Contents

- GENERAL INFORMATION
  - SAFETY INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - BASIC SERVICE INFORMATION
  - SPECIAL TOOLS
  - INSTRUMENT AND 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
  - 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
  - LUBRICATION SYSTEM CHART AND DIAGRAMS
  - ENGINE REMOVAL
  - CAMSHAFT
  - CYLINDER HEAD
  - VALVES AND VALVE SPRINGS
  - CYLINDER AND PISTON
  - GENERATOR
  - STARTER CLUTCH
  - ELECTRIC STARTER
  - CLUTCH
  - SHIFT SHAFT
  - OIL PUMP
  - CRANKCASE
  - CRANKSHAFT AND BALANCER SHAFT
  - TRANSMISSION
- COOLING SYSTEM
  - COOLING SYSTEM DIAGRAMS
  - RADIATOR
  - WATER PUMP
- FUEL SYSTEM
  - FUEL TANK
  - THROTTLE BODY
- ELECTRICAL SYSTEM
  - IGNITION SYSTEM
  - ELECTRIC STARTING SYSTEM
  - CHARGING SYSTEM
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
- TUNING
  - CHASSIS
- WIRING DIAGRAM

Yamaha YZ250FL YZ250F 2020 Owner's Manual

Pages 364

Year 2020

Language(s)

of 364

Yamaha YZ250FL YZ250F 2020 Specification

The Yamaha YZ250FL YZ250F 2020 is a high-performance motocross bike designed for competitive racing and advanced riders. This model is powered by a 250cc liquid-cooled, four-stroke, DOHC engine that features advanced fuel injection and a forward-positioned downdraft intake for optimal power delivery and efficiency. The innovative engine design is paired with a five-speed transmission that ensures smooth and precise shifting, allowing riders to maintain control in various racing conditions.

The YZ250F 2020 boasts a lightweight, bilateral beam frame constructed from aluminum, providing a perfect balance of rigidity and flex for enhanced handling and stability. The suspension system includes KYB® Speed-Sensitive System inverted forks at the front, with 12.2 inches of travel, and a fully adjustable KYB® rear shock, offering 12.5 inches of travel. This setup ensures exceptional performance over rough terrain, enabling riders to tackle jumps and bumps with confidence.

The braking system is equally impressive, featuring a 270mm front disc with a rigid caliper and a 240mm rear disc, delivering strong and consistent stopping power. The bike's ergonomics are designed for maximum rider comfort and control, with a flat seat, narrow fuel tank, and optimized handlebar position. Additionally, the compact bodywork and aggressive styling not only enhance the bike's aesthetics but also contribute to its aerodynamic efficiency.

Other notable features include a high-capacity radiator with a large core for improved cooling, a lightweight exhaust system with a compact silencer, and advanced electronics such as the Yamaha Power Tuner app, which allows riders to adjust engine mapping via their smartphone. Overall, the Yamaha YZ250FL YZ250F 2020 is engineered for peak performance, offering a powerful yet agile ride that meets the demands of modern motocross competition.

Yamaha YZ250FL YZ250F 2020 F.A.Q.

What is the recommended engine oil for the Yamaha YZ250F 2020?

The recommended engine oil for the Yamaha YZ250F 2020 is Yamalube 4-R 10W-40 or an equivalent high-quality 4-stroke engine oil.

How often should I change the air filter on my YZ250F?

It is recommended to clean or replace the air filter after every ride in dusty conditions or every 2-3 rides in normal conditions to ensure optimal performance.

What is the proper tire pressure for the YZ250F 2020?

The recommended tire pressure for the Yamaha YZ250F 2020 is typically 12-15 psi for both front and rear tires, but this can vary based on terrain and rider preference.

How can I troubleshoot starting issues with my YZ250F?

If your YZ250F is experiencing starting issues, check the spark plug for fouling, ensure the battery is fully charged, and verify that the fuel is fresh and reaching the engine.

How do I adjust the suspension on the YZ250F for different terrains?

To adjust the suspension, refer to the owner's manual for specific settings. Generally, for softer terrain, decrease compression damping, and for harder terrain, increase it. Always adjust in small increments and test ride.

What maintenance should be performed after each ride?

After each ride, clean the bike thoroughly, inspect the chain and sprockets, check tire pressure, and look for any loose bolts or unusual wear. Lubricate the chain as needed.

What is the correct valve clearance for the YZ250F 2020?

The correct valve clearance for the Yamaha YZ250F 2020 is 0.10-0.15 mm for the intake and 0.17-0.22 mm for the exhaust. Always check this when the engine is cold.

How can I improve the performance of my YZ250F?

To improve performance, consider upgrading the exhaust system, optimizing the ECU mapping, ensuring regular maintenance, and using high-quality fuels and lubricants.

What should I do if the engine overheats?

If the engine overheats, stop the bike immediately, allow it to cool down, check the coolant level, inspect for leaks, and ensure the radiator is clean and unobstructed.

How do I properly store my YZ250F for an extended period?

For long-term storage, clean the bike thoroughly, change the oil, drain the fuel or use a fuel stabilizer, disconnect the battery, and store it in a dry place with a cover to protect it from dust and moisture.