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
  - CLEANING AND STORAGE
- SPECIFICATIONS
  - GENERAL SPECIFICATIONS
  - MAINTENANCE SPECIFICATIONS
  - TIGHTENING TORQUES
  - LUBRICATION DIAGRAMS
  - 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
  - CAMSHAFTS
  - CYLINDER HEAD
  - VALVES AND VALVE SPRINGS
  - CYLINDER AND PISTON
  - CLUTCH
  - OIL FILTER ELEMENT AND WATER PUMP
  - BALANCER
  - OIL PUMP
  - KICK SHAFT AND SHIFT SHAFT
  - 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
  - THROTTLE POSITION SENSOR SYSTEM
- TUNING
  - ENGINE
  - CHASSIS

Yamaha YZ250FB 2012 Owner's Manual

Pages 284

Year 2012

Language(s)

of 284

Yamaha YZ250FB 2012 Specification

The Yamaha YZ250FB 2012 is a high-performance motocross motorcycle engineered for competitive racing and off-road adventures. This bike features a liquid-cooled, 4-stroke, DOHC, 250cc engine with a titanium five-valve cylinder head, designed to deliver consistent power and quick throttle response. The engine is paired with a five-speed, close-ratio transmission that provides smooth and precise gear shifts, optimizing performance across various terrains. The YZ250FB is built on an aluminum bilateral beam frame, which ensures a lightweight yet highly durable structure, enhancing both handling and stability.

The suspension system includes a fully adjustable KYB Speed-Sensitive System (SSS) front fork and a fully adjustable KYB rear shock, offering superior damping characteristics and the ability to fine-tune settings for different track conditions. The front suspension has a travel of 12.2 inches, while the rear offers 12.4 inches, ensuring maximum comfort and control. Braking is managed by a single 250mm front disc brake and a 245mm rear disc brake, providing reliable stopping power even under demanding conditions.

The bike's ergonomics are designed for rider comfort and control, featuring a slim seat, adjustable handlebar mounts, and gripper seat cover for improved rider movement. The YZ250FB also includes lightweight Excel rims and Dunlop Geomax tires, which enhance traction and durability. The fuel tank has a capacity of 1.8 gallons, balancing the need for extended riding periods without compromising the bike's lightweight nature. Overall, the Yamaha YZ250FB 2012 combines advanced engineering, durable construction, and rider-focused design, making it a formidable choice for motocross enthusiasts and professional riders alike.

Yamaha YZ250FB 2012 F.A.Q.

What is the recommended oil type for the Yamaha YZ250FB 2012?

The recommended engine oil for the Yamaha YZ250FB 2012 is Yamalube 4-R 10W-50 or equivalent high-performance oil that meets or exceeds JASO MA specifications.

How often should the air filter be cleaned on the YZ250FB?

It is advisable to clean the air filter after every race or every 2-3 rides, depending on the riding conditions. Dusty environments may require more frequent cleaning.

What is the correct valve clearance for the Yamaha YZ250FB 2012?

The intake valve clearance should be 0.10-0.15 mm and the exhaust valve clearance should be 0.20-0.25 mm. It's important to check and adjust these clearances as part of regular maintenance.

How can I troubleshoot starting issues with my YZ250FB?

Check the spark plug for wear or fouling, ensure the fuel is fresh and the fuel petcock is open, and inspect the air filter for blockage. If the issue persists, verify that the carburetor is clean and properly adjusted.

What is the recommended tire pressure for the YZ250FB?

For optimal performance, maintain a tire pressure of 12-15 psi in the front tire and 12-15 psi in the rear tire, adjusting as necessary for terrain and riding style.

How do I adjust the suspension on my YZ250FB for different terrains?

To adjust the suspension, refer to the owner's manual for baseline settings, then adjust the compression and rebound settings on the forks and shock to suit the specific terrain. Softer settings work well for rough terrain, while firmer settings are better for hard-packed tracks.

What is the proper chain tension for the Yamaha YZ250FB 2012?

The chain slack should be between 30-40 mm at the tightest point. Ensure the bike is on a stand and the rear wheel is off the ground when checking tension.

How do I change the coolant on the YZ250FB?

Drain the old coolant by removing the radiator cap and opening the drain bolt on the water pump. Flush with fresh water, then refill with a 50/50 mix of antifreeze and distilled water. Ensure no air is trapped by running the engine with the radiator cap off until the thermostat opens.

What spark plug type is recommended for the YZ250FB?

The recommended spark plug for the Yamaha YZ250FB 2012 is an NGK CR8E or equivalent. Ensure the gap is set to 0.7-0.8 mm for optimal performance.

How can I improve the braking performance on my YZ250FB?

Regularly check the brake pads for wear and replace them when necessary. Bleed the brake lines to remove air, and use high-quality brake fluid. Additionally, consider upgrading to stainless steel braided brake lines for improved feel and performance.