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Yamaha YZ 2020 Series User Manual

Yamaha YZ 2020 Series
376 pages
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BAJ-28199-10LIT-11626-33-34
Read this manual carefully before operating this vehicle.
YZ250FXL1
OWNER’S SERVICE MANUAL
YZ250FX
2020
PRINTED IN JAPAN
2019.07-0.8×1 !
(E)
2020
YZ250FXL1
BAJ-28199-10_cover_US_10mm_FCC.indd 1-3 2019/07/10 9:35:16

Table of Contents

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Yamaha YZ 2020 Series Specifications

General IconGeneral
ManufacturerYamaha
Fuel DeliveryCarburetor
IgnitionCDI
Final DriveChain
Tires (Front)80/100-21
Fuel Capacity2.1 gal
ModelYZ
Bore x Stroke66.4 mm x 72.0 mm
Fuel SystemKeihin PWK38S
Suspension (Front)KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Suspension (Rear)KYB® single shock; fully adjustable, 12.4-in travel
Brakes (Rear)Hydraulic single disc brake, 245 mm
Tires (Rear)110/90-19
Width32.5 in
Wet Weight227 lb

Summary

HOW TO USE THIS MANUAL

GENERAL INFORMATION

SAFETY INFORMATION

Provides essential safety precautions and guidelines for operating the motorcycle.

INSTRUMENT AND CONTROL FUNCTIONS

Explains the operation of all instruments and controls on the motorcycle.

STARTING AND BREAK-IN

Provides instructions for starting the engine and the break-in procedures.

MAINTENANCE AFTER BREAK-IN

TORQUE-CHECK POINTS

SPECIFICATIONS

ENGINE SPECIFICATIONS

Provides detailed technical specifications for the engine components.

CHASSIS SPECIFICATIONS

Lists detailed technical specifications for the chassis components.

ELECTRICAL SPECIFICATIONS

Provides detailed technical specifications for the electrical system components.

TIGHTENING TORQUES

Specifies tightening torques for standard fasteners and special components.

PERIODIC CHECKS AND ADJUSTMENTS

MAINTENANCE INTERVALS

Details recommended maintenance schedules for various components.

PRE-OPERATION INSPECTION AND MAINTENANCE

Covers essential checks before riding for break-in, practice, or race.

ENGINE

ENGINE REMOVAL

Provides step-by-step instructions for removing the engine assembly.

COOLING SYSTEM

FUEL SYSTEM

ELECTRICAL SYSTEM

FUEL INJECTION SYSTEM

Details circuit diagram, self-diagnostics, and troubleshooting for the fuel injection system.

TROUBLESHOOTING

TROUBLESHOOTING OF ENGINE (fault code not detected)

Addresses engine symptoms when no fault code is detected.

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE

Explains diagnostic codes and tables for self-diagnosis of the fuel injection system.

TUNING

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