2007-2014 Yamaha WR250F(W) Service Manual

WR250F and WR250FW Technical Manual

• 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.
• Fully searchable OCR text layer lets you jump to any torque spec instantly.
• Available as an instant download so you can start wrenching immediately. Your file stays accessible in your account for life.

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. Always verify your equipment's current condition and observe standard workshop safety protocols before undertaking major engine teardowns, as these high-performance parts require strict adherence to factory tolerances to operate safely. Getting this precise data on your screen via instant download 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.