Yamaha YZ450FL YZ450F 2020 Owner's Manual

Yamaha YZ450FL YZ450F 2020 manual cover
Pages 364
Year 2020
Language(s)
English en

Yamaha YZ450FL YZ450F 2020 Specification

The Yamaha YZ450F 2020, also referred to as the YZ450FL, stands as a pinnacle of motocross engineering, embodying advanced technology and superior performance. At its heart lies a potent 449cc liquid-cooled, DOHC four-stroke engine, designed to deliver exceptional power and torque across a broad RPM range. This powerplant is paired with a five-speed transmission, offering smooth and precise gear shifts essential for competitive racing.

The chassis of the YZ450F is crafted from lightweight aluminum, ensuring an optimal balance of rigidity and flexibility. This enhances handling and provides a responsive riding experience. The bike is equipped with a class-leading suspension system, featuring KYB® spring-type forks with speed-sensitive damping and a linkage-type, fully adjustable KYB® rear shock. This setup ensures superior stability and control over varied terrains.

The Yamaha YZ450F 2020 also integrates state-of-the-art electronics, including a launch control system for optimized race starts and a wireless Power Tuner app that allows riders to adjust engine mapping via their smartphone. The bike features a compact, centralized fuel tank and a high-performance braking system with 270mm front and 245mm rear disc brakes for powerful stopping performance.

Ergonomically, the YZ450F is designed for rider comfort and control, with a flatter seat, narrower body, and optimized handlebar positioning. The combination of these elements ensures that the Yamaha YZ450F 2020 not only meets but exceeds the demands of modern motocross competition, offering riders a machine that is both incredibly powerful and remarkably agile.

Yamaha YZ450FL YZ450F 2020 F.A.Q.

What is the recommended engine oil type and capacity for the Yamaha YZ450FL YZ450F 2020?

The recommended engine oil type for the Yamaha YZ450FL YZ450F 2020 is Yamalube 4-R 10W-40 or an equivalent motor oil. The oil capacity is approximately 1.1 liters (1.16 US qt) after draining the engine.

How often should the air filter be cleaned or replaced?

The air filter should be inspected and cleaned after every ride in dusty conditions. In normal conditions, it should be checked and cleaned every 2-3 rides. Replace the air filter if it shows signs of wear or damage.

What is the correct tire pressure for the Yamaha YZ450FL YZ450F 2020?

The recommended tire pressure for the Yamaha YZ450FL YZ450F 2020 is 15 psi (103 kPa) for both the front and rear tires. Adjust the pressure based on the terrain and riding conditions.

How do I properly adjust the chain tension on my YZ450F?

To adjust the chain tension, ensure the bike is on a stand. Loosen the rear axle nut and adjust the chain adjusters equally on both sides until there's 1.2-1.6 inches (30-40 mm) of slack at the mid-point of the chain. Retighten the axle nut securely.

What should I do if the bike won't start?

If your Yamaha YZ450FL YZ450F 2020 won't start, check the fuel level, ensure the kill switch is in the "Run" position, inspect the spark plug for fouling, and verify that the battery is charged. Additionally, confirm that the fuel line is unobstructed.

How often should the valve clearance be checked on the YZ450F?

Valve clearance should be checked initially after the first 30 hours of operation and then every 60 hours thereafter. Adjustments should only be made if the clearance is out of specification.

What is the proper way to clean the fuel injector on a Yamaha YZ450F?

To clean the fuel injector, remove it from the engine, and use a specialized fuel injector cleaner. Follow the manufacturer's instructions for cleaning, ensuring no contaminants enter the fuel system during reinstallation.

How can I troubleshoot electrical issues on my YZ450FL YZ450F?

For electrical issues, check the battery connections for tightness and corrosion, inspect all fuses, and verify the condition of the wiring harness for any visible damage. Utilize a multimeter to test for continuity and proper voltage.

What maintenance should be performed before and after each riding session?

Before each ride, check the tire pressure, chain tension, and fluid levels. After riding, clean the bike thoroughly, inspect for any damage, and lubricate the chain. Regular maintenance helps ensure the bike's longevity and performance.

How do I adjust the suspension settings on my Yamaha YZ450F for different terrains?

To adjust the suspension, use the clickers on the forks and shock absorber. For softer settings, turn the clickers counterclockwise; for firmer settings, turn them clockwise. Refer to the owner's manual for specific recommendations based on terrain type.