Yamaha YZ450FX 2008 Owner's Manual

Yamaha YZ450FX 2008 manual cover
Pages 274
Year 2008
Language(s)
English en

Yamaha YZ450FX 2008 Specification

The Yamaha YZ450FX 2008 is a high-performance off-road motorcycle designed for enduro and cross-country racing. This model is equipped with a powerful 449cc, liquid-cooled, 4-stroke, DOHC engine that delivers robust torque and smooth power delivery, optimized for varied terrains. The engine features a five-valve titanium head, enhancing its breathing efficiency and overall performance. The fuel system is managed by a 39mm Keihin FCR flat-slide carburetor, ensuring precise fuel delivery and throttle response.

The YZ450FX's chassis is constructed from lightweight aluminum, providing an optimal balance of rigidity and flexibility. This design enhances the bike's handling and stability. The suspension system includes fully adjustable KYB front forks with 12.2 inches of travel and a fully adjustable KYB rear shock with 12.4 inches of travel, offering superior comfort and control over rough terrain.

Braking is managed by a 250mm front disc and a 245mm rear disc, delivering strong and consistent stopping power. The transmission is a five-speed wide-ratio gearbox, providing versatility for different riding conditions. The bike's ergonomics are designed with a focus on rider comfort and control, featuring an adjustable handlebar and a slim, lightweight seat.

With a fuel capacity of 2.1 gallons, the YZ450FX is suited for extended rides without frequent refueling. The overall weight of the bike is approximately 249 pounds, making it agile and easy to maneuver. The combination of high-end components and advanced engineering makes the Yamaha YZ450FX 2008 a competitive choice for serious off-road enthusiasts.

Yamaha YZ450FX 2008 F.A.Q.

What is the recommended oil type and capacity for the Yamaha YZ450FX 2008?

The recommended oil type for the Yamaha YZ450FX 2008 is 10W-40, and the oil capacity is approximately 1.1 liters (1.16 US quarts) when changing the oil and filter.

How often should I change the air filter on my Yamaha YZ450FX 2008?

It is advisable to inspect and clean the air filter after every ride, especially in dusty conditions, and replace it if it shows significant wear or damage.

What are the common signs of clutch wear on the Yamaha YZ450FX 2008?

Common signs of clutch wear include slipping under load, difficulty in gear shifting, and a spongy clutch lever feel. If these symptoms occur, inspect the clutch plates and springs for wear.

How can I adjust the suspension settings on the Yamaha YZ450FX 2008 for better performance?

To adjust the suspension settings, use the compression and rebound adjusters found on the forks and shock absorber. Consult the owner's manual for the recommended settings based on your weight and riding style.

What is the correct spark plug for the Yamaha YZ450FX 2008, and how often should it be replaced?

The correct spark plug for the Yamaha YZ450FX 2008 is NGK CR8E. It is recommended to inspect the spark plug every 6 months or sooner if the engine performance drops, and replace it if necessary.

How do I troubleshoot starting issues with the Yamaha YZ450FX 2008?

If the bike has starting issues, check the battery charge, inspect the spark plug, ensure the fuel is fresh, and verify that the kill switch is not engaged. If problems persist, consult a professional mechanic.

What regular maintenance should be performed on the Yamaha YZ450FX 2008's brakes?

Regular maintenance includes checking brake fluid levels, inspecting brake pads for wear, and ensuring that brake lines are free from leaks or damage. Replace pads and fluid as needed for optimal performance.

How can I improve the fuel efficiency of my Yamaha YZ450FX 2008?

To improve fuel efficiency, ensure the air filter is clean, the chain is properly lubricated, and the tire pressure is at the recommended level. Additionally, avoid aggressive riding styles that consume more fuel.

What should I do if the Yamaha YZ450FX 2008's engine overheats?

If the engine overheats, stop the bike immediately, allow it to cool, and check the coolant level. Ensure the radiator is not clogged with dirt or debris. If overheating persists, consult a mechanic.

How do I properly store the Yamaha YZ450FX 2008 during the off-season?

For off-season storage, clean the bike thoroughly, lubricate all moving parts, remove the battery and store it in a cool, dry place, and cover the bike to protect it from dust and moisture.