Yamaha QT 50F Manuel utilisateur

NOTICE

ThismanualhasbeenwrittenbyYamahaMotorCompanyforuseby

AuthorizedYamahaDealersandtheirqualifiedmechanics.Inlightofthis

purposeithasbeenassumedthatcertainbasicmechanicalpreceptsand

proceduresinherenttoourproductarealreadyknownandunderstoodby

thereader.Thisservicemanualhasbeenwrittentoacquaintthemechanic

withcommondisassembly,inspection,reassembly,maintenance,and

troubleshootingproceduresassociatedwiththismachine.

TheResearch,Engineering,andServiceDepartmentofYamahaare

con-

tinuallystrivingtofurtherimproveallmodelsmanufacturedbythecom-

pany.Modificationsarethereforeinevitableandsignificantchangesin

specificationsorprocedureswillbeforwardedtoallAuthorizedYamaha

Dealersand

will,

whereapplicable,appearinfutureeditionsofthismanual.

Particularlyimportantinformationis

distinguished

inthismanualbythe

followingnotations:

NOTE:

A NOTEprovideskeyinformationtomakeprocedures

easierorclearer.

CAUTION:

A CAUTIONindicatesspecialproceduresthatmustbe

followedtoavoiddamagetothemotorcycle.

WARNING:A WARNINGindicatesspecialproceduresthatmustbe

followedtoavoidinjurytoa motorcycleoperatororper-

soninspectingorrepairingthemotorcycle.

QT50F

SERVICEMANUAL

1stEdition-March1979

2ndPrinting,November

1980

OCL

3rdPrinting,July

1981

OCL

ALLRIGHTSRESERVEDBY

YAMAHAMOTORCORPORATION,

U.S.A.

PRINTEDIN

U.S.A.

LIT-11616-01-31

SECTIONINDEX

GENERALINFORMATION

PERIODICINSPECTIONAND

ADJUSTMENTS

ENGINEOVERHAUL

CARBURETlON

CHASSIS

ELECTRICAL

'vVys

APPENDICES

•-

«*i

«ajL_.„

. ,.

-'iH

i' '•

CHAPTER

1.GENERALINFORMATION

1-1.

MACHINEIDENTIFICATION1-2

1-2.SPECIALTOOLS1-2

<•)•

CHAPTER1.GENERALINFORMATION

1-1.

MACHINEIDENTIFICATION

The

fr&me

serialnumberislocatedonthe

frontslideoftheheadpipeassembly.The

firstthreedigitsidentifythemodel.Thisis

followedbya dash.Theremainingdigits

identify:theproductionnumberoftheunit.

POCKET

TESTER'

ToolNo.90890-03096

FLYWHEELHOLDINGTOOL

Tool

No.90890-01235

Theengineserialnumberislocatedona

raisedbossonthelowerleftsideofthe

engine.Engineidentificationfollowsthe

samecodeasframeidentification.

Engineserialnumber

•J%

I®.

-a

.sB

wmmB^LM

ELECTROTESTER

Tool

No.90890-03021

DIALGAUGE

ToolNo.

90890-03110

FLYWHEELPULLER

ToolNo.

90890-01189

1-2

CRANKICASE

SEPARATIONTOOL

Tool,No.

90890-01135

CRANK

Tool

Nci

INSTALLERPOT

90890-01274

ADAPTER

CRANKINSTALLERBOLT

Tool

No!,

90890-01278(M12)

EXHAU

RINGandSTEERINGNUTWRENCH

Tool

No.

90890-01268

Additional

ToolsandSupplies

Thicknessgauge

set

Torque

wrench

3.Tirepressuregauge

Fluidmeasuringcup

5.Micrometer

6.Verniercaliper

7.Cylindergauge

8.Magneticstand

10.

11.

12.

13.

14.

15.

BOLT

ToolNo.90890-01305

CRANKINSTALLERBOLT

ToolNo.90890-01275

HEXAGONWRENCH

Toll

No.

90890-01306

(25)

90890-01307(22)

Greasegun

Yamalube

4-cycle

oil

Yamalube

2-cycle

oil

Wheelbearinggrease

YamahabondNo.4

YamahaChainandCableLube

Lithiumbasewheelbearinggrease

(Ex.

SHELL

LETHINAXA)

1-3

CHAPTER2.

PERIODICINSPECTIONAND

ADJUSTMENTS

2-1.

2-2.

2-3.

2-4.

2-5.

INTRODUCTION2-2

MAINTENANCEINTERVALSCHARTS2-2

A.MaintenanceIntervals2-2

B.LubricationIntervals2-3

ENGINE2-3

A.Carburetor2-3

B.AirCleaner2-4

C.AutolubePump2-4

D.EngineandTransmissionOil2-5

E.CylinderHead2-6

CHASSIS2-6

Brake

andWheel(FrontRear)2-6

B.SteeringandSuspension2-7

ELECTRICAL2-8

A.IgnitionTiming2-8

B.SparkPlug2-8

C.Battery2-9

D.HeadlightBeamAdjustment

2-10

CHAPTER2.

