Contents

- GENERAL INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - MACHINE IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - CHECKING OF CONNECTION
  - SPECIAL TOOLS
  - CONTROL FUNCTIONS
  - MULTI-FUNCTION DISPLAY
  - 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
  - PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM
  - GENERAL MAINTENANCE AND LUBRICATION CHART
  - MAINTENANCE INTERVALS FOR COMPETITION USE
  - PRE-OPERATION INSPECTION AND MAINTENANCE
  - ENGINE
  - CHASSIS
  - ELECTRICAL
- TUNING
  - CHASSIS
- ENGINE
  - RADIATOR
  - CARBURETOR
  - AIR INDUCTION SYSTEM
  - 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
  - AC MAGNETO AND STARTER CLUTCH
  - 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
  - ELECTRIC STARTING SYSTEM
  - CHARGING SYSTEM
  - THROTTLE POSITION SENSOR SYSTEM
  - LIGHTING SYSTEM
  - SIGNALING SYSTEM

Yamaha WR450FY 2009 Owner's Manual

Pages 310

Year 2009

Language(s)

of 310

Yamaha WR450FY 2009 Specification

The Yamaha WR450FY 2009 is a high-performance off-road motorcycle engineered for durability and versatility across diverse terrains. It is powered by a robust 449cc, liquid-cooled, 4-stroke, DOHC engine, designed to deliver consistent power and torque. The engine features a five-valve head, titanium intake valves, and a Keihin FCR-MX39 flat-slide carburetor, ensuring precise fuel delivery and optimal performance. The WR450FY employs a wide-ratio five-speed transmission that provides smooth gear transitions and accommodates a variety of riding conditions, from tight trails to open tracks.

The motorcycle's chassis is constructed from lightweight aluminum, contributing to its agile handling and enhanced maneuverability. The suspension system includes fully adjustable front and rear suspension components, with 48mm forks at the front and a monocross shock at the rear, offering riders the ability to fine-tune settings for different terrains and riding styles. The WR450FY is also equipped with a high-capacity radiator and cooling fan to maintain optimal engine temperatures during rigorous riding.

Braking is handled by wave-style disc brakes, providing reliable stopping power and improved heat dissipation. The bike's ergonomics are designed for rider comfort and control, featuring a slim profile, a flat seat, and a handlebar-mounted trip computer with functions such as speed, distance, and time tracking. The fuel tank capacity is 8 liters, facilitating extended rides without frequent refueling stops. With its combination of advanced engineering, robust build quality, and rider-focused features, the Yamaha WR450FY 2009 stands out as a top choice for off-road enthusiasts seeking performance and reliability.

Yamaha WR450FY 2009 F.A.Q.

How often should I change the oil on my Yamaha WR450FY 2009?

It is recommended to change the oil every 15 hours of riding or every 500 miles, whichever comes first, under normal riding conditions.

What is the correct tire pressure for the Yamaha WR450FY 2009?

The recommended tire pressure is 15 psi for the front tire and 15 psi for the rear tire for optimal performance.

How do I adjust the suspension on my WR450FY 2009 for off-road riding?

To adjust the suspension, you can tweak the compression and rebound damping settings. For off-road, a softer setting generally improves traction and comfort. Refer to the manual for detailed adjustment procedures.

What spark plug type is suitable for the Yamaha WR450FY 2009?

The recommended spark plug is the NGK CR8E, which ensures optimal ignition and performance.

How can I troubleshoot starting issues with the WR450FY 2009?

Ensure the battery is fully charged, check the condition of the spark plug, and verify the fuel system is delivering fuel properly. Examine all electrical connections for corrosion or damage.

What is the valve clearance specification for the Yamaha WR450FY 2009?

The valve clearance should be checked and adjusted if necessary: 0.10-0.15 mm for the intake valves and 0.20-0.25 mm for the exhaust valves.

How do I clean and maintain the air filter on a WR450FY 2009?

Remove the air filter, wash it with a mild detergent, rinse thoroughly, and allow it to dry completely before applying air filter oil. Reinstall the filter ensuring it is seated correctly.

How can I improve the fuel efficiency of my Yamaha WR450FY 2009?

Ensure the bike is properly tuned, maintain correct tire pressure, use high-quality fuel, and adopt smooth riding techniques to enhance fuel efficiency.

What regular maintenance should be performed on the WR450FY 2009?

Regular maintenance includes checking and adjusting the chain tension, inspecting brake pads, changing oil and filter, checking coolant levels, and inspecting the tires for wear and pressure.

How do I adjust the chain tension on my Yamaha WR450FY 2009?

To adjust the chain tension, loosen the axle nut, adjust the chain adjusters equally on both sides to achieve 1.2-1.6 inches of slack, then retighten the axle nut securely.