Contents

- GENERAL INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - BASIC SERVICE INFORMATION
  - SPECIAL TOOLS
  - CONTROL FUNCTIONS
  - STARTING AND BREAK-IN
  - MAINTENANCE AFTER BREAK-IN
  - TORQUE-CHECK POINTS
  - MOTORCYCLE CARE AND STORAGE
- SPECIFICATIONS
  - GENERAL SPECIFICATIONS
  - ENGINE SPECIFICATIONS
  - CHASSIS SPECIFICATIONS
  - ELECTRICAL SPECIFICATIONS
  - TIGHTENING TORQUES
  - LUBRICATION POINTS AND LUBRICANT TYPES
  - LUBRICATION SYSTEM CHART AND DIAGRAMS
  - CABLE ROUTING DIAGRAM
- PERIODIC CHECKS AND ADJUSTMENTS
  - MAINTENANCE INTERVALS
  - PRE-OPERATION INSPECTION AND MAINTENANCE
  - ENGINE
  - CHASSIS
  - ELECTRICAL SYSTEM
- CHASSIS
  - GENERAL CHASSIS
  - FRONT WHEEL
  - REAR WHEEL
  - FRONT BRAKE
  - REAR BRAKE
  - HANDLEBAR
  - FRONT FORK
  - STEERING HEAD
  - REAR SHOCK ABSORBER ASSEMBLY
  - SWINGARM
  - CHAIN DRIVE
- ENGINE
  - ENGINE REMOVAL
  - CAMSHAFT
  - CYLINDER HEAD
  - VALVES AND VALVE SPRINGS
  - CYLINDER AND PISTON
  - ELECTRIC STARTER
  - CLUTCH
  - SHIFT SHAFT
  - OIL PUMP AND BALANCER GEAR
  - GENERATOR AND STARTER CLUTCH
  - CRANKCASE
  - CRANKSHAFT ASSEMBLY AND BALANCER SHAFT
  - TRANSMISSION
- COOLING SYSTEM
  - RADIATOR
  - WATER PUMP
- FUEL SYSTEM
  - FUEL TANK
  - THROTTLE BODY
- ELECTRICAL SYSTEM
  - IGNITION SYSTEM
  - ELECTRIC STARTING SYSTEM
  - CHARGING SYSTEM
  - SIGNALING SYSTEM
  - COOLING SYSTEM (For JPN)
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
- TUNING
  - CHASSIS
  - KICK STARTER KIT (OPTIONAL PARTS)
- WIRING DIAGRAM

Yamaha YZ250FXJ YZ250FX 2018 Owner's Manual

Yamaha YZ250FXJ YZ250FX 2018 manual cover

Pages 402

Year 2018

Language(s)

of 402

Yamaha YZ250FXJ YZ250FX 2018 Specification

The Yamaha YZ250FXJ YZ250FX 2018 is a high-performance off-road motorcycle engineered to deliver exceptional power and agility for competitive racing and advanced trail riding. At its core, the bike is equipped with a 250cc, liquid-cooled, DOHC, four-stroke engine that features a forward-inclined single-cylinder configuration. This engine setup ensures optimal power delivery and enhanced torque across a broad RPM range, making it suitable for varied terrains and riding conditions.

The YZ250FXJ incorporates Yamaha's proprietary fuel injection system, which optimizes fuel delivery for consistent performance and improved fuel efficiency. Paired with a wide-ratio six-speed transmission, the bike offers versatile gearing options that cater to both high-speed sections and technical trails.

The chassis of the YZ250FXJ is designed with a bilateral beam aluminum frame, providing a perfect balance of rigidity and flexibility. This results in superior handling and stability, essential for navigating challenging off-road environments. The suspension system includes a fully adjustable KYB® spring-type fork at the front and a fully adjustable KYB® shock at the rear, both designed to absorb impacts and maintain control over rough terrain.

Braking performance is assured with large-diameter disc brakes, featuring wave rotors that enhance stopping power and reduce heat buildup. The bike’s ergonomics are tailored for aggressive riding, with a narrow seat, tapered handlebars, and strategically positioned footpegs to facilitate better rider movement and control.

Additional features include an electric start with a compact battery, a lightweight aluminum kickstand, and an 18-inch rear wheel designed for increased traction and durability. The Yamaha YZ250FXJ YZ250FX 2018 embodies a blend of advanced engineering and practical features, making it a formidable choice for serious off-road riders and racers.

Yamaha YZ250FXJ YZ250FX 2018 F.A.Q.

What type of oil should I use for the Yamaha YZ250FXJ YZ250FX 2018?

Use a high-quality synthetic 10W-40 motorcycle oil designed for wet clutches, such as Yamalube or a similar brand.

How often should I change the oil in my YZ250FXJ YZ250FX 2018?

It's recommended to change the oil every 10 hours of riding or after every two races, whichever comes first.

What is the correct tire pressure for the Yamaha YZ250FXJ YZ250FX 2018?

The recommended tire pressure is 12-15 psi for both the front and rear tires, depending on the terrain and rider preference.

How do I adjust the suspension on my YZ250FXJ YZ250FX 2018?

To adjust the suspension, refer to the owner's manual for baseline settings, then fine-tune the compression and rebound damping according to your weight and riding style.

What regular maintenance should be performed on the YZ250FXJ YZ250FX 2018?

Regular maintenance includes checking and lubricating the chain, cleaning the air filter, inspecting brake pads, and checking fluid levels.

How do I troubleshoot starting issues with my YZ250FXJ YZ250FX 2018?

Check the battery charge, inspect the spark plug for wear or damage, and ensure the fuel is fresh. If the problem persists, consult a professional mechanic.

What is the proper way to clean the air filter on the YZ250FXJ YZ250FX 2018?

Remove the air filter, wash it with a mild soap and water solution, let it dry completely, and then apply air filter oil before reinstalling.

How can I improve the performance of my YZ250FXJ YZ250FX 2018?

Consider upgrading the exhaust system, re-jetting the carburetor, or adjusting the ECU settings for improved performance.

What should I do if the engine overheats on my YZ250FXJ YZ250FX 2018?

Stop riding immediately, check the coolant level, ensure the radiator is not blocked, and let the engine cool down before investigating further.

How do I adjust the chain tension on my YZ250FXJ YZ250FX 2018?

Loosen the axle nut, adjust the tension using the chain adjusters to maintain a 1.2-1.6 inches of slack, and then retighten the axle nut securely.