Yamaha WR450F(X) WR450FX WR450F Off-Road Motorcycle 2008 - Complete Owner's Service Manual & Maintenance Guide
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Sample pages from the Yamaha WR450F(X) WR450FX WR450F Off-Road Motorcycle 2008 - Complete Owner's Service Manual & Maintenance Guide manual
Purchase Information
Technical Specifications
- Document Number / Seller:
- 24387 / Ashley Young
- File Size:
- 13.62 MB
- File Type:
- Language:
- English (some of our manuals are multi-language)
- Pages:
- 220
- Printable:
- Yes
- Estimated Download Time:
- 0.28 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Motorcycle
- Brand:
- Yamaha
- Reviewed and Approved:
- Dec 25, 2025
Yamaha Models and Parts Covered in this Motorcycle Manual
- WR450F(X) (2008)
- WR450FX (2008)
- WR450F (2008)
Complete Manual Information
Yamaha WR450F(X) 2008 - Complete Owner's Service Manual & Maintenance Guide
Keep your high-performance enduro in championship-winning condition with the official Yamaha WR450F(X) Owner's Service Manual. This is the definitive technical resource for the 2008 model year, providing the exact same specifications and procedures used by professional Yamaha technicians. Whether you are navigating tight woods on a WR450FX or competing on a closed course, this manual is your primary tool for reliability and peak engine performance.
Comprehensive Model Coverage
This manual is specifically designed for the following 2008 Yamaha WR series motorcycle combinations:
- WR450F(X) (2008)
- WR450FX (2008)
- WR450F (2008)
The model codes covered include 5TJK (Canada) and 5TJM (Australia, New Zealand, South Africa), ensuring you have the correct data for your specific region, including specialized settings for different global territories.
Professional-Grade Technical Features
- Total Engine Mastery: Complete teardown and assembly instructions for the 449cc liquid-cooled 4-stroke DOHC engine. Includes precise valve clearance specs (Inlet: 0.10–0.15 mm; Exhaust: 0.20–0.25 mm) and cylinder head warpage limits.
- Race-Ready Tuning: Advanced "Chapter 4: Tuning" section covers carburetor jetting for the Keihin FCR-MX39, including main jet (#162) and pilot jet (#45) configurations to adapt to any track condition.
- Chassis & Suspension: Full service details for the Kayaba (KYB) telescopic front forks and link-type Monocross rear suspension. Learn how to adjust oil levels (standard 132mm/125mm) and spring preload for your riding style.
- Detailed Electrical Systems: Troubleshooting for the CDI ignition, electric starting system, and the sophisticated multi-function display (Basic and Race modes).
- Maintenance Schedules: Factory-recommended intervals for oil changes, piston inspections, and valve train adjustments to extend the life of your machine.
Essential Serial Number Identification
For positive identification when ordering parts or in case of theft, this manual identifies the exact locations of your machine's unique identifiers:
- Vehicle Identification Number (VIN): Stamped on the right side of the steering head pipe.
- Engine Serial Number: Stamped on the elevated part of the right-side engine case.
- Model Label: Affixed to the frame under the rider's seat.
Detailed Specifications & Data
- Engine Type: Liquid cooled 4-stroke, forward-inclined single cylinder.
- Bore x Stroke: 95.0 x 63.4 mm.
- Compression Ratio: 12.3:1.
- Fuel Requirement: Premium unleaded gasoline (95 octane or higher).
- Transmission: Constant mesh 5-speed with wet, multiple-disc clutch.
- Tire Pressure: Standard 100 kPa (15 psi) for front and rear.
This manual replaces guesswork with factory-authorized precision. From routine oil changes to intricate crankshaft replacements, you will find every torque specification and exploded diagram needed to get the job done right. Don't hit the trail without the knowledge used by the pros.
Download Instructions for Yamaha Motorcycle Manual
Frequently Asked Questions - Yamaha Motorcycle Manual
Is this manual suitable for beginners?
Yes, this Yamaha manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Motorcycle maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (13.62 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your Yamaha Motorcycle manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Are engine specifications included?
This motorcycle service manual includes detailed engine specifications, valve clearances, torque settings, and performance data specific to your Yamaha model.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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