2008 Yamaha YZ250X / YZ250W / YZ250 Service Manual

2008 Yamaha YZ250X Service Manual Technical Documentation

• Covers 2008 Yamaha YZ250X, YZ250W, and YZ250 motorcycles, detailing maintenance, assembly, and system-specific adjustments for the 1P8-series build
• Official Yamaha publication P/N LIT-11626-21-44, first edition June 2007
• Contains 47 detailed exploded-view diagrams and 39 comprehensive torque specification tables
• Delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Suitable for printing individual sections for shop-floor use
• Permanent availability in your purchase account — no re-buy required
• This official 244-page factory manual is the definitive reference for the 2008 YZ250X 2-stroke competition line, providing the precise engineering data and assembly tolerances required for professional-grade maintenance work

Document Content and Structure

The 2008 Yamaha YZ250X service manual is organized into seven core chapters that provide a thorough technical overview of the machine. The documentation begins with General Information, including machine identification codes, special tool requirements, and transport security protocols. It follows with extensive sections on Specifications and Regular Inspections, outlining maintenance intervals for the engine, chassis, and electrical components. The manual then provides deep-dive instructions on the engine assembly, including the exhaust, radiator, carburetor, cylinder, piston, clutch, and crankshaft. Chassis maintenance chapters detail the front/rear suspension, brake systems, swingarm, and steering head, while the electrical section covers ignition system parameters and wiring.

Specification and Reference Data

This publication provides rigorous technical depth regarding the YZ250X powerplant and chassis. The engine assembly data lists critical torque values, such as 25 Nm for the cylinder head nuts and 42 Nm for cylinder nuts. Spark plug cap resistance is specified at 4–6 kΩ for consistent ignition performance. Intake and cooling specifications are documented extensively, noting the 1.20 L coolant capacity and the 30:1 premix ratio. The carburetor setup section details the specific PWK38S main jet, pilot jet, and needle settings for different regional markets. The chassis section provides tolerance charts for the front fork springs and rear shock absorbers, while electrical reference values include charging coil resistance ranging from 44 to 1,080 ohms. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 244-page Yamaha OEM workshop manual covering the 2008 Yamaha YZ250X, documenting engine, chassis, electrical, and fuel-delivery specifications for the 1P8-series motocross machine.