2008 Yamaha YZ250FX Owner's Service Manual

This manual covers the 2008 Yamaha YZ250FX, detailing engine, chassis, and electrical systems for comprehensive maintenance and repair. Part ref: 5XC-L0

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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: 2008 Yamaha YZ250FX (USA, CDN, AUS, NZ), 2008 Yamaha YZ250F (Europe, ZA)
Sub-models / Variants: USA, Canada, Australia, New Zealand, Europe, South Africa
Build Years: 2008
Serial Numbers: 5XCL (USA, CDN), 5XCM (Europe), 5XCP (AUS, NZ, ZA)
Technical Data:

  • Engine type: Liquid cooled 4-stroke, DOHC
  • Engine displacement: 249 cm3
  • Bore x stroke: 77.0 x 53.6 mm
  • Compression ratio: 13.5:1
  • Carburetor type: FCR-MX37 (Keihin)
  • Dry weight: 92.7 kg (204 lb)
  • Fuel tank capacity: 7.0 L
  • Transmission: 5-speed constant mesh
  • Ignition system: CDI magneto
  • Coolant capacity: 0.99 L
Technical Specifications
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Document Number / Seller:
29635 / Douglas Cook
File Size:
7.59 MB
File Type:
PDF
Language:
English
Pages:
186
Printable:
Yes
Category:
Bike
Last updated / verified
Apr 19, 2026

Yamaha Manual Features & Content Preview

2008 Yamaha YZ250FX and YZ250F Technical Documentation

  • Covers 2008 Yamaha YZ250FX and YZ250F motocross racing machines, detailing maintenance and tuning for the 5XCL, 5XCM, and 5XCP model codes
  • Official Yamaha publication P/N (not specified), Owner's Service Manual revision for the 2008 model year
  • Contains 47 detailed exploded-view diagrams, 16 maintenance specification tables, and 2 extensive cable routing diagrams
  • Accessible from your device as soon as the order is placed
  • Laid out for standard letter and A4 printing
  • Full-text search finds any part number in seconds
  • Permanent availability in your purchase account — no re-buy required
  • This official 2008 service publication is the primary reference for the 2008 YZ250FX and YZ250F, providing complete mechanical data for the liquid-cooled 4-stroke DOHC engine architecture

Documented Systems and Maintenance Coverage

The 186-page manual provides technical guidance for all major assemblies. Chapters cover General Information and Specifications followed by extensive documentation on Regular Inspection and Adjustments. Detailed engine chapters focus on the fuel system (FCR-MX37 carburetor), cylinder head, camshafts, piston, clutch, and water pump. The chassis section outlines suspension tuning (front fork and rear monocross), steering head, and hydraulic brake service. The final sections document the ignition system, sensor diagnostics, and chassis tuning parameters.

Technical Reference and Specification Highlights

The specification tables include critical values such as 100 kPa for tire pressure and engine oil capacity of 1.15 L with filter replacement. Cylinder head warpage is documented at a limit of 0.05 mm. Spark plug gap is specified at 0.7–0.8 mm. Torque values are listed for every fastener, including 145 Nm for the steering stem nut. The document also details carburetor jetting and electrical sensor thresholds.

Reference only — always consult a certified technician before performing service on this equipment. This official 186-page Yamaha OEM owner's service manual covers the 2008 YZ250FX and YZ250F, documenting engine, chassis, electrical, and fuel-system specifications for the 5XCL-series build.

Manual FAQ, Purchase & Download Details

Are wiring diagram references and electrical component location charts included in the 2008 YZ250FX manual? keyboard_arrow_down

Chapter 6 includes electrical components and wiring diagrams for the electrical system. This section also covers the ignition system and throttle position sensor system.

Does this document include revision information for the 2008 YZ250FX model? keyboard_arrow_down

Foreword notes that the manual contains the most current product information available at the time of printing and outlines the format used for disassemblies.

Can I find exploded views for the engine and chassis components within the manual? keyboard_arrow_down

Manual contains exploded diagrams at the start of each removal and disassembly section to help identify parts and clarify procedures. These diagrams provide visual references for various engine and chassis systems throughout the technical chapters.

Is there specific chapter coverage for the engine, transmission, and final drive? keyboard_arrow_down

Chapter 4 provides detailed content on engine components, including the cylinder head, clutch, transmission, and crankshaft.

What information is provided regarding fluid capacities and lubrication requirements? keyboard_arrow_down

Specifications chapter includes detailed tables for engine oil and coolant capacities. It also lists recommended oil types and grades based on regional requirements. Additionally, the manual contains lubrication diagrams to help locate points for maintenance.

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