Yamaha SR125 1997 User manual

EB000000

SR125

SERVICE MANUAL

1996 by Yamaha Motor Co., Ltd.

1st Edition, September 1996

unauthorized use without the written

permission of Yamaha Motor Co., Ltd.

is expressly prohibited.

NOTE:

WARNING

CAUTION:

EB001000 NOTICE

This manual was produced by the Yamaha Motor Company primarily for use byYamaha 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-

torcycle has a basic understanding of the mechanical ideas and the procedures of motorcycle repair.

Repairs attempted by anyone without this knowledge are likely to render the motorcycle unsafe and

unfit for use.

YamahaMotorCompany,Ltd.,iscontinuallystrivingtoimproveallitsmodels.Modificationsandsignif-

icant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and

will appear in future aditions 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!

FailuretofollowWARNINGinstructionscouldresultin severe injuryor

deathtothemotorcycleoperator,abystanderorapersoninspectingor

repairing the motorcycle.

A CAUTION indicates special precautions that must be taken to avoid

damage to the motorcycle.

NOTE: A NOTE provides key information to make procedures easier or clearer.

YP002000 HOW TO USE THIS MANUAL

MANUAL ORGANIZATION

This manual consists of chapters for the main categories of subjects. (See “Illustrated symbols”)

1st title 1: This is the title of the chapter with its symbol on the upper right corner of each page.

2nd title 2: This title indicates the section of the chapter and only appears on the first page of each

section. It is located in the upper left corner of the page.

3rd title 3: This title indicates a sub-section that is followed by step-by-step procedures accompa-

nied by corresponding illustrations.

EXPLODED DIAGRAMS

Tohelpidentifypartsandclarifyproceduresteps,thereareexplodeddiagramsatstartofeachremoval

and disassembly section.

1. An easy-to-see exploded diagram 4is provided for disassembly and assembly jobs.

2. Numbers 5are given in the order of jobs in the exploded diagram. A number that is enclosed by a

circle indicates a disassembly step.

3. An explanation of jobs and notes is presented in an easy-to-read way by the use of symbol marks

6. The meanings of the symbol marks are given on the next page.

4. Ajobinstructionchart 7accompaniestheexplodeddiagram, providingtheorderofjobs, namesof

parts, notes in jobs, etc.

5. Forjobsrequiringmoreinformation,thestep-by-stepformatsupplements 8aregiveninadditionto

the exploded diagram and the job instruction chart.

23 24

2220

18 1917

1413

11 12

GEN

INFO SPEC

ENG

CARB

ELEC

CHAS

INSP

ADJ

TRBL

SHTG

EB003000

ILLUSTRATED SYMBOLS

Illustrated symbols 1to 9are designed as

thumb tabs to indicate the chapter’s number

and content.

1General information

2Specifications

3Periodic inspection and adjustment

4Engine

5Carburation

6Chassis

7Electrical

8Troubleshooting

Illustrated symbols 9to 16 are used to identify

the specifications appearing in the text.

9Possible to maintain with engine mounted

10 Filling fluid

11 Lubricant

12 Special tool

13 Tightening

14 Wear limit, clearance

15 Engine speed

16 Ω, V, A

Illustratedsymbols 17 to 22 in theexploded dia-

grams indicate the types of lubricants and lu-

brication points.

17 Apply engine oil

18 Apply gear oil

19 Apply molybodenum disulfide oil

20 Apply wheel bearing grease

21 Apply lightweight lithium-soap baes grease

22 Apply molybdenum disulfide grease

Illustratedsymbols 23 to 24 in theexploded dia-

gramsindicatethewheretoapplylockingagent

23 and when to install new parts 24 .

23 Apply locking agent (LOCTITE)

24 Use new one

GENERAL INFORMATION

SPECIFICATIONS

PERIODIC INSPECTION AND

ADJUSTMENT

ENGINE OVERHAUL

CARBURATION

CHASSIS

ELECTRICAL

TROUBLESHOOTING

GEN

INFO 1

SPEC 2

ENG 4

CARB 5

CHAS 6

ELEC 7

TRBL

SHTG 8

INSP

ADJ

INDEX

CHAPTER 1.

GENERAL INFORMATION

MOTORCYCLE IDENTIFICATION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FRAME SERIAL NUMBER 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

MODEL LABEL 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IMPORTANT INFORMATION 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PREPARATION FOR REMOVAL PROCEDURES 1-2. . . . . . . . . . . . . . .

REPLACEMENT PARTS 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GASKETS, OIL SEALS AND O-RINGS 1-2. . . . . . . . . . . . . . . . . . . . . . . .

LOCK WASHERS/PLATES AND COTTER PINS 1-3. . . . . . . . . . . . . . . .

BEARINGS AND OIL SEALS 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CIRCLIPS 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHECKING OF CONNECTIONS 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HOW TO USE THE CONVERSION TABLE 1-5. . . . . . . . . . . . . . . . . . . . . . . .

SPECIAL TOOLS 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of contents

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