2008 Yamaha WR250F(X) Motorcycle Owner's Service Manual

Get your WR250F(X) back in top condition with this essential owner's service manual, covering engine, chassis, and electrical systems. Publication 5UM-28199-71.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Yamaha Models Covered & Key Technical Specifications

Models: WR250FX (USA, CDN, AUS, NZ), WR250F (ZA)
Sub-models / Variants: 5UMH (USA), 5UMK (CDN), 5UMM (AUS, NZ, ZA)
Build Years: 2008
Serial Numbers: 5UM-28199-71
Technical Data:

  • Engine displacement: 249 cm3
  • Engine type: Liquid cooled 4-stroke, DOHC, single cylinder, forward inclined
  • Compression ratio: 12.5:1
  • Lubrication system: Dry sump
  • Transmission type: Constant mesh, 5-speed
  • Starting system: Kick and electric starter
  • Carburetor type: FCR-MX37 KEIHIN
  • Coolant capacity: 0.99 L (0.87 Imp qt, 1.05 US qt)
  • Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
  • Tire pressure (front and rear): 100 kPa (1.0 kgf/cm2, 15 psi)
Technical Specifications
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Document Number / Seller:
30902 / Harold Young
File Size:
13.93 MB
File Type:
PDF
Language:
English
Pages:
222
Printable:
Yes
Category:
Bike
Last updated / verified
Jan 18, 2025

Yamaha Manual Features & Content Preview

Yamaha WR250F(X) 2008 Service Manual Overview

  • Covers 2008 Yamaha WR250F(X) models, including the WR250FX and WR250F variants with 5UMH, 5UMK, and 5UMM model codes
  • Official Yamaha publication P/N 5UM-28199-71, first edition July 2007
  • Contains 46 exploded-view assembly diagrams and 34 detailed torque specification tables
  • File is indexed for efficient navigation, allowing users to jump directly to specific system chapters
  • Accessible from your device as soon as the order is placed
  • Suitable for printing individual sections for shop-floor use
  • This 222-page technical reference provides the exact mechanical data required for the 2008 Yamaha WR250F(X) build, replacing earlier workshop documentation for this specific competition-ready series

Document Content and Structure

The 2008 Yamaha WR250F(X) service manual is structured into seven distinct chapters, spanning general machine identification to detailed electrical system diagnostics. It defines procedures for engine maintenance, chassis inspection, and performance tuning for competitive riding environments.

General chapters outline identification numbers, control functions, and the multi-function display settings, while the technical sections provide extensive coverage of the Keihin FCR-MX37 carburetor, including needle jet, pilot jet, and leak jet tuning. The electrical chapter presents wiring diagrams, ignition system component testing, and starter motor service parameters for the electric starting system.

Specification Highlights

Technical specifications for the 2008 Yamaha WR250F(X) include precise cylinder head warp limits of 0.05 mm and valve clearances documented as 0.10–0.15 mm for intake and 0.17–0.22 mm for exhaust. The engine oil capacity is specified at 1.1 L for a periodic change and 1.2 L for a full filter replacement.

Torque values are listed throughout, such as the 145 Nm specification for the steering stem nut. Intake valve clearance is listed at 0.10–0.15 mm in the valve specification table. Coolant system capacity for the 2008 WR250F(X) is documented at 0.99 liters. The pickup coil resistance is specified at 248–372 ohms at 20 °C. Reference factory workshop documentation for the 2008 Yamaha WR250F(X) to ensure adherence to maintenance schedules for this competition-grade motorcycle.

Note: This document is for reference only; qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 222-page Yamaha OEM service manual covering the 2008 WR250F(X), documenting engine, chassis, electrical, and carburetor specifications for the 5UM-series race motorcycle.

Manual FAQ, Purchase & Download Details

Can I view the exploded views and component breakdown diagrams for the WR250F(X) in this document? keyboard_arrow_down

Yes, the manual includes detailed exploded diagrams for the removal and disassembly of various machine sections. These illustrations are paired with job instruction charts to assist in identifying part order and assembly details.

Which chapters provide specification tables for maintenance and tightening torques? keyboard_arrow_down

Chapter 2 contains dedicated sections for general and maintenance specifications, as well as tables for tightening torques and lubrication diagrams.

What content is included in the engine and electrical chapters for the 2008 model? keyboard_arrow_down

Engine chapter covers major system components such as the cylinder head, valves, crankshaft, and transmission assemblies. The electrical chapter includes wiring diagrams, ignition system references, and procedures for using a tester on connectors.

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