PERIODICINSPECTIONANDADJUSTMENTS

2-1.

INTRODUCTION

Thischapterincludesallinformationnecessarytoperformrecommended

inspectionandadjustment.Thesepreventivemaintenanceprocedures,if

followed,

willinsuremorereliablevehicleoperationanda longerservice

life.

Theneedforcostlyoverhaulworkwillbegreatlyreduced.Thisinfor-

mationappliesnotonlytovehiclesalreadyinservice,butalsotonew

vehiclesthatarebeingpreparedforsale.Anyservicetechnicianperform-

ingpreparationworkshouldbefamiliarwiththisentirechapter.

2-2.

MAINTENANCEINTERVALSCHARTS

Thefollowingchartsshouldbeconsideredstrictlyasa guidetogeneral

maintenanceandlubricationintervals.Youmusttakeintoconsideration

thatweather,terrain,geographicallocation,anda varietyofindividual

uses.

Thistimescheduleshouldbealteredtomatchindividualowners'

requirements.Forexample,ifthemotorcycleiscontinuallyoperatedinan

areaofhighhumidity,thenallpartsmustbelubricatedmuchmore

fre-

quentlythatshownonthecharttoavoiddamagecausedbywatertometal

parts.

A.Mainter

cioj

Cylinderhead

Sparkplug

Airfilter

Carburetor

Autolubepurr

*Brakesystem

*Wheelsandt

*Suspensions

Fuelpetcock

•Battery

*Lights/Signal

ance

Intervals

tern

/Exhaustsystem

(complete)

res

stem

Fittings/Fastehers

Remarks

Decarbonize

Inspect/Cleaningorreplaceasrequired

Wet

type-Must

bewashedanddampedwith

Yamalube

2-cycle

OilorSAE20motoroil

Checkoperation/Fittings

Clean/Refit/Adjust

Check/Adjust/Airbleeding

Check/Adjustas

required-Repair

asrequired

Checkpressure/Wear/Balance/Runout

Check

operation/Repair

asrequired

Clean/Flushtankasrequired

Top-up/Checkspecificgravityandbreather

pipe

Checkoperation/Replaceasrequired

Tightenbeforeeachtrip

and/or...

•

Initial

month

months

Unit:

(mi)

Thereafterevery

months

year

*Indicatespre-operation

checkitems.

2-2

B.LubricationIntervals

Unit:km(mi)

Item

•Transmissionoil

*Conrolandmete

cables

Throttlegrip

an<j

housing

Brakelever,

Brakecamshaft

Steeringbearing

Speedometer

housing

Wheelbearings

Middleandfinal

gear

*Indicatespre-opera

tionchec

Remarks

Replace/Warmengine

beforedraining

Applythoroughly

Applylightly

Inspectthoroughly/Pack

moderately

Inspectthoroughly/Pack

moderately

Donotover-pack

yearlyor...

Seepage5-7torepack

grease

kitems.

Type

Yamalube

4-cycle

OilorSAE

10W/30

type"SE"motoroil

SAE10W/30

motoroil

Lithiumbasegrease

Medium-weightwheelbearing

grease

Lithiumbasegrease

Medium-weightwheelbearing

grease

Lithiumbasewheelbearinggrease

(EX.

SHELLLETHINAXA)

Initial

month

months

Check

months

Check

Thereafterevery

months

year

years

2-3.

ENGIN

Carburetcir

Pilotairscrew

Turnairadjustingscrewuntilitlightly

seats,

thenbackitouttospecification.

This

adjustment

canbemadewith

enginestopped.

Airscrew(Turnsout):1-3/4[1-1/2]

[]:AfterengineserialNo.

3L5-702401

Startthe

bngine

andletitwarmup.

3.Throttle

stop

screw

Turnthrottlestopscrewinoroutto

Pilotairscrew

Throttlestopscrew

achieve

specified

Idlingspeed

mooth

engineoperation

die

speed. at

1,700

r/min

Throttlecable

a.Throttlecable2.

Loosencableadjusterlocknut(attop

ofcarburetor)andturncableadjuster

untilspecifiedfreeplayisobtained.

Retightenlocknut.

NOTE:

Thepilotair

knd

throttlestopscrewsare

separateadjustmentsbuttheymustbe

adjustedatthesametimetoachieve

opti-

mum

operating

conditionatengineidle

speeds.

Freeplay:

1.0

mm(0.04in)

Adjuster2.

Lock

nut

2-3

;

III

;

*••'•'-

'•';

ft?

•_•:'

b.Throttle

cable2

directioh

cable1

After

engine

idlespeedandthrottle

aresetcheckplayintuning

ofthrottlegrip.Theplay

should

tie

3 mm(0.08

0.12in)

atgripflange.Loosenthelocknutand

turnthewireadjustertomakethe

necessaryadjustment.Afteradjusting,

besure

tightenthelocknutproperly.

