Yamaha YZ450FK YZ450F 2019 Owner's Manual

Yamaha YZ450FK YZ450F 2019 manual cover
Pages 368
Year 2019
Language(s)
English en

Yamaha YZ450FK YZ450F 2019 Specification

The Yamaha YZ450FK YZ450F 2019 is a high-performance motocross bike designed for competitive racing and off-road enthusiasts. This model features a potent 449cc liquid-cooled DOHC 4-stroke engine, delivering robust power and torque ideal for challenging terrains. The engine incorporates a rearward-slanted cylinder design which enhances mass centralization, improving handling and stability. A key highlight is the advanced Yamaha Power Tuner app, which allows riders to wirelessly adjust fuel and ignition mappings directly from their smartphone, providing a customizable riding experience tailored to varying track conditions.

The YZ450F boasts a bilateral beam aluminum frame, engineered to provide optimal rigidity and balance for superior agility and responsiveness. The front suspension consists of a KYB speed-sensitive system with fully adjustable forks, while the rear utilizes a KYB shock absorber, ensuring exceptional traction and comfort across diverse surfaces. This model is equipped with a lightweight, compact electric starter for quick and effortless ignition, complementing its high-performance lithium-ion battery.

Ergonomically, the YZ450F features a redesigned seat, handlebar position, and narrower bodywork to enhance rider comfort and control. Its braking system includes robust front and rear disc brakes, offering precise stopping power. The bike also comes with 21-inch front and 19-inch rear wheels fitted with Dunlop MX33 tires, providing excellent grip and durability. With a wet weight of approximately 245 pounds and a fuel capacity of 1.6 gallons, the Yamaha YZ450FK YZ450F 2019 is engineered to deliver a competitive edge in motocross racing, combining cutting-edge technology with Yamaha's renowned reliability and performance.

Yamaha YZ450FK YZ450F 2019 F.A.Q.

How do I properly break in the engine on my Yamaha YZ450F 2019?

To break in the engine, start by warming it up gently. Avoid high RPMs and heavy loads for the first 2-3 hours of operation. Gradually increase the throttle while avoiding prolonged idling. Change the oil after the initial break-in period.

What type of oil is recommended for the Yamaha YZ450F 2019?

Use a high-quality 4-stroke motorcycle oil with a viscosity rating of 10W-40. Ensure the oil meets or exceeds the specifications set by Yamaha for optimal performance and engine protection.

How can I troubleshoot starting issues with my Yamaha YZ450F 2019?

Check the fuel level, battery charge, and spark plug condition. Ensure the engine cutoff switch is in the correct position. Inspect the fuel lines for blockages and verify that the air filter is clean.

How often should I clean the air filter on my Yamaha YZ450F 2019?

Clean the air filter after every 3-5 hours of riding, or more frequently if riding in particularly dusty or muddy conditions. A clean air filter ensures optimal engine performance and longevity.

What is the recommended tire pressure for the Yamaha YZ450F 2019?

The recommended tire pressure is generally 12 psi for both front and rear tires, but it may vary based on terrain and rider preference. Adjust as necessary for specific conditions.

How do I adjust the suspension settings on my Yamaha YZ450F 2019?

Consult the owner's manual for baseline settings. Use the clickers on the front forks and rear shock to adjust compression and rebound. Make small adjustments and test ride to find the optimal setup for your weight and terrain.

What should I do if the clutch feels stiff on my Yamaha YZ450F 2019?

Inspect the clutch cable for any signs of damage or wear. Lubricate the cable and adjust the cable tension. If stiffness persists, check the clutch lever and basket for wear and replace components if necessary.

How can I check if the chain tension is correct on my Yamaha YZ450F 2019?

Place the bike on a stand and measure the chain slack midpoint between the sprockets. Proper tension should allow about 1.2-1.6 inches of slack. Adjust the tension using the axle adjusters if necessary.

What is the recommended spark plug for the Yamaha YZ450F 2019?

The recommended spark plug is an NGK LMAR9E-J. Ensure it is gapped correctly according to the specifications in the owner's manual for optimal performance.

How do I perform a coolant change on my Yamaha YZ450F 2019?

Ensure the engine is cool before draining the coolant. Remove the radiator cap and drain bolt. Allow the system to empty completely. Refill with a high-quality coolant, ensuring no air is trapped in the system, and check for leaks.