Yamaha YZ450FY 2009 Owner's Manual

Yamaha YZ450FY 2009 manual cover
Pages 278
Year 2009
Language(s)
English en

Yamaha YZ450FY 2009 Specification

The Yamaha YZ450FY 2009 is a high-performance motocross bike designed for competitive racing and advanced off-road riding. It features a potent 449cc liquid-cooled, four-stroke, single-cylinder engine that delivers robust power and torque across a wide RPM range. The engine incorporates a five-valve DOHC configuration and a titanium intake valve system, optimizing fuel intake and exhaust efficiency.

The bike is equipped with a five-speed transmission system, offering precise gear shifting and improved control over various terrains. Its chassis is constructed from an aluminum bilateral beam frame, which provides an optimal balance of rigidity and flexibility, enhancing handling and stability. The suspension system consists of a fully adjustable front fork with 48mm tubes and a rear shock absorber with a linkage-type Monocross system, both designed to absorb impacts and maintain traction over rough surfaces.

The braking system includes a hydraulic disc brake setup with a 250mm front disc and a 245mm rear disc, ensuring reliable stopping power. The YZ450FY 2009 features a lightweight, ergonomic design with a seat height of 39.1 inches and a ground clearance of 14.4 inches, making it suitable for aggressive riding styles. The fuel tank capacity is 1.8 gallons, supporting extended riding sessions without frequent refueling.

Additional features include a digital CDI ignition system for precise timing and a high-capacity radiator for efficient cooling. The bike's overall weight is approximately 245 pounds, contributing to its agility and responsiveness. The Yamaha YZ450FY 2009 is engineered to deliver exceptional performance, durability, and rider comfort, making it a formidable choice for serious motocross enthusiasts.

Yamaha YZ450FY 2009 F.A.Q.

What is the recommended oil type and capacity for the Yamaha YZ450FY 2009?

The recommended oil type is 10W-40, and the capacity is approximately 1.1 liters (1.16 US qt) when changing the oil and oil filter.

How often should I clean the air filter on my Yamaha YZ450FY 2009?

It's recommended to clean the air filter after every ride in dusty conditions and every 2-3 rides in normal conditions to ensure optimal engine performance.

What is the correct valve clearance for the Yamaha YZ450FY 2009?

The intake valve clearance should be 0.10-0.15 mm and the exhaust valve clearance should be 0.20-0.25 mm.

How do I troubleshoot a starting issue with the Yamaha YZ450FY 2009?

Check the fuel supply, ensure the spark plug is in good condition, inspect the ignition system, and verify the battery is charged. If the problem persists, consult a professional.

What is the proper tire pressure for the Yamaha YZ450FY 2009?

The recommended tire pressure is approximately 12 psi for the front and 12 psi for the rear tire. Adjust based on terrain and rider preference.

How can I maintain the chain on my Yamaha YZ450FY 2009?

Regularly clean and lubricate the chain every 300-500 miles or after riding in wet/muddy conditions. Adjust the tension to allow 1.2-1.6 inches of slack.

What should I do if my Yamaha YZ450FY 2009 overheats?

Stop the engine immediately, allow it to cool, and check the coolant level. Inspect the radiator for damage or blockage, and ensure proper airflow.

How often should I replace the spark plug on my Yamaha YZ450FY 2009?

Replace the spark plug every 12 months or every 8,000 km (5,000 miles) to maintain optimal performance.

What is the process for winterizing a Yamaha YZ450FY 2009?

Clean the bike thoroughly, change the oil, add a fuel stabilizer, disconnect the battery, and store the bike in a dry, covered location.

How can I improve the suspension settings on my Yamaha YZ450FY 2009?

Adjust the fork and shock settings based on your weight and riding style. Start with the manufacturer's baseline and make small adjustments to compression and rebound as needed.