Yamaha YZ 125 Manuel utilisateur

B0V-28199-12LIT-11626-34-28

Read this manual carefully before operating this vehicle.

YZ125M2

OWNER’S MANUAL

YZ125

2021

PRINTED IN JAPAN

2020.05-0.4×1 !

(E)

B0V-28199-12_cover.indd 1-3 2020/04/30 14:40:38

Operating, servicing and

maintaining a passenger vehicle or off-road vehicle can

expose you to chemicals including engine exhaust,

carbon monoxide, phthalates, and lead, which are

known to the State of California to cause cancer and

birth defects or other reproductive harm. To minimize

exposure, avoid breathing exhaust, do not idle the

engine except as necessary, service your vehicle in a

well-ventilated area and wear gloves or wash your

hands frequently when servicing your vehicle. For more

information go to

www.P65Warnings.ca.gov/passenger-vehicle

QRead this manual carefully before operating this vehicle. This manual should stay with this vehicle

if it is sold.

EAM20160Genuine Yamaha Parts text

For your best ownership experience, think Genuine Yamaha!

Genuine Yamaha Parts – Genuine Yamaha replacement parts are the exact same parts as the ones

originally equipped on your vehicle, providing you with the performance and durability you have come

to expect. Why settle for aftermarket parts that may not provide full confidence and satisfaction?

Genuine Yamaha Accessories – Yamaha only offers accessories that meet our high standards for

quality and performance. Buy with confidence, knowing your Genuine Yamaha Accessories will fit right

and perform right – right out of the box.

Yamalube – Take care of your Yamaha with legendary Yamalube oils, lubricants, and care products.

They’re formulated and approved by the toughest judges we know: the Yamaha engineering teams that

know your Yamaha from the inside out.

Genuine Yamaha Service Manuals – Get the same factory manual for your vehicle that the techni-

cians at your authorized Yamaha dealer use. Service manuals are available through your Yamaha

dealer or you can order them directly through yamahapubs.com.

Genuine Yamaha products are available only from your Yamaha dealer.

Find out more at yamaha-motor.com

B0V-28199-12_cover.indd 4-6 2020/04/30 14:40:39

EAM20080

YZ125M2

OWNER’S MANUAL

First edition, May 2020

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, U.S.A.

is expressly prohibited.

P/N. LIT-11626-34-28

Printed in Japan.

EAM20180

IMPORTANT

Congratulations on your purchase of a Yamaha YZ series. This model is the culmination of Yamaha’s

vast experience in the production of pacesetting racing machines. It represents the highest grade of

craftsmanship and reliability that have made Yamaha a leader.

This manual explains operation, inspection, basic maintenance and tuning of your machine. If you have

any questions about this manual or your machine, please contact your Yamaha dealer.

TIP

•Yamaha continually seeks advancements in product design and quality. Therefore, while this manual

contains the most current product information available at the time of printing, there may be minor dis-

crepancies between your machine and this manual. If you have any questions concerning this man-

ual, please consult your Yamaha dealer.

•This manual is intended for those who have basic knowledge and skill concerning the servicing of

Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl-

edge and skill concerning servicing are requested not to undertake inspection, adjustment, disassem-

bly, or reassembly only by reference to this manual. It may lead to servicing trouble and mechanical

damage.

WARNING

EWA20270

PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS

MACHINE. DO NOT ATTEMPT TO OPERATE THIS MACHINE UNTIL YOU HAVE ATTAINED A

SATISFACTORY KNOWLEDGE OF ITS CONTROLS AND OPERATING FEATURES AND UNTIL

YOU HAVE BEEN TRAINED IN SAFE AND PROPER RIDING TECHNIQUES. REGULAR INSPEC-

TIONS AND CAREFUL MAINTENANCE, ALONG WITH GOOD RIDING SKILLS, WILL ENSURE

THAT YOU SAFETY ENJOY THE CAPABILITIES AND THE RELIABILITY OF THIS MACHINE.

EAM30001

IMPORTANT MANUAL INFORMATION

Particularly important information is distinguished in this manual by the following notations.

This is the safety alert symbol. It is used to alert you to potential per-

sonal injury hazards. Obey all safety messages that follow this symbol

to avoid possible injury or death.

A WARNING indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

A NOTICE indicates special precautions that must be taken to avoid

damage to the vehicle or other property.

A TIP provides key information to make procedures easier or clearer.

WARNING

NOTICE

TIP

EAM20162

YAMAHA MOTOR CORPORATION, U.S.A. YZ MOTORCYCLE LIMITED

WARRANTY

GENERAL INFORMATION 1

SPECIFICATIONS 2

PERIODIC CHECKS AND

ADJUSTMENTS 3

CHASSIS 4

ENGINE 5

ELECTRICAL SYSTEM 6

TROUBLESHOOTING 7

TUNING 8

EAM10003

TABLE OF CONTENTS

GENERAL INFORMATION

SAFETY INFORMATION ..................................................................................1-1

FOR SAFETY, BE SURE TO OBEY THE FOLLOWING:...........................1-1

LOCATION OF IMPORTANT LABELS.............................................................1-4

DESCRIPTION..................................................................................................1-5

IDENTIFICATION ..............................................................................................1-6

VEHICLE IDENTIFICATION NUMBER ......................................................1-6

ENGINE SERIAL NUMBER........................................................................1-6

INCLUDED PARTS ...........................................................................................1-7

SIDESTAND ...............................................................................................1-7

NIPPLE WRENCH......................................................................................1-7

VALVE JOINT.............................................................................................1-7

COLLAR (tool for YPVS) ............................................................................1-7

IMPORTANT INFORMATION ...........................................................................1-8

PREPARATION FOR REMOVAL AND DISASSEMBLY............................1-8

REPLACEMENT PARTS............................................................................1-8

INSTRUMENT AND CONTROL FUNCTIONS .................................................1-9

ENGINE STOP SWITCH ............................................................................1-9

SHIFT PEDAL.............................................................................................1-9

KICKSTARTER LEVER..............................................................................1-9

FRONT BRAKE LEVER .............................................................................1-9

REAR BRAKE PEDAL................................................................................1-9

FUEL COCK ...............................................................................................1-9

STARTER KNOB (CHOKE)......................................................................1-10

STARTING AND BREAK-IN ...........................................................................1-11

FUEL AND ENGINE MIXING OIL.............................................................1-11

STARTING A COLD ENGINE ..................................................................1-11

STARTING A WARM ENGINE .................................................................1-11

BREAK-IN PROCEDURES ......................................................................1-11

MAINTENANCE AFTER BREAK-IN ..............................................................1-13

MAJOR MAINTENANCE ..........................................................................1-13

AIR FILTER MAINTENANCE ...................................................................1-13

TORQUE-CHECK POINTS.............................................................................1-14

MOTORCYCLE CARE AND STORAGE.........................................................1-16

CARE........................................................................................................1-16

STORAGE ................................................................................................1-17

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