2007-2014 Yamaha WR250F(W) Service Manual (P/N 5UM-28199-54)

• Covers the 2007–2014 Yamaha WR250F and WR250FW, detailing service data for the 249cc single-cylinder, liquid-cooled, 4-stroke engine.
• Official Yamaha publication (P/N 5UM-28199-54), first edition dated August 2006, spanning 912 pages of foundational reference data.
• Includes 56 exploded-view assembly diagrams and 15 torque-check charts covering frame, steering, suspension, and brakes.
• Delivers precise technical specifications for the FCR-MX37 carburetor, CDI ignition system, and 5-speed constant-mesh transmission.
• Features comprehensive chapters covering regular inspection, suspension tuning, engine removal, crankcase separation, transmission rebuilds, AC magneto servicing, and electrical components.
• Provides specific guidance for air induction system maintenance, water pump overhauls, clutch replacement, balancer inspection, and extensive Wiring diagrams.

Essential Workshop Reference Data

This manual streamlines your workflow by providing immediate access to crucial machine identification, including engine serial locations and model codes. Rather than guessing, technicians can rely on exact factory data for routine inspection and maintenance intervals. The engine section breaks down the top end thoroughly. It details cam drive methods, valve train specifications, and piston-to-cylinder tolerances. You get the specific crankshaft dimensional data, timing chain specs, and valve clearance figures for both intake and exhaust components. It provides sequential, step-by-step instructions for complex procedures that typically require an expensive dealership visit, such as precise valve clearance adjustments, front fork oil seal replacements, and complete carburetor tuning. When executing a repair, having the exact factory clearances and sequential assembly order directly at your workbench prevents improper torque application on sensitive aluminum engine components, eliminating the costly risk of stripped threads. Always verify your equipment's current condition and observe standard workshop safety protocols before undertaking major engine teardowns. Working on high-performance motorcycles involves inherent risks; always depressurize the suspension and disconnect the battery before initiating any significant teardown to prevent personal injury. Getting this precise data loaded on your screen as a high-resolution PDF means less downtime on the lift and faster, more reliable turnarounds.

Chassis, Electrical and Dimensional Specs

The technical data section maps out the 77.00–77.01 mm cylinder bore range and confirms the coolant system capacity at 0.99 liters. Ignition specifics are clearly defined, including the 0.7–0.8 mm spark plug gap for the standard CR9E/NGK plug. For chassis setup, the manual provides exact fork suspension oil capacities, brake disc tolerances, and wheel axle torque values. Electrical troubleshooting is fully supported. You will find detailed AC magneto output figures, battery voltage baselines, and connector pinout reference values for the CDI unit to help diagnose complex ignition issues quickly. This official factory reference empowers you to tackle any repair with confidence and precision.

Equip your garage with the definitive factory specifications—secure your Yamaha WR250F service manual today.