Yamaha QT50 Manuale utente

o·

YAMAHA

.·

JLB-28197-

NOTICE

This manual has been

written

oto

r Company

for

use

by Yamaha

Auth

orized

qualifiedYamaha Dealers and their

mechani

. In

light

this purpose

been assumed

that

certain basi

mechanical

precepts and procedures inherent

our

pro

duct

are already

and understood

the reader. This service manual has been

written

acquaint

the

mechanic

with

com

mon

disassembly. inspection. reassembly.

maintenance. and

troub

leshooting

pro

cedures associated

with

this

machine.

The Research. Engineering. and Service De-

partment

Yamaha are continually striving

further improve all models manufactured

the

company.

Modifi

tions

are therefore

inevitable and

significant

changes in specifi-

cations

procedures

will

be forwarded-

all Au

thor

ized Yamaha Dealers and

will

ere applicable. appe

future edi

tions

this manual.

Particularly

important

information

is dis-

tingui

shed

this manual

the

following

notations:

NOTE

A NO

provides key

info

mat

make

_Procedures easier

clearer.

CAUTION

A CAUTION indicates special procedures

must

followed

avoid damage

the machine.

WARNING

indi

tes

special pro

dures

that

followed

to avoid

injury

machine oper

ator

person inspecting

re-

pairing the machine.

50/

MA50

SERVI

MANUAL

FIRST

EDITION

SEPTEMBER

1979

All

RIGHTS

RESERVED

YAMAHA

MOTOR

CO.,

lTD

JAPAN

PRINTED

JAPAN

AVERTISSEMENT

Ce manuel a etc ccrit

r la Yamaha Motor

Company a !'intension

s Conce

ionnaires

Yamaha

Aut

orises et

leurs mecanic

qualifi

es.

Ceci etant, ii a ete

ppo

quc ccr

-·

tains princip

mecani

ques

de b

ase

cer

tains

procedur

inhere

s anotre produit

son

t deja

connus et compris par le l

ecte

ur. Ce manual

d'entre

ete

ecrit pour familiari

ser

nicien avec

Jes

oce

dures courantes

demontage,

spec

tion,

remonta

ge,

d'cntretien, et

depannage concernant

Departme

cherche,

d'Engineering et

d'E

reti

chez

Yamaha

s'e

fTorccnt en permanence

rfectionner

dava

age

tous

s modcles fabriqu

par la

compagni

modifications

son

t done

ita

et l

chan

ents

signifi

s d

ans

caracteristiques ou lcs procedu

cnvoyes a tous

s Con

cessio

nnaires Yam

aha

auto

ses

et. applicables

sui

, apparaitront

dans

les

iti

onsde

manuel.

Dans

manuel, l

informations particuliere-

ment importantes

nt distin

guees

par

les

nota-

tionssuivantes:

N.B. fournit le r

enseigne

ment n

ecessaire

pour rendre

les

procedures plus faci

les

ou plus

cha

es.

TTEN

TIO

ITENTION

indique

les

procedures s

ales

qui doiv

ent

vies

pour eviter

d'endommager

machi

ne.

RTISSEM

ENT:

AVERT

ISSEM

ENT

indiquc

s procedures

iales qui doivent

re suivi

our

er un

accident al

'ut

ili

tcur de la machine OU a la

per

nnequi l'

specte OU larepare.

QTSO/MASO

MAN

L D

NTR

EMIERE

EDI

ION

MBRE 1979

DROJT

S RESERVES PAR LA

MAH

A MO

TOR

CO., L

JAP

IMPRIM

E AU J

SECTION

INDEX

DES

CHAPITRES

GENERAL

GENERALITES

~-N

~~~~~~~~~-

~_:

~~~~

POWER

TRAIN

ROULEMENT

CHASSIS

'-----

---

ELECTRICAL

EQUIPEMENT ELECTRIQUE 1

'----·

- -

APPENDIX

APPEND

ICE

·.

CHAPTER

GENERAL

INFORMATION

1-1. MACHINE IDENT

ICATI

.............1-1

1-2. SPECIALTOOLS..................................1-1

CHAPITRE 1.

INFORMATION

GENERALE

lDENT

FICATION

MACH

............................................ 1-1

1-2.

OUT

SPEC

AUX

........................... 1-1

CHAPTER

GENERAL

INF

RMATION

1-1.

HINE

IDENT

FICAT

The frame serial

number

located

the

front

side

the head pipe assembly. The

first

three

digits

iden

ify

the

model. This is

followed

das

h. The remai

ning

digits

ide

ntify

the product

ion

number

the

The engine serial

number

located

raised boss on

the

lowe

left

side

the

engine. Engine i

tification

follows

the

same

code

frame

dentification.

1 Frame. scriol number I. Num.!rn

cfc

sCric

adre

1-2.

SPECIAL

TOOLS

·-

POCKETTESTER

ToolNo

90890-03096

FLYWHEEL

LOIN

TOOL

Tool

90890-01235

TESTEUR

DE POCHE

Outil !No. 90890-03096

OUTIL

MAINTIEN

VOLANT

Outil No. 90890-

01235

1. 1

CHAPITRE

INFORMATION

GENERA

NTIFICATION

DE LA

HIN

Le numero de serie du cadre

est

situe sur le cote

avant de !'ensemble t

ube

de direction. Les trois

premiers chiffres identifient le modele.

s sont

suivis

ret. L

chiffres restants forment

le numerode productionde !'unite.

