2008 Yamaha WR450F(X) Owner's Service Manual

2008 Yamaha WR450F(X) Technical Documentation

• Covers 2008 Yamaha WR450F(X) motocross competition machines, including Canadian, Australian, New Zealand, and South African market variants
• Original OEM publication P/N 5TJ-28199-71, first edition June 2007
• Contains over 100 exploded-view diagrams, torque tables, and cable routing schematics for assembly and inspection
• Delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Stored against your account so you can retrieve it after a hard-drive loss
• No DRM restrictions on the print function
• This 2008 first edition provides the primary technical foundation for the Yamaha WR450F(X) build, serving as the factory-authorized reference for maintenance and setup

Component and Maintenance Scope

This 2008 Yamaha WR450F(X) service publication documents general specifications, regular inspection intervals, and tuning parameters for the high-performance racing motorcycle. Sections detail engine systems including the FCR-MX39 carburetor, cylinder head, valvetrain, and transmission, as well as chassis components such as the semi-double cradle frame, link-type monoshock suspension, and front/rear hydraulic disc brake systems.

Additional chapters define procedures for electrical system diagnostics, including CDI unit checks, stator output values, and charging system circuits. The text establishes strict criteria for component wear limits, such as valve clearance thresholds and piston ring end gaps, while providing detailed lubrication diagrams and routing instructions for throttle, clutch, and hot-start cables.

Specification Highlights

Engine coolant capacity is documented at 1.0 liters. Intake valve clearance for the 2008 Yamaha WR450F(X) is listed at 0.10–0.15 mm in the maintenance specification table. The front fork oil level for the 2008 Yamaha WR450F(X) is set to 132 mm for Canadian units. Compression ratio for this liquid-cooled DOHC engine is 12.3 : 1. The main jet calibration is standard at #162 per the carburetor tuning chart. An official 220-page Yamaha OEM service manual covering the 2008 WR450F(X) model, documenting engine, chassis, electrical, and fuel-tuning specifications for the 5TJ-series build.