Contents

- GENERAL INFORMATION
  - DESCRIPTION
  - MACHINE IDENTIFICATION
  - IMPORTANT INFORMATION
  - CHECKING OF CONNECTION
  - SPECIAL TOOLS
  - CONTROL FUNCTIONS
  - FUEL AND ENGINE MIXING OIL
  - STARTING AND BREAK-IN
  - TORQUE-CHECK POINTS
  - CLEANING AND STORAGE
- SPECIFICATIONS
  - GENERAL SPECIFICATIONS
  - MAINTENANCE SPECIFICATIONS
  - GENERAL TORQUE SPECIFICATIONS
  - DEFINITION OF UNITS
  - CABLE ROUTING DIAGRAM
- REGULAR INSPECTION AND ADJUSTMENTS
  - MAINTENANCE INTERVALS
  - PRE-OPERATION INSPECTION AND MAINTENANCE
  - ENGINE
  - CHASSIS
  - ELECTRICAL
- ENGINE
  - SEAT,FUEL TANK AND SIDE COVERS
  - EXHAUST PIPE AND SILENCER
  - RADIATOR
  - CARBURETOR AND REED VALVE
  - CYLINDER HEAD,CYLINDER AND PISTON
  - CLUTCH AND PRIMARY DRIVEN GEAR
  - KICK AXLE,SHIFT SHAFT AND PRIMARY DRIVE GEAR
  - YPVS GOVERNOR
  - WATER PUMP
  - CDI MAGNETO
  - ENGINE REMOVAL
  - CRANKCASE AND CRANKSHAFT
  - TRANSMISSION,SHIFT CAM AND SHIFT FORK
- CHASSIS
  - FRONT WHEEL AND REAR WHEEL
  - FRONT BRAKE AND REAR BRAKE
  - FRONT FORK
  - HANDLEBAR
  - STEERING
  - SWINGARM
  - REAR SHOCK ABSORBER
- ELECTRICAL
  - ELECTRICAL COMPONENTS AND WIRING DIAGRAM
  - IGNITION SYSTEM
  - SOLENOID VALVE SYSTEM
  - TPS (THROTTLE POSITION SENSOR)SYSTEM
- TUNING
  - ENGINE
  - CHASSIS

Yamaha YZ250W1 2008 Owner's Manual

Pages 276

Year 2008

Language(s)

of 276

Yamaha YZ250W1 2008 Specification

The Yamaha YZ250W1 2008 is a high-performance two-stroke motocross bike designed for competitive racing and off-road adventures. It features a liquid-cooled, 249cc engine that provides exceptional power and acceleration, enabling riders to tackle challenging terrains with ease. The engine is paired with a constant-mesh, five-speed transmission, which ensures smooth and efficient power delivery across various riding conditions.

The bike's lightweight aluminum frame offers a perfect balance of rigidity and flexibility, enhancing handling and maneuverability. Its advanced suspension system comprises a fully adjustable KYB front fork with 11.8 inches of travel and a KYB rear shock with 12.4 inches of travel, providing superior shock absorption and stability on rough trails.

For braking, the YZ250W1 is equipped with a 250mm front disc brake and a 245mm rear disc brake, delivering reliable and responsive stopping power. The 21-inch front and 19-inch rear wheels are fitted with durable knobby tires, ensuring optimal traction and control on various surfaces.

The bike's ergonomic design includes a comfortable seat, well-positioned handlebars, and foot pegs that allow for an aggressive riding stance, contributing to rider comfort and control during extended rides. The fuel tank has a capacity of 2.1 gallons, providing sufficient range for long-distance off-road excursions.

Aesthetically, the Yamaha YZ250W1 2008 sports a sleek, aggressive look with minimalistic graphics and a distinctive blue and white color scheme that reflects Yamaha's racing heritage. Overall, the Yamaha YZ250W1 2008 is a robust and agile motocross bike that combines advanced engineering, superior performance, and rider-focused design, making it a top choice for serious riders and enthusiasts.

Yamaha YZ250W1 2008 F.A.Q.

What is the recommended oil type for the Yamaha YZ250W1 2008?

The recommended oil type for the Yamaha YZ250W1 2008 is Yamalube 2-R semi-synthetic two-stroke engine oil, or any equivalent high-quality 2-stroke oil.

How often should I clean the air filter on my YZ250W1 2008?

It is recommended to clean the air filter after every ride, especially if you have been riding in dusty or dirty conditions. Regular maintenance will ensure optimal performance.

What is the correct tire pressure for the Yamaha YZ250W1 2008?

The correct front tire pressure should be 12 psi, and the rear tire should also be inflated to 12 psi for the Yamaha YZ250W1 2008.

How can I troubleshoot starting issues with my YZ250W1 2008?

Check the spark plug for fouling, ensure the fuel is fresh, inspect the fuel lines for blockages, and verify that the carburetor is clean.

What is the recommended spark plug for the Yamaha YZ250W1 2008?

The recommended spark plug for the Yamaha YZ250W1 2008 is NGK BR8EG or equivalent.

How often should I change the transmission oil on the YZ250W1 2008?

It is recommended to change the transmission oil every 10 hours of riding or after every race to ensure smooth operation and longevity of the transmission.

What are the steps to adjust the chain tension on my YZ250W1 2008?

Loosen the rear axle nut, adjust the chain tensioners evenly on both sides, ensuring proper slack, and then retighten the axle nut to secure the adjustment.

Why does my Yamaha YZ250W1 2008 have poor throttle response?

Poor throttle response can be due to a clogged air filter, dirty carburetor jets, or an incorrectly tuned carburetor. Regular cleaning and proper tuning can resolve these issues.

How do I properly store my YZ250W1 2008 for the winter?

Clean the bike thoroughly, drain the fuel tank, lubricate moving parts, disconnect the battery, and store it in a dry place to prevent rust and corrosion.

What are some common suspension issues with the YZ250W1 2008, and how can they be fixed?

Common suspension issues include leaking forks and improper damping settings. Regularly check for oil leaks, replace seals as necessary, and adjust the damping settings to suit your riding style and terrain.