Le numero de serie du moteur

est

situe sur un

bossage

cote inferieur gauche du moteur.

identification du moteur suit le

meme

code

que J'identification du cadre.

1 Engine setial

number

Numcrodesericdumotcur

1-2. OUTILS SP

IAUX

TIMING

LIGHT

ToolNo

90890

-0

3109

ELECTRO

TESTER

Tool

90890

03021

STROBOSCOPE

Outii No.90890-03109

ECT

ROTEST

EUR

Outil No. 90890-03021

DIAL

GAUGE

Tool

90890

03110

COMPARATEUR

CADRAN

iii

No. 90890-03

110

CRANKCASE SEPARATION TOOL

Tool

90890-01135

OUTIL

SEPARATION

CARTER

Oulil No. 90890-01135

CRANK INSTALLER

Tool No.

90890

01274

POT

DEMISE

PLACE

VILEBREQUIN

Outil No. 90890-01274

ADAPTER CRANK INSTALLER BOLT

Tool No.

90890-01278

12)

ADAPTATEUR

POUR

BOULON

DEMISE

PLA

VJLEBREQUIN

Outil No. 90890-01278 (M 12)

FLYWHEEL PULLER

Tool No.

90890-01189

EXTRACTEUR

VOLANT

Outil No. 90890-0l 1

BOLT

Tool

90890-01305

BOU

LON

Outil No. 90890-0 1305

•

CRANK INSTALLER BOLT

Tool No.

90890·01275

BOULON

D.E

MISE

PLACE

VILEBREQUIN

Outil No.90890-01275

HEXAGON WRENCH

Tool

90890-01306

(25)

90890-01307

(22)

CLE

HEXAGONAL

Outil No. 90890-01306(25)

90890-01307 (22)

EXHAUST

RING

and

STEERING

NUT

WRENCH

Tool No.

90890

01268

E P

ECROU

ANNULAIRE

D"ECHAP·

PEMENT

OUR

ECROU

DIRECT

Out

90890

-0 126!!

Add

nal

and

ies

1. Thickness

gauge

set

Torque

wrench

3. Tire pressure gauge

4. Fluid measuring c

5. M

meter

Vernier

caliper

7. Cylinder gauge

Magn

c stand

9. Grease

gun

Yamalub

e 4-cycle oil

11. Yamalube

2-cycle

oil

Wheel

bearing grease

. Yamaha

bond

. 4

. Yamaha Chain and Cable Lube

Lithium

base

wheel

bearing grease

(Ex. SHELL

LETHINAX

Autrcs Ou

lsct

urnitur

ges

d'epaisseur

2. Cle dynamometrique

3. Jauge

depre

ion

pneus

4. Eprouve

Palmer

Pied

acoul

isse

Jauge de

lindre

8. Support magnetique

9. Pistolet pourgrai

ssage

. HuileYamalube 4-temps

11.

Huil

eYamalube 2-temps

Graisse pour roulements

roue

13. Endu

Yamaha

. LubrifianlYamaha pour Chaincct

bles

Graisse ab

ase

thium pour roulements

de roue(Ex.: SHE

LETHlN

1-3

CHAPTER

PERIODIC

INSPECTION

AND

ADJUSTMENTS

2-1. INTRODUCTION.................................2-1

2-2. MAINTENANCE INTERVALS

HART

S..................

....

......................... 2-1

A. Maintenance

Int

ervals................. 2-2

8. Lubrication Intervals.......

...........

2-2

2-3.

GINE.........

.....................................

2-4

A. Carbur

eto

...

....

..........

...............

.2-4

Air

ner

...

.................................. 2-5

Auto

ube

Pump............................. 2-6

D. Engine and Transmission Oil ...... 2-8

Cylinder Head ...............................2-9

2-4. CHASSIS............................................2-

A. Brake and Wheel (Front. Rear).

2-10

B. Steering and Suspension..........2-

5. ELECTRICAL......................................2-13

A. Ignition Timing............................2-13

SparkP

lug

....

...

......

...

....

............2-14

Batt

...

...................

...

..............2-15

D. Headli

ght

Beam Adjustment....

CHAPITRE 2.

INSPECTION PERIODIQUE

TREGLAG

ODUCT

....

...........................2-1

TAB

LEAUX

D'I

NTE

VAL

'EN

IEN....................................

2-1

A. Intervalles d'Entretien.................... 2-3

B. l ntervalles

Lubrification............ 2-3

2-3.

MOTEUR

.............................................. 2-4

A. Carburateur ...................

............... 2-4

B. Filtrea

Air

....................................... 2-5

C. Pompe Autol

ube

............................. 2-6

ile

Mote

Transmission................................... 2-81

Cula

sse

.......................................:

....

2-9

2-4.

PARTIE

-CYC

....

..........................2-10

einset R

oues

(Avant,

Arri

ere)

2-10

B. Direction ct Suspension.................2-11

PARTIE

ELECTR

IQU

E....................2-13

al'Alluma

...............

....

2-13

Bougie........................

...................2-

Batterie...........................................2-

D. R

age

du F

aiscea

u du Phare.....2-

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