
Piston Type:
Refer to manual for specific piston specifications
Clutch Type:
Wet multi-plate
Transmission Fluid:
Refer to manual for specific transmission fluid type and capacity.
Dimensions:
Refer to manual for specific overall dimensions (length, width, height), seat height.
Dry Weight:
Refer to manual for specific dry weight (typically around 250-260 lbs).
Wet Weight:
Refer to manual for specific wet weight.
Safety Ratings:
N/A (Off-road motorcycle, not subject to standard automotive safety ratings)
Braking System:
Hydraulic disc brakes (front and rear)
Lighting:
Headlight, taillight, brake light
Infotainment System:
N/A (Off-road motorcycle focus)
Electronic Aids:
N/A (Mechanical focus)
Connectivity Features:
N/A (Off-road motorcycle focus)
Oil Change Interval:
Refer to manual for specific mileage/hour recommendations based on riding conditions.
Air Filter Cleaning:
Refer to manual for specific cleaning/replacement intervals.
Spark Plug Replacement:
Refer to manual for specific replacement intervals and spark plug part number (e.g., NGK).
Engine Oil Spec:
Yamalube 4-AT (or equivalent JASO MA certified 10W-40 or 20W-50, consult manual for exact viscosity based on temperature).
Coolant Spec:
Ethylene glycol-based coolant (50% mixture with distilled water), refer to manual for specific type.
Brake Fluid Spec:
DOT 3 or DOT 4 hydraulic brake fluid, consult manual for exact specification.
Common Wear Items:
Clutch wear, piston ring wear, chain and sprockets wear, fork seal leaks, carburetor jetting issues (depending on altitude/fuel).
Electrical Issues:
Occasional stator or regulator/rectifier issues, though generally robust.
Engine Maintenance:
Regular valve clearance checks and adjustments are crucial for optimal performance and longevity.
Manufacturer Heritage:
Yamaha Motor Company is a Japanese manufacturer renowned for its motorcycles, musical instruments, and other powered products, with a long history of innovation and performance.
Model Lineage:
The WR426F replaced the WR400F and was a key model in Yamaha's off-road competition lineup, later succeeded by the WR450F. It bridged the gap in displacement for enduro and motocross racing.
Production Period:
2000-2008
Manufacturing Location:
Japan (Typical for Yamaha motorcycles)
Racing Success:
Yamaha's WR series has a strong racing pedigree in off-road disciplines like enduro and motocross, indicating inherent performance and durability.
Owner Satisfaction:
Refer to owner forums and reviews for specific model satisfaction data.
