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
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
- TUNING
  - CHASSIS
  - KICKSTARTER KIT (OPTIONAL PARTS)
- WIRING DIAGRAM

Yamaha YZ250FXK YZ250FX 2019 Owner's Manual

Yamaha YZ250FXK YZ250FX 2019 manual cover

Pages 398

Year 2019

Language(s)

of 398

Yamaha YZ250FXK YZ250FX 2019 Specification

The Yamaha YZ250FXK YZ250FX 2019 is a high-performance, cross-country motorcycle engineered for competitive racing and advanced off-road riding. It is powered by a 250cc, liquid-cooled, DOHC, 4-stroke engine, delivering an optimal blend of power and reliability. The engine features a forward-positioned straight intake, which enhances the bike's fuel efficiency and performance by providing a more direct airflow into the combustion chamber. The YZ250FXK also includes Yamaha’s proprietary fuel injection system, which ensures precise fuel delivery for consistent power output across various riding conditions.

The bike's chassis is designed with a bilateral beam aluminum frame, offering a perfect balance of rigidity and flexibility for superior handling and stability. The suspension system boasts fully adjustable KYB® spring-type forks in the front and a KYB® rear shock, providing exceptional control and comfort on diverse terrains. Additionally, the YZ250FXK comes equipped with a wide-ratio 6-speed transmission, allowing for smooth gear transitions and adaptability to different off-road scenarios.

The braking system comprises powerful front and rear disc brakes, ensuring reliable stopping power in all conditions. The motorcycle also features an 18-inch rear wheel and a 21-inch front wheel, both fitted with high-traction tires designed for off-road use. Ergonomically, the YZ250FXK is tailored for rider comfort and control, with a flat seat, slim bodywork, and adjustable handlebar positions.

Moreover, the bike includes advanced technology such as an electric start system with a lightweight lithium-ion battery, making it convenient for quick and effortless starts. The Yamaha YZ250FXK YZ250FX 2019 is a robust, agile, and technologically advanced motorcycle, ideal for serious riders seeking a competitive edge in cross-country racing.

Yamaha YZ250FXK YZ250FX 2019 F.A.Q.

How often should I change the oil on my 2019 Yamaha YZ250FX?

It is recommended to change the oil every 10 hours of riding or after every race. Regular oil changes ensure optimal performance and longevity of the engine.

What type of fuel is best for the Yamaha YZ250FX 2019?

The YZ250FX is designed to run on 91 octane unleaded fuel. Using the correct fuel type helps maintain engine performance and efficiency.

How do I adjust the suspension for optimal performance?

To adjust the suspension, start by setting the sag according to your weight. Use the adjusters on the forks and shock to fine-tune compression and rebound based on your riding style and terrain. Consult the owner’s manual for specific settings.

What is the recommended tire pressure for the YZ250FX 2019?

The recommended tire pressure for the front tire is 15 psi and for the rear tire is 15 psi. Adjust pressure based on terrain and riding conditions.

How can I troubleshoot starting issues with my YZ250FX?

Check the battery charge, ensure the fuel valve is open, and the engine stop switch is in the run position. Verify the spark plug is clean and properly gapped.

What maintenance should be performed after riding in muddy conditions?

After riding in muddy conditions, clean the bike thoroughly, inspect and lubricate the chain, check the air filter, and ensure all moving parts are free of debris.

How do I adjust the clutch on my Yamaha YZ250FX?

To adjust the clutch, locate the clutch cable adjuster at the lever. Turn the adjuster to achieve the desired free play, typically 10-15mm at the lever end. Ensure smooth operation without slipping.

What should I do if the engine overheats?

If the engine overheats, stop the bike and allow it to cool down. Check the coolant level, inspect the radiator for obstructions, and ensure the cooling system is functioning properly.

How do I clean and maintain the air filter on my YZ250FX?

Remove the air filter, clean it with a suitable cleaner, and allow it to dry. Apply an air filter oil evenly before reinstalling. Regular maintenance prevents engine damage from dirt and debris.

What steps should I follow for winter storage of the YZ250FX?

For winter storage, clean the bike thoroughly, change the oil, add a fuel stabilizer, remove the battery and keep it charged, and store the bike in a dry place. Cover to protect from dust and moisture.