2006 Yamaha YZ450F(W) Service Manual (P/N 2S2-28199-81)

• Official Yamaha publication P/N 2S2-28199-81, first edition July 2006
• Covers the 2006 Yamaha YZ450F(W) liquid-cooled motocross competition series, including North American, European, and Oceanian market variants
• Serves as the foundational 650-page OEM documentation for the 2S2-series launch architecture, detailing engine, chassis, electrical, and fuel-tuning specifications
• Features 120+ mechanical exploded-view diagrams, extensive torque-check point charts, and schematics for the CDI ignition

Operational and Maintenance Documentation

This service manual delivers the technical data required to maintain and inspect the YZ series racing platforms. It outlines fundamental inspection routines and breaks down the exact layout of the factory literature, making it easier to navigate systems like the constant-mesh 5-speed transmission and the liquid cooling assembly. You get complete reference material for the CDI-based ignition system. The documentation transitions logically from identifying model-specific labels to preparing the 449 cm3 power plant for off-season storage. Working on high-performance motocross machinery requires strict adherence to factory tolerances. Always verify torque values with calibrated equipment and utilize appropriate safety gear when handling fluids or inspecting pressurized systems.

Specifications and Reference Data

Hard data drives shop efficiency. This manual provides comprehensive torque-check point maps for the cylinder head, balancer, and suspension linkages. Mechanics rely on these exact figures to ensure structural integrity across the frame and engine mounts. Fluid specifications are clearly defined, listing the coolant system capacity at 0.99 liters. Need to check the top end? The cylinder head specification table lists intake valve clearance precisely at 0.10–0.15 mm. Electrical diagnostics are just as straightforward, pinning the magneto pick-up coil resistance between 248 and 372 ohms. Finally, extensive reference tables dictate the exact wear limits for camshaft runout, piston ring end gaps, and clutch friction plate thicknesses to help you make accurate replacement decisions.