Contents

- GENERAL INFORMATION
  - DESCRIPTION
  - MACHINE IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - CHECKING OF CONNECTION
  - SPECIAL TOOLS
  - CONTROL FUNCTIONS
  - STARTING AND BREAK-IN
  - TORQUE-CHECK POINTS
  - CLEANING AND STORAGE
- SPECIFICATIONS
  - GENERAL SPECIFICATIONS
  - MAINTENANCE SPECIFICATIONS
  - TIGHTENING TORQUES
  - 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
  - KICK SHAFT AND SHIFT SHAFT
  - 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
  - THROTTLE POSITION SENSOR SYSTEM
- TUNING
  - ENGINE
  - CHASSIS

Yamaha YZ250X 2009 Owner's Manual

Pages 244

Year 2009

Language(s)

of 244

Yamaha YZ250X 2009 Specification

The Yamaha YZ250X 2009 is a high-performance off-road motorcycle designed for competitive enduro racing and trail riding. At its core, the bike features a 249cc liquid-cooled, two-stroke engine with a reed valve inducted system, delivering robust power and excellent throttle response. The engine is paired with a wide-ratio five-speed transmission, which provides optimal gear selection for various terrains and riding conditions.

The YZ250X's frame is constructed from lightweight aluminum, ensuring a balance between rigidity and flexibility, crucial for handling rough trails and obstacles. The bike is equipped with a fully adjustable KYB suspension system, including a 48mm inverted front fork and a rear shock, offering superior damping and stability over uneven terrain.

Braking is managed by a hydraulic disc system, featuring a 270mm front disc and a 245mm rear disc, providing reliable stopping power. The YZ250X rolls on durable, off-road-specific tires mounted on lightweight aluminum rims, enhancing traction and durability in challenging environments.

The ergonomics of the YZ250X are designed for rider comfort and control, with a slim profile, a flat seat, and adjustable handlebar positions to accommodate various rider preferences. The bike's fuel tank holds 2.1 gallons, ensuring sufficient range for extended rides.

Additional features include a lightweight exhaust system with an aluminum silencer, which helps to reduce weight while maintaining performance. The air filter is easily accessible for quick maintenance, and the bike's overall design emphasizes ease of serviceability. The YZ250X 2009 combines Yamaha's renowned reliability with advanced engineering, making it a formidable choice for serious off-road enthusiasts.

Yamaha YZ250X 2009 F.A.Q.

What is the recommended spark plug gap for a Yamaha YZ250X 2009?

The recommended spark plug gap for a Yamaha YZ250X 2009 is 0.7-0.8 mm (0.028-0.031 inches).

How often should I change the transmission oil on my Yamaha YZ250X 2009?

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

What type of coolant should I use for the Yamaha YZ250X 2009?

Use a high-quality ethylene glycol antifreeze coolant mixed 50/50 with distilled water for the Yamaha YZ250X 2009.

How do I adjust the suspension settings on my Yamaha YZ250X 2009 for trail riding?

For trail riding, consider softening the compression damping settings by turning the adjusters counter-clockwise to improve comfort and traction over rough terrain.

What is the correct tire pressure for a Yamaha YZ250X 2009?

The recommended tire pressure for the Yamaha YZ250X 2009 is 12 psi for both the front and rear tires. Adjust based on terrain and riding conditions.

How do I troubleshoot starting issues with my Yamaha YZ250X 2009?

Check the spark plug for wear or fouling, ensure the fuel is fresh, and verify that the choke is functioning properly. Inspect the air filter and clean or replace if dirty.

What maintenance should I perform after every ride on my Yamaha YZ250X 2009?

After each ride, clean the bike thoroughly, inspect for any loose bolts or damage, lubricate the chain, and check fluid levels such as coolant and brake fluid.

How can I improve the fuel efficiency of my Yamaha YZ250X 2009?

Ensure the air filter is clean, maintain proper tire pressure, use high-quality fuel, and adjust the carburetor settings for optimal performance.

What are common signs of a worn clutch on a Yamaha YZ250X 2009?

Signs of a worn clutch include slipping under acceleration, difficulty in shifting gears, and a noticeable loss of power. Inspect clutch plates and springs for wear and replace if necessary.

How do I properly store my Yamaha YZ250X 2009 during the off-season?

Clean the bike thoroughly, drain the fuel or add a fuel stabilizer, lubricate moving parts, disconnect the battery, and store in a dry, covered location.