Contents

- GENERAL INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - CONSUMER INFORMATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - CHECKING OF CONNECTION
  - SPECIAL TOOLS
  - CONTROL FUNCTIONS
  - STARTING AND BREAK-IN
  - TORQUE-CHECK POINTS
  - MAINTENANCE AFTER BREAK-IN
  - 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 YZ250J2, YZ250XJ YZ250, YZ250X 2018 Owner's Manual

Yamaha YZ250J2, YZ250XJ YZ250, YZ250X 2018 manual cover

Pages 252

Year 2018

Language(s)

of 252

Yamaha YZ250J2, YZ250XJ YZ250, YZ250X 2018 Specification

The 2018 Yamaha YZ250J2, YZ250XJ, YZ250, and YZ250X models are designed to deliver exceptional performance across various off-road terrains. These bikes feature a 249cc liquid-cooled, two-stroke, reed-valve inducted engine that offers a potent combination of power and responsiveness. Each model is equipped with advanced Yamaha Power Valve System (YPVS) technology, which optimizes exhaust timing for enhanced torque and power delivery.

The chassis of these bikes is constructed from lightweight aluminum, providing a robust yet agile framework that enhances maneuverability and control. The suspension system includes fully adjustable KYB® Speed-Sensitive System forks, which allow for precise tuning to match the rider's preferences and terrain conditions. The rear suspension features a fully adjustable KYB® shock with a rear linkage system, delivering exceptional stability and comfort.

Braking performance is ensured by the use of large-diameter front and rear disc brakes, which provide strong stopping power under various riding conditions. The ergonomics of the YZ250 series are designed to offer a comfortable and intuitive riding experience, with a flat seat and adjustable handlebar positions to accommodate different rider sizes and styles.

The YZ250X models are tailored specifically for cross-country and enduro riding, featuring a wide-ratio five-speed transmission that provides versatility across different types of terrain. Additionally, these models come with an 18-inch rear wheel, a kickstand, and a reserve fuel petcock, making them well-suited for long-distance and endurance rides.

Overall, the 2018 Yamaha YZ250J2, YZ250XJ, YZ250, and YZ250X deliver a high-performance, versatile riding experience, combining advanced engine and chassis technologies to meet the demands of both competitive and recreational riders.

Yamaha YZ250J2, YZ250XJ YZ250, YZ250X 2018 F.A.Q.

What is the recommended maintenance schedule for the Yamaha YZ250?

For the Yamaha YZ250, it is recommended to perform regular maintenance including oil changes every 10 hours of riding, air filter cleaning after every ride, and regular checks on the chain, sprockets, and brake pads.

How do I troubleshoot a Yamaha YZ250 that won't start?

If your YZ250 won't start, check the fuel supply, ensure the spark plug is clean and functional, verify the kill switch is in the correct position, and inspect the carburetor for any clogs.

What type of oil should be used in a Yamaha YZ250X?

The Yamaha YZ250X requires a high-quality 2-stroke engine oil. It is recommended to use Yamalube 2R or equivalent for optimal performance.

How can I adjust the suspension on a Yamaha YZ250J2 for better performance?

To adjust the suspension on a YZ250J2, start by setting the sag according to your weight, adjust the rebound and compression settings on the forks and shock based on terrain type, and test ride to fine-tune.

What are common issues with the Yamaha YZ250XJ and how can they be resolved?

Common issues with the YZ250XJ include carburetor blockages, which can be resolved by thorough cleaning, and chain wear, which requires regular lubrication and tension adjustments.

How often should the air filter be replaced in a YZ250?

The air filter in a YZ250 should be inspected and cleaned after every ride in dusty conditions and replaced entirely every 10 rides or if it shows signs of wear or damage.

Can I use aftermarket parts for the Yamaha YZ models, and will it affect performance?

Aftermarket parts can be used on Yamaha YZ models, but it is crucial to choose high-quality components from reputable brands to ensure they do not negatively impact performance or reliability.

How do I properly store a Yamaha YZ250X for an extended period?

To store a YZ250X for an extended period, drain the fuel, clean the bike thoroughly, lubricate moving parts, remove the battery, and store it in a dry, cool place, preferably elevated off the ground.

What is the correct tire pressure for a Yamaha YZ250 on different terrains?

For a YZ250, tire pressure should typically be set at 12 psi for soft terrain, 14 psi for intermediate, and 16 psi for hard-packed surfaces to ensure optimal traction and performance.

How can I enhance the performance of my Yamaha YZ250X?

Enhancing the performance of a YZ250X can be achieved by upgrading the exhaust system, re-jetting the carburetor for improved fueling, optimizing suspension settings, and ensuring regular maintenance is performed.