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

Covers the 2007–2014 Yamaha WR250F and WR250FW. Yamaha's Owner's Service Manual, publication 5UM-28199-54, first edition dated August 2006, combines owner guidance with workshop repair procedures.

This 912-page PDF contains English, French, German, Italian and Spanish text in one file.

• Engine repair: Engine removal, camshaft and valve service, cylinder and piston inspection, crankcase separation, crankshaft installation and balancer inspection.

• Clutch and transmission: Wet-clutch replacement, transmission rebuilds, shift-cam and shift-fork inspection, plus kickstarter and starter-clutch service.

• Fuel and cooling: FCR-MX37 carburetor overhaul and tuning, accelerator-pump adjustment, air induction system maintenance, radiator pressure tests and water pump repair.

• Chassis and brakes: Front fork oil seal replacement, steering and swingarm service, suspension tuning, brake caliper and master-cylinder overhaul, and bleeding.

• Electrical diagnosis: CDI ignition, AC magneto, electric starting, charging, lighting and speedometer troubleshooting, with wiring diagrams and component test charts.

• Service references: Exploded-view assembly diagrams, torque-check points, maintenance schedules, fluid capacities, wear limits and component-specific clearance specifications.

Owners get operating and basic-maintenance guidance; the valve-adjustment, engine, chassis and electrical repair sections are intended for readers with existing knowledge and skill in Yamaha servicing.

Model Codes and Regional Equipment

WR250FW identifies the USA, Canada, Australia and New Zealand versions; WR250F identifies Europe and South Africa. Model codes are 5UME for the USA, 5UMF for Europe and 5UMG for Canada, Australia, New Zealand and South Africa. Machine identification covers VIN, engine serial number and model-label locations.

The specifications distinguish the 5UM-E0 CDI unit for the USA from 5UM-F0 elsewhere, alongside regional wheel, tire and suspension settings. USA/non-USA markings in the wiring diagram help you match the circuit to the machine before electrical diagnosis.

Engine Repair and Lubrication

The engine section 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.

The 249cc single-cylinder, liquid-cooled, 4-stroke engine has chain-driven DOHC camshafts. Coverage includes decompression-system inspection, cylinder bore measurements and intake/exhaust pad-selection tables for valve-clearance adjustment.

Crankcase procedures identify the separating tool YU-1135-A / 90890-01135 and dedicated crankshaft installation tools. Camshaft assembly notes explain how uneven cap-bolt loading can damage the cylinder head, caps and camshafts.

Lubrication diagrams trace the dry-sump system; repair coverage extends to the oil tank, strainers and trochoid oil pump. The clutch section distinguishes friction-plate positions and cushion-spring orientation; transmission procedures cover the 5-speed constant-mesh gearbox.

Carburetor, Air Induction and Cooling

Carburetor service includes float-height checks, jet-needle selection, accelerator-pump timing and leak-jet tuning. Symptom tables connect throttle-response problems with mixture settings and related checks. The air induction section tests air-cut valve operation with the specified vacuum/pressure pump gauge set.

Cooling coverage includes radiator-cap and system pressure tests, coolant replacement, and water-pump shaft, bearing and seal inspection. Water-pump reassembly notes address seal-lip damage and displacement of the seal spring during shaft installation.

Chassis, Brakes and Suspension Tuning

Suspension setting charts cover spring selection, sag, fork oil level and damping adjustments for front-fork and rear-shock symptoms. For chassis setup, the manual provides exact fork suspension oil capacities, brake disc tolerances, and wheel axle torque values. Torque-check points cover the frame, steering, suspension and brakes.

Rear-shock procedures cover removal, spring replacement and mounting-bearing service; oil or gas leaks call for replacement of the shock assembly. Observe the manual's high-pressure nitrogen warnings when handling this unit.

Electrical Tests and Wiring Diagrams

No-spark and no-crank flowcharts cover switches, relays, diodes and coils. Charging and lighting tests distinguish AC magneto coil faults from rectifier/regulator faults. Ignition references include the CR9E/NGK spark plug; electrical tables supply magneto output data and battery-voltage specifications.

Throttle position sensor coverage includes resistance tests, input-voltage checks and output-voltage adjustment. Separate procedures test the multi-function display and speed sensor. The wiring diagram, cable-routing diagrams and starting circuit cut-off diagram identify connections and wire colors for circuit tracing.

PDF Contents and Navigation

The total includes two cover pages, 24 preliminary and contents pages, 11 memo pages and two blank end pages. These pages are already included in the stated page count.

The body text is searchable; labels embedded in diagram images are not searchable. PDF bookmarks are organized by language and section, with some chapter entries opening contents pages. Small wiring-diagram labels require zooming for comfortable reading.