Contents

- GENERAL INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - 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 YZ250Y 2010 Owner's Manual

Pages 246

Year 2010

Language(s)

of 246

Yamaha YZ250Y 2010 Specification

The Yamaha YZ250Y 2010 is a high-performance motocross motorcycle engineered for both professional and amateur riders. This model features a liquid-cooled, 249cc, two-stroke engine, which provides robust power delivery and impressive acceleration. The reed-valve induction system enhances throttle response, ensuring quick and precise control. The YZ250Y is equipped with a five-speed transmission, offering a versatile range of power suitable for various terrains and race conditions.

The chassis of the YZ250Y 2010 is constructed from lightweight aluminum, contributing to its agility and ease of handling. The bike's suspension system includes a fully adjustable 48mm KYB Speed-Sensitive System (SSS) fork at the front and a fully adjustable KYB rear shock, allowing riders to fine-tune the settings for optimal performance and comfort. The braking system consists of a 250mm front disc brake and a 245mm rear disc brake, providing reliable stopping power.

The ergonomics of the YZ250Y are designed for rider comfort and control, featuring a flat seat, grippy footpegs, and adjustable handlebars. The fuel tank capacity is 2.1 gallons, which is sufficient for extended riding sessions without frequent refueling. The bike's overall weight is approximately 227 pounds, making it one of the lighter options in its class.

Aesthetically, the YZ250Y sports Yamaha's iconic blue and white color scheme, complemented by aggressive graphics that emphasize its racing pedigree. Maintenance is straightforward, with easy access to the air filter and other critical components. The Yamaha YZ250Y 2010 remains a popular choice for motocross enthusiasts due to its blend of power, agility, and durability.

Yamaha YZ250Y 2010 F.A.Q.

What is the recommended maintenance schedule for the Yamaha YZ250Y 2010?

The recommended maintenance schedule includes regular checks of the air filter, chain, and tire pressure before each ride. Perform an oil change every 10-15 hours of riding, and inspect the brakes and suspension components every 20 hours.

How can I improve the suspension setup on my Yamaha YZ250Y 2010 for different terrains?

Adjust the suspension settings by first setting the sag according to your weight. For soft terrain, consider softening the compression damping, while for hard terrain, stiffen the compression for better handling. Always test ride after adjustments.

What are the common starting issues with the Yamaha YZ250Y 2010 and how can I troubleshoot them?

Common starting issues include a fouled spark plug, clogged air filter, or stale fuel. Check and replace the spark plug if necessary, clean or replace the air filter, and ensure fresh fuel is used.

How do I properly clean and maintain the air filter on my Yamaha YZ250Y 2010?

Remove the air filter from the airbox, wash it with a mild detergent, rinse thoroughly, and allow it to dry completely. Apply air filter oil evenly before reinstalling. Check for tears and replace if damaged.

What type of oil is recommended for the Yamaha YZ250Y 2010 engine and how often should it be changed?

Yamaha recommends using a high-quality 2-stroke oil. Change the oil every 10-15 hours of riding, depending on the conditions and riding style. Always check the oil level before each ride.

How can I troubleshoot electrical problems on my Yamaha YZ250Y 2010?

Start by checking the battery connections and ensuring they are tight and corrosion-free. Inspect the wiring harness for any signs of wear or damage. Use a multimeter to test continuity and replace any faulty components.

What are the steps to adjust the chain tension on a Yamaha YZ250Y 2010?

To adjust the chain tension, place the bike on a stand, loosen the rear axle nut, and adjust the chain adjusters evenly on both sides. Ensure proper slack is maintained (about 1.2 inches) before tightening the axle nut securely.

How do I bleed the brakes on my Yamaha YZ250Y 2010?

To bleed the brakes, remove the reservoir cap, attach a clear hose to the bleed nipple, and submerge the other end in brake fluid. Pump the brake lever, open the bleed nipple to release air, then close it. Repeat until no air bubbles appear.

What are some tips for winterizing my Yamaha YZ250Y 2010?

To winterize your bike, clean it thoroughly, drain the fuel tank or add a fuel stabilizer, and remove the battery to store it in a warm place. Lubricate all moving parts and cover the bike to protect it from moisture.

How can I improve the performance of my Yamaha YZ250Y 2010?

Performance can be enhanced by upgrading the exhaust system, tuning the carburetor, and using high-quality performance parts such as a reed valve system. Regular maintenance and proper setup will also ensure optimal performance.