Yamaha SR125 98 Manual

FOREWORD
This Supplementary Service Manual has been prepared to introduce new service and data for the
SR125’98.Forcompleteinformationonserviceprocedures,itisnecessarytousethisSupplementary
Service Manual together with following manual:
SR125 ’97 SERVICE MANUAL: 3MW-AE1
SR125 ’98
SUPPLEMENTARY
SERVICE MANUAL
1997 by Yamaha Motor Co., Ltd.
1st Edition July 1997
All rights reserved. Any reprinting or
unauthorized use without the written
permission of Yamaha Motor Co., Ltd.
is expressly prohibited.

NOTE:
CAUTION:
EB001000 NOTICE
This manual was produced by the Yamaha Motor Company primarily for use by Yamaha dealers and
their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual,
so it is assumed that anyone who uses this book to perform maintenance and repairs on Yamaha mo-
torcycleshas abasic understandingof themechanical ideasand theprocedures ofmotorcycle repair.
Repairs attempted by anyone without this knowledge are likely to render the motorcycle unsafe and
unfit for use.
YamahaMotorCompany,Ltd.iscontinuallystrivingtoimproveallitsmodels.Modificationsandsignifi-
cant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and
will appear in future editions of this manual where applicable.
Designs and specifications are subject to change without notice.
IMPORTANT INFORMATION
Particularly important information is distinguished in this manual by the following notations.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED!
FailuretofollowWARNINGinstructionscouldresultinsevereinjuryor deathto
the motorcycle operator, a bystander or a person inspecting or repairing the
motorcycle.
ACAUTION indicatesspecial precautionsthatmustbetaken toavoid damage
to the motorcycle.
NOTE: A NOTE provides key information to make procedures easier or clearer.

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HOW TO USE THIS MANUAL
CONSTRUCTION OF THIS MANUAL
This manual consists of chapters for the main categories of subjects. (See “Illustrated symbols”)
1st title 1: This is a chapter with its symbol on the upper right of each page.
2nd title 2: This title appears on the upper of each page on the left of the chapter symbol.
(For the chapter “Periodic inspection and adjustment” the 3rd title appears.)
3rd title 3: This is a final title.
MANUAL FORMAT
Alloftheproceduresinthismanualareorganizedinasequential,step-by-stepformat.Theinformation
has been compiled to provide the mechanic with an easy to read, handy reference that contains com-
prehensive explanations of all disassembly, repair, assemblyand inspections. A set of particularlyim-
portant procedure ( 4) is placed between aline of asterisks (*); with each procedure preceded by ().
IMPORTANT FEATURES
Data and a special tool are framed in a box preceded by a relevant symbol (5).
Anencirclednumeral( 6)indicatesapartname,andanencircledalphabeticalletterdataoranalign-
ment mark (7), the others being indicated by an alphabetical letter in a box (8).
A condition of a faulty component will precede an arrow symbol and course of action required the
symbol ( 9).
EXPLODED DIAGRAM
Eachchapterprovidesexplodeddiagramsbeforeeachdisassemblysectionforeaseinidentifyingcor-
rect disassembly and assembly procedures.