2005 Yamaha WR250F(T) WR Series Owner's Service Manual (P/N 5UM-28199-52)

The 2005 Yamaha WR250F service manual delivers uncompromised technical insight into the complete machine. Whether you are dialing in the liquid-cooled DOHC single-cylinder engine or mapping out the electrical chassis, this document provides the exact factory data required for precision work. Note that high-performance off-road motorcycles require strict adherence to safety protocols; always verify baseline settings and wear appropriate protective gear before initiating any teardown.

This official 864-page Yamaha OEM publication (P/N 5UM-28199-52) structures content logically across core chapters. It gives you immediate access to general information, precise specifications, periodic maintenance schedules, and specific disassembly sequences. This 2004 first edition serves as the foundational service reference for the 2005 launch build and associated model variants.

System Coverage and Reference Data

Instead of generic overviews, this manual focuses heavily on operational checks, tuning parameters, and exact inspection procedures. It thoroughly documents the FCR-MX37 carburetor, kickstarter assembly, and the complex CDI ignition circuit.

Engine data goes deep into clearances, valve dimensions, and critical tolerances. For instance, you will find the exact piston-to-cylinder clearance (0.040–0.065 mm) alongside detailed multi-stage torque tables for the cylinder head bolts and the 5-speed transmission assembly. Electrical specifications are equally comprehensive, listing the CDI pickup coil resistance at 248–372 ohms (at 20 °C). Featuring 118 specific torque values and extensive exploded-view schematics, this reference leaves no room for guesswork during a rebuild.