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Yamaha YZ250FX 2022 User Manual

Yamaha YZ250FX 2022
378 pages
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Read this manual carefully before operating this vehicle.
2022
OWNER’S SERVICE MANUAL
YZ250FX
YZ250FXN
LIT-11626-35-33 BAJ-2819U-12

Table of Contents

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Yamaha YZ250FX 2022 Specifications

General IconGeneral
Displacement250cc
Bore x Stroke77.0mm x 53.6mm
Compression Ratio13.8:1
IgnitionTCI: Transistor Controlled Ignition
Final DriveChain
Front SuspensionKYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel
Front BrakeHydraulic disc, 270mm
Rear BrakeHydraulic disc, 245mm
Seat Height37.6 in
Ground Clearance12.8 in
Fuel Capacity2.2 gal
Wet Weight247 lb
Engine TypeLiquid-cooled DOHC 4-stroke
Transmission6-speed
Rear SuspensionKYB® single shock; fully adjustable, 12.5-in travel
Front Tire80/100-21
L x W x H32.5 in x 50.0 in
Fuel DeliveryFuel Injection
Rear Tire110/100-18

Summary

General Information

Safety Information

Critical safety instructions and responsibilities for the owner, including safe riding practices.

Important Information

Guidelines for preparing before disassembly, using genuine parts, and handling seals.

Special Tools

Lists special tools required for accurate adjustment and assembly procedures.

Instrument and Control Functions

Explains the purpose and operation of various instruments and controls on the motorcycle.

Starting and Break-In

Details the initial starting procedure and break-in process for the vehicle.

Specifications

Engine Specifications

Lists detailed specifications for engine components and systems.

Chassis Specifications

Details specifications for the chassis, wheels, tires, and suspension.

Electrical Specifications

Lists electrical system specifications including voltage, coils, and fuses.

Tightening Torques

Provides general and specific torque values for fasteners, categorized by component.

Periodic Checks and Adjustments

Maintenance Intervals

Provides a schedule for regular maintenance tasks based on usage intervals.

Pre-Operation Inspection and Maintenance

Outlines essential checks to perform before operating the motorcycle.

Engine

Covers engine-related checks and adjustments, including valve clearance and oil.

Chassis

Details checks and adjustments for chassis components like brakes, wheels, and steering.

Chassis

Front Wheel

Procedures for removing, disassembling, checking, and installing the front wheel.

Rear Wheel

Procedures for removing, disassembling, checking, and installing the rear wheel.

Front Brake

Detailed procedures for servicing the front brake system, including caliper and master cylinder.

Rear Brake

Detailed procedures for servicing the rear brake system, including caliper and master cylinder.

Front Fork

Procedures for removing, disassembling, checking, and assembling front fork legs.

Steering Head

Steps for removing, checking, and installing the steering head components.

Engine

Lubrication System Chart and Diagrams

Diagrams illustrating the engine oil lubrication system and paths.

Engine Removal

Detailed steps for removing the engine from the motorcycle.

Camshaft

Procedures for removing, checking, and installing the camshaft assembly.

Cylinder Head

Steps for removing, checking, and installing the cylinder head assembly.

Valves and Valve Springs

Procedures for removing, checking, and installing valves, springs, and related components.

Cylinder and Piston

Steps for removing, checking, and installing the cylinder and piston assembly.

Clutch

Detailed procedures for removing, checking, and installing the clutch assembly.

Cooling System

Cooling System Diagrams

Diagrams illustrating the cooling system components and layout.

Radiator

Procedures for removing, checking, and installing the radiator.

Water Pump

Steps for disassembling, checking, and assembling the water pump.

Fuel System

Fuel Tank

Procedures for removing and installing the fuel tank and fuel pump assembly.

Throttle Body

Procedures for removing, checking, and adjusting the throttle body and related sensors.

Electrical System

Ignition System

Information on the ignition system, including circuit diagram and troubleshooting.

Electric Starting System

Details on the electric starting system, circuit diagram, and troubleshooting.

Charging System

Information on the charging system, including circuit diagram and troubleshooting.

Fuel Injection System

Information on the fuel injection system, circuit diagram, and troubleshooting.

Electrical Components

Identifies and describes various electrical components and their checks.

Troubleshooting

Troubleshooting of Engine (fault code not detected)

Troubleshooting engine issues when no fault code is present, covering starting problems.

Troubleshooting of Clutch

Troubleshooting common clutch problems such as slippage, drags, and noise.

Troubleshooting of Transmission

Troubleshooting common transmission issues like shifting difficulty and gear jumps.

Troubleshooting of Cooling System

Troubleshooting cooling system problems like overheating and water pump noise.

Troubleshooting of Brake

Diagnosing and fixing poor performance of disc brakes.

Troubleshooting of Suspension

Troubleshooting suspension performance issues for front fork and rear shock absorber.

Troubleshooting of Steering/Handling

Troubleshooting steering and handling problems like wobble, heavy steering, and vibration.

Self-Diagnostic Function and Diagnostic Code Table

Tables for self-diagnostic codes and sensor/actuator operations.

Tuning

Chassis

Chassis-related tuning adjustments, including sprockets and tire pressure.

Front Fork Setting

Adjustments for front fork characteristics like air spring, oil amount, and damping.

Rear Suspension Setting

Guidelines for setting rear suspension preload and damping.

Suspension Setting (Front Fork)

Table of adjustments for front fork symptoms like stiffness and bottoming out.

Suspension Setting (Rear Shock Absorber)

Table of adjustments for rear shock absorber symptoms like sinking and sponginess.

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