Contents

- GENERAL INFORMATION
  - SAFETY INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - BASIC SERVICE INFORMATION
  - SPECIAL TOOLS
  - INSTRUMENT AND CONTROL FUNCTIONS
  - MULTI-FUNCTION DISPLAY
  - STARTING AND BREAK-IN
  - MAINTENANCE AFTER BREAK-IN
  - TORQUE-CHECK POINTS
  - MOTORCYCLE CARE AND STORAGE
- SPECIFICATIONS
  - GENERAL SPECIFICATIONS
  - ENGINE SPECIFICATIONS
  - CHASSIS SPECIFICATIONS
  - ELECTRICAL SPECIFICATIONS
  - TIGHTENING TORQUES
  - CABLE ROUTING DIAGRAM
- PERIODIC CHECKS AND ADJUSTMENTS
  - PERIODIC MAINTENANCE
  - PRE-OPERATION INSPECTION AND MAINTENANCE
  - ENGINE
  - CHASSIS
  - ELECTRICAL SYSTEM
- CHASSIS
  - GENERAL CHASSIS
  - FRONT WHEEL
  - REAR WHEEL
  - FRONT BRAKE
  - REAR BRAKE
  - HANDLEBAR
  - FRONT FORK
  - STEERING HEAD
  - REAR SHOCK ABSORBER ASSEMBLY
  - SWINGARM
  - CHAIN DRIVE
- ENGINE
  - LUBRICATION SYSTEM CHART AND DIAGRAMS
  - ENGINE REMOVAL
  - CAMSHAFT
  - CYLINDER HEAD
  - VALVES AND VALVE SPRINGS
  - CYLINDER AND PISTON
  - GENERATOR
  - STARTER CLUTCH
  - ELECTRIC STARTER
  - CLUTCH
  - SHIFT SHAFT
  - OIL PUMP
  - CRANKCASE
  - CRANKSHAFT AND BALANCER SHAFT
  - TRANSMISSION
- COOLING SYSTEM
  - COOLING SYSTEM DIAGRAMS
  - RADIATOR
  - WATER PUMP
- FUEL SYSTEM
  - FUEL TANK
  - THROTTLE BODY
- ELECTRICAL SYSTEM
  - IGNITION SYSTEM
  - ELECTRIC STARTING SYSTEM
  - CHARGING SYSTEM
  - SIGNALING SYSTEM
  - LIGHTING SYSTEM
  - COOLING SYSTEM
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
- TUNING
  - CHASSIS
- WIRING DIAGRAM

Yamaha WR450FM WR450F 2021 Owner's Manual

Pages 402

Year 2021

Language(s)

of 402

Yamaha WR450FM WR450F 2021 Specification

The Yamaha WR450F 2021 is a high-performance enduro motorcycle designed for both competitive racing and versatile off-road riding. Engineered with cutting-edge technology, it features a 450cc liquid-cooled, DOHC, 4-stroke, single-cylinder engine that delivers robust power and torque. The powerplant is paired with a 5-speed wide-ratio transmission, optimized for a range of conditions from tight trails to open terrain.

The WR450F's frame is crafted from lightweight aluminum, providing an excellent balance of strength and agility. It incorporates a bilateral beam design that enhances handling precision and rider comfort. Suspension duties are managed by a fully adjustable KYB fork at the front and a KYB shock at the rear, both offering customizable settings to suit various riding styles and terrains.

The motorcycle is equipped with advanced electronics, including a compact, high-resolution multi-function display and Yamaha’s proprietary Power Tuner app, which allows riders to make real-time adjustments to the engine mapping via a smartphone. The WR450F also comes with an electric start system and a high-capacity radiator with a cooling fan to ensure reliable performance in extreme conditions.

For braking, the WR450F uses a robust system with a 270mm front disc and a 245mm rear disc, ensuring strong and consistent stopping power. The bike's ergonomics are designed with the rider in mind, featuring a slim profile, narrow seat, and optimized handlebar positioning to maximize control and comfort.

Further enhancing its off-road capabilities, the WR450F includes an 18-inch rear wheel, high ground clearance, and durable, off-road-specific tires. With a wet weight of approximately 262 pounds and a fuel capacity of 2.2 gallons, the Yamaha WR450F 2021 offers a perfect blend of power, agility, and endurance for serious off-road enthusiasts.

Yamaha WR450FM WR450F 2021 F.A.Q.

What is the recommended oil type for the Yamaha WR450F 2021?

The recommended oil type for the Yamaha WR450F 2021 is Yamalube 4-R 10W-50 or an equivalent high-performance synthetic oil.

How often should I change the oil in my Yamaha WR450F 2021?

It is recommended to change the oil every 600 miles or 10 hours of riding, whichever comes first.

What is the proper tire pressure for the Yamaha WR450F 2021?

The recommended tire pressure is 15 psi for the front tire and 15 psi for the rear tire under normal riding conditions.

How can I adjust the suspension on my Yamaha WR450F 2021?

To adjust the suspension, use the compression and rebound clickers located on the front forks and rear shock. Refer to the owner’s manual for specific settings based on your riding style and weight.

What spark plug type is recommended for the Yamaha WR450F 2021?

The recommended spark plug type is NGK CR8E or a similar high-quality spark plug.

How do I clean the air filter on my Yamaha WR450F 2021?

Remove the air filter cover and take out the air filter. Clean it with a mild detergent and water, let it dry, then apply air filter oil before reinstalling.

What is the break-in period for the Yamaha WR450F 2021?

The break-in period is the first 600 miles or 10 hours of operation. During this time, avoid high RPMs, full-throttle starts, and aggressive riding.

How do I adjust the chain tension on my Yamaha WR450F 2021?

Loosen the axle nut and adjust the chain adjusters evenly on both sides until the chain has about 1.6 inches of slack at the midpoint. Tighten the axle nut to secure.

What is the correct coolant type for the Yamaha WR450F 2021?

Use a high-quality ethylene glycol antifreeze containing corrosion inhibitors suitable for aluminum engines. Yamaha recommends Yamaha Coolant or equivalent.

How can I troubleshoot starting issues with the Yamaha WR450F 2021?

Check the battery charge, inspect the spark plug, ensure the fuel is fresh, and verify that the kill switch is in the correct position. If issues persist, consult a professional technician.