Adjuster

B.AirClean

Remove

element

theaircleanercasecapand

assembly.

Wash

the

elementgently,butthorough-

ly,in

solvent.

Squeezeexcesssolventoutofelement

anddry.

Poura

small

quantityof20W.motoroil

onto

cleelner

elementandworkthor-

oughlyintotheporousfoammaterial.

Element

ihust

bedampwithoilbutnot

dripping.

5.Re-installtheelementassembly,case

coverandseat.

NOTE:

Eachtimecleanerelementmaintenanceis

performed,

checktheairinlettothecleaner

caseofobstructions.Checktheaircleaner

jointrubbertothecarburetorandmanifold

fittingsforanair-tight

seal.

Tightenallfit-

tingsthroughlytoavoidthepossibilityofun-

filteredairenteringtheengine.

r-CAUTION:

Neveroperatetheenginewiththeair

cleanerelementremoved.

Thiswillallow

unfiltered

airtoenter,

causingrapidwearandpossibleengine

damage.Additionally,operationwith-

outthecleanerelementwillaffectcar-

buretorjettingwithsubsequentpoor

performanceandpossibleengineover-

heating.

C.AutolubePump

Airbleeding

Tobleedtheoilpump,firstremovethe

bleedscrew.Startengineandrunat

idlingspeed.Thenpulltheoilpump

wireasmuchaspossible,andcontinue

toruntheengineuntilallairbubbles

disappearfromtheoilflowingoutfrom

thebleederhole.

Reinstallbleedscrew.

'.'''

zs\

\S4:S> J

'-"*-.

'r'i

',;-!

1J";i

i',

>•

: .-

lift

[

is'S

ifl

2-4

Table des matières

Autres manuels Yamaha Moto

Yamaha

Yamaha X MAX CZD300-A Manuel utilisateur

Yamaha

Yamaha SR400 Manuel utilisateur

Yamaha

Yamaha XJ6N Manuel utilisateur

Yamaha

Yamaha 5PW1-SE2 Manuel utilisateur

Yamaha

Yamaha YZF-R1 Manuel utilisateur

Yamaha

Yamaha GYTR YZF-R6 2022 Manuel

Yamaha

Yamaha 2011 V Star XVS650AA Manuel utilisateur

Yamaha

Yamaha VIRAGO XV250V Manuel utilisateur

Yamaha

Yamaha XT660RW 2007 Manuel

Yamaha

Yamaha FZS1000P Manuel utilisateur

Yamaha

Yamaha FZ-07 2015 Manuel utilisateur

Yamaha

Yamaha 2010 V Star XVS650AZ Manuel utilisateur

Yamaha

Yamaha YZF-R25 Manuel utilisateur

Yamaha

Yamaha Virago XV535 Manuel utilisateur

Yamaha

Yamaha TMAX XP530E-A 2017 Manuel utilisateur

Yamaha

Yamaha TT-R90(T) Guide d'application

Yamaha

Yamaha YZ125(R)/LC Guide d'application

Yamaha

Yamaha FJR13AEV(C) Manuel utilisateur

Yamaha

Yamaha MAJESTY YP250 Manuel utilisateur

Yamaha

Yamaha XT250Z Manuel utilisateur

Yamaha

Yamaha WR125R 2009 Manuel utilisateur

Yamaha

Yamaha FZ8 Manuel utilisateur

Yamaha

Yamaha YZF R1 2020 Manuel utilisateur

Yamaha

Yamaha V-Star XVS1100AWR Manuel utilisateur

Manuels Moto populaires d'autres marques

OHVALE

OHVALE GP-0 Manuel de la liste des pièces

KTM

KTM 350 XCF-W USA Manuel utilisateur

HYOSUNG

HYOSUNG ST7 Manuel utilisateur

Husqvarna

Husqvarna FC 250 2016 Manuel utilisateur

Ducati

Ducati SCRAMBLER 800 Manuel d'instructions

MOTO GUZZI

MOTO GUZZI QUOTA 1100 ES Manuel utilisateur

APRILIA

APRILIA ETV MILLE CAPONORD - PART1 02-2001 Manuel utilisateur

KTM

KTM Freeride E-XC 2021 Manuel utilisateur

Fantic

Fantic Enduro 125 Manuel utilisateur

Ducati

Ducati Supersport 750 desmodue Manuel utilisateur

MV Agusta

MV Agusta 2008 F4 312RR 1078 Manuel d'instructions

Ducati

Ducati 748 monoposto strada Manuel utilisateur

ATK

ATK 1988 250 Manuel utilisateur

Excelsior-HENDERSON

Excelsior-HENDERSON 1999 HCX Manuel utilisateur

Triumph

Triumph Thunderbird Manuel utilisateur

Ducati

Ducati 996 Manuel utilisateur

BMW

BMW MOTORRAD K 1200 R Sport Manuel d'installation et d'entretien

BMW Motorrad

BMW Motorrad G 650 GS 2007 Manuel d'installation et d'entretien