Yamaha YFZ450RY YFZ 450R 2009 Owner's Manual

Yamaha YFZ450RY YFZ 450R 2009 manual cover

Pages 164

Year 2009

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Yamaha YFZ450RY YFZ 450R 2009 Specification

The Yamaha YFZ450RY YFZ 450R 2009 is a high-performance all-terrain vehicle (ATV) designed for competitive racing and off-road enthusiasts. It is powered by a 449cc liquid-cooled, four-stroke engine with a DOHC (Double Overhead Camshaft) configuration, providing robust power and torque. This advanced engine is equipped with a five-valve cylinder head, enhancing airflow and combustion efficiency. The fuel delivery system utilizes a 42mm Mikuni® BSR carburetor, ensuring precise fuel-air mixture and optimal performance across varying conditions. The YFZ450R features a five-speed manual transmission with a wet multi-plate clutch, offering smooth and responsive gear shifts for superior control.

The chassis is constructed from a lightweight aluminum frame combined with a steel subframe, delivering a balance of strength and agility. The suspension system includes long-travel front and rear shocks with adjustable preload, compression, and rebound damping, providing exceptional handling and comfort over rough terrain. The front suspension features independent double wishbones with 9.8 inches of travel, while the rear utilizes a swingarm with 11 inches of travel. The braking system comprises dual hydraulic disc brakes at the front and a single hydraulic disc brake at the rear, ensuring reliable stopping power.

Ergonomically designed for rider comfort, the YFZ450R includes a narrow seat, adjustable handlebars, and well-placed foot pegs, facilitating optimal rider positioning and reduced fatigue. The ATV is equipped with 21-inch front and 20-inch rear tires, mounted on aluminum wheels, offering excellent traction and stability. Its aggressive styling, combined with advanced engineering, makes the Yamaha YFZ450RY YFZ 450R 2009 a formidable choice for serious riders seeking high performance and reliability in diverse off-road environments.

Yamaha YFZ450RY YFZ 450R 2009 F.A.Q.

What is the recommended oil type and capacity for the Yamaha YFZ450R 2009?

The recommended oil type for the Yamaha YFZ450R 2009 is 10W-40, and the oil capacity is approximately 1.95 liters (2.06 US quarts) when changing the oil and filter.

How often should the air filter be cleaned or replaced on the Yamaha YFZ450R 2009?

The air filter should be cleaned every 20 hours of operation, and it should be replaced if damaged or after long periods of use to ensure optimal engine performance.

What is the correct procedure for adjusting the chain tension on the Yamaha YFZ450R 2009?

To adjust the chain tension, first use a chain adjuster tool to loosen the axle nut. Then, turn the adjuster bolts on each side equally until the chain has 1.2 to 1.6 inches of slack. Tighten the axle nut securely after adjusting.

How can I troubleshoot starting issues with my Yamaha YFZ450R 2009?

If the YFZ450R is not starting, check the battery charge, inspect the spark plug for wear or fouling, ensure fuel is reaching the engine, and verify that the kill switch is in the 'run' position.

What are the steps to properly winterize the Yamaha YFZ450R 2009?

To winterize the YFZ450R, clean the ATV thoroughly, change the oil and filter, add a fuel stabilizer to the tank, disconnect the battery, and store the ATV in a dry, covered area.

How do I adjust the suspension settings on the Yamaha YFZ450R 2009 for different terrains?

Adjust the suspension settings using the preload adjuster, compression, and rebound damping according to the terrain. Softer settings are recommended for rough terrains, while firmer settings suit smoother surfaces.

What should I do if the Yamaha YFZ450R 2009 overheats during use?

If the ATV overheats, stop riding and allow the engine to cool down. Check the coolant level and ensure the radiator is clean and free from obstructions. Consider inspecting the thermostat and water pump if overheating persists.

How can I improve the performance of my Yamaha YFZ450R 2009?

To enhance performance, consider installing a high-flow air filter, aftermarket exhaust system, and re-jetting the carburetor. Regular maintenance and tuning are also crucial for optimal performance.

What are common signs of clutch wear on the Yamaha YFZ450R 2009?

Common signs of clutch wear include slipping under acceleration, a spongy clutch lever feel, and difficulty shifting gears. If these symptoms occur, inspect and replace the clutch plates if necessary.

How do I check and adjust the valve clearance on the Yamaha YFZ450R 2009?

To check and adjust valve clearance, remove the valve cover, use a feeler gauge to measure the gap between the cam lobes and the valve shims, and adjust by replacing the shims if necessary. Ensure the engine is cold before performing this task.