Contents

- GENERAL INFORMATION
  - SAFETY INFORMATION
  - LOCATION OF IMPORTANT LABELS
  - DESCRIPTION
  - IDENTIFICATION
  - INCLUDED PARTS
  - IMPORTANT INFORMATION
  - BASIC SERVICE INFORMATION
  - SPECIAL TOOLS
  - INSTRUMENT AND CONTROL FUNCTIONS
  - 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
  - MAINTENANCE INTERVALS
  - 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
  - FUEL INJECTION SYSTEM
  - FUEL PUMP SYSTEM
  - ELECTRICAL COMPONENTS
- TROUBLESHOOTING
  - TROUBLESHOOTING
  - SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
- TUNING
  - CHASSIS
- WIRING DIAGRAM

Yamaha YZ250FXM YZ250FX 2021 Owner's Manual

Yamaha YZ250FXM YZ250FX 2021 manual cover

Pages 378

Year 2021

Language(s)

of 378

Yamaha YZ250FXM YZ250FX 2021 Specification

The Yamaha YZ250FXM YZ250FX 2021 is a high-performance off-road motorcycle engineered for cross-country racing and trail riding. This model boasts a liquid-cooled, 4-stroke, DOHC, 4-valve, 250cc engine, designed to deliver robust power across a broad RPM range. The engine is equipped with Yamaha's proprietary fuel injection system, which ensures optimal fuel delivery and efficiency under various riding conditions. It also features an electric starter with a high-capacity lithium-ion battery, providing reliable and quick start-ups.

The YZ250FXM YZ250FX 2021 is built on an advanced aluminum bilateral beam frame, offering a perfect balance of rigidity and flex for enhanced handling, stability, and rider feedback. The suspension system comprises a fully adjustable KYB® coil spring-type fork and a KYB® rear shock with a linkage system, ensuring superior traction and comfort over rough terrain. The bike's braking system includes a 270mm front disc and a 245mm rear disc, delivering exceptional stopping power and control.

Additional features include an 18-inch rear wheel and a 21-inch front wheel, both fitted with off-road tires designed for maximum traction and durability. The wide-ratio 6-speed transmission allows for seamless gear transitions, catering to a variety of riding scenarios from tight trails to open fields. The ergonomics are carefully crafted to provide rider comfort during long rides, with a handlebar, seat, and footpeg configuration that promotes a natural riding posture. The motorcycle's compact fuel tank holds approximately 2.15 gallons, providing ample range for extended outings.

Overall, the Yamaha YZ250FXM YZ250FX 2021 is a versatile and powerful machine, ideal for both competitive racing and recreational off-road adventures. Its combination of advanced engineering and practical features makes it a standout choice in the off-road motorcycle category.

Yamaha YZ250FXM YZ250FX 2021 F.A.Q.

What is the recommended maintenance schedule for the Yamaha YZ250FX 2021?

Regular maintenance for the Yamaha YZ250FX 2021 includes checking the air filter and oil levels every ride, changing the oil every 10 hours of use, and inspecting the chain tension and brake pads every few rides.

How do I troubleshoot starting issues with my Yamaha YZ250FX 2021?

If your Yamaha YZ250FX 2021 has starting issues, check the fuel level, ensure the battery is charged, inspect the spark plug for wear or fouling, and verify that the kill switch is not engaged.

What type of oil should I use for my Yamaha YZ250FX 2021?

The recommended oil for the Yamaha YZ250FX 2021 is Yamalube 10W-40 or any equivalent high-quality, synthetic motorcycle oil that meets or exceeds JASO MA standards.

How can I adjust the suspension settings on my Yamaha YZ250FX 2021 for trail riding?

To adjust the suspension for trail riding, soften the front and rear suspension by reducing compression damping and rebound damping. Refer to the owner's manual for specific settings adjustments based on rider weight and terrain.

What is the correct tire pressure for the Yamaha YZ250FX 2021?

For optimal performance, maintain a tire pressure of 12 psi in the front tire and 12-14 psi in the rear tire, depending on the terrain and rider preference.

How do I clean and maintain the air filter on my Yamaha YZ250FX 2021?

To clean the air filter, remove it from the bike, wash it with a mild detergent, rinse thoroughly, and allow it to dry completely. Apply air filter oil before reinstalling to ensure proper filtration.

What should I do if my Yamaha YZ250FX 2021 overheats?

If your bike overheats, stop immediately and let it cool down. Check the coolant level, inspect the radiator for blockages, and ensure that the cooling fan is operational.

How do I adjust the chain tension on my Yamaha YZ250FX 2021?

To adjust the chain tension, place the bike on a stand, loosen the axle nut, adjust the chain tensioner bolts evenly on both sides until there's about 1.2-1.6 inches of slack, then retighten the axle nut.

What type of spark plug is recommended for the Yamaha YZ250FX 2021?

The recommended spark plug for the Yamaha YZ250FX 2021 is the NGK CR8E. Ensure it is properly gapped to 0.7-0.8 mm before installation.

How do I replace the brake pads on my Yamaha YZ250FX 2021?

To replace the brake pads, remove the brake caliper, slide out the old pads, clean the caliper, insert the new pads, and reinstall the caliper. Ensure that the brake lever feels firm and check for proper operation before riding.