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
  - AC MAGNETO
  - 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
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
- TUNING
  - CHASSIS
- WIRING DIAGRAM

Yamaha YZ250FK YZ250F 2019 Owner's Manual

Pages 376

Year 2019

Language(s)

of 376

Yamaha YZ250FK YZ250F 2019 Specification

The Yamaha YZ250FK YZ250F 2019 is a high-performance motocross motorcycle designed for competitive racing, featuring advanced engineering and cutting-edge technology. At its core, the bike is powered by a 250cc, liquid-cooled, DOHC, four-stroke engine that delivers robust power and torque across the RPM range. The engine is paired with a five-speed transmission, offering precise and smooth gear shifts essential for varying track conditions. The Yamaha YZ250F's fuel injection system ensures optimal fuel delivery, enhancing both performance and efficiency.

The chassis is constructed from Yamaha's proprietary bilateral beam aluminum frame, providing a perfect balance of rigidity and flexibility. This design enhances handling and stability, allowing riders to tackle aggressive terrains with confidence. The suspension system is equally impressive, featuring fully adjustable KYB® Speed-Sensitive System inverted front fork and a fully adjustable KYB® rear shock. These components offer excellent damping characteristics, ensuring superior comfort and control.

The braking system comprises front and rear disc brakes, delivering strong and consistent stopping power. The ergonomics of the Yamaha YZ250F are tailored for rider comfort and control, with a flat seat design that allows easy movement and a handlebar position that provides an optimal riding stance. The bike also incorporates a lightweight, compact, and centralized mass design that contributes to its exceptional agility.

Additional features include a high-compression cylinder head, a forward-positioned downdraft intake, and an electric starter for convenience. The Yamaha YZ250FK YZ250F 2019 stands out with its striking design, characterized by aggressive styling and durable graphics, making it not only a top performer but also a visually appealing machine. This model is engineered to meet the demands of professional racers and serious motocross enthusiasts alike.

Yamaha YZ250FK YZ250F 2019 F.A.Q.

What is the recommended engine oil for the Yamaha YZ250F 2019?

The recommended engine oil for the Yamaha YZ250F 2019 is Yamalube 4-R 10W-40 or a similar high-quality 4-stroke engine oil.

How often should I clean the air filter on my YZ250F 2019?

It's recommended to clean the air filter after every ride, especially if riding in dusty conditions, to ensure optimal performance.

What is the proper way to adjust the chain tension on the YZ250F 2019?

To adjust the chain tension, ensure there is 1.6 to 2.0 inches of slack at the tightest point. Use the chain adjusters on the swingarm to achieve the correct tension.

How can I troubleshoot starting issues with my YZ250F 2019?

Check the spark plug for wear, ensure the fuel is fresh, and verify that the battery is fully charged. Also, inspect for any clogged fuel lines.

What type of coolant should be used in the YZ250F 2019?

Use a high-quality ethylene glycol-based coolant with corrosion inhibitors for aluminum engines, like Yamaha's Performance Coolant.

How do I maintain the suspension on my YZ250F 2019?

Regularly inspect the fork seals for leaks, clean and lubricate the suspension linkages, and adjust the settings according to the riding conditions and rider weight.

What should I do if the brakes on my YZ250F 2019 feel spongy?

Check for air in the brake lines and bleed them if necessary. Also, inspect the brake pads for wear and ensure the brake fluid is at the correct level.

How can I improve the performance of my YZ250F 2019?

Regular maintenance, including timely oil changes, air filter cleaning, and spark plug checks, can enhance performance. Consider aftermarket exhaust systems and tuning for further improvements.

What is the proper tire pressure for the YZ250F 2019?

The recommended tire pressure for the YZ250F 2019 is typically around 12-15 psi for both front and rear tires, depending on terrain and rider preference.

How do I check the valve clearance on my YZ250F 2019?

To check the valve clearance, remove the valve cover and use a feeler gauge to measure the gap between the valve stem and rocker arm. Adjust if necessary according to the specifications in the service manual.