Yamaha YFM225S 1985 User manual

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IDENTIFICATION NU MB ERS RECORD
it. KEY NUMBER:
2. VEHICLE NUMBER:
3. ENGINE NUMBER:
· .._I __
Your key iclentificati_on number is stamped
on your key ~ as shown in the j;.> llowin .g
illustration . Record this number in the sp -- e-
provided fo r reference if you need a new key.
Record your vel;licle and engine numbers in
the space s provided to assist you in ordering
spare pa rt s from your Yamaha dealer or for
reference in case your vehicle is stolen. (See
page 4i

YFM225S
OWNER'S MANUAL
© 1985 by Yamaha Motor Corporation, U.S.A.
1st ~#J.tion, January 1985
All rights r~served. Any reprinting or
unauthorized use without the written
pern:iission of Yamaha Motor Corporation,
U.S.~. is expressly prohibited.
Printed in Japan
_P/N_ LIT -1162§.-04-83

INTRODUCTION
Congratulations on your purchase of the Yamaha YFM225S. This model
represents the product of many years of Yamaha experience in the produc-
tion of fine sporting, touring, and pace setting racing machines. You can now
appreciate the high degree of craftsmanship and reliability that have made
Yamaha a leader in these fields.
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY
BEFORE OPERATING YOUR NEW MACHINE.
PAY CLOSE ATTENTION TO THE CAUTION AND WARNING LABELS
ON THE MACHINE.
This manual will provide you with a good basic understanding ofthe features,
operation, and basic maintenance and inspection items of this machine. A
section is provided which will describe the special techniques and skills
necessary to ride your machine. If you have any questions regarding the
operation or maintenance of your machine, P.) . ease consult a Yamaha dealer.
NOTE:
Some date in this manual may become out-dated due to improvements made
to this model in the future. If there is any question concerning this manual,
consult your nearby Yamaha dealer. TECHNICAL PUBLICATIONS
SERVICE DIVISION
MOTORCYCLE OPERATIONS
YAMAHA MOTOR CO., LTD.
'' "-llllliiifllllii:l~51iii~L:6 ~~ ~~;_:_~ • ...:=..;;..'=-....:..i:.:::::!::.....:;:::::::::::.:_~----- -- --- -= ~ __;,:,...:=----=-

· ·'
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Particularly important information is distinguished in this manual by the
. following notations:
NOTE: A NOTE provides key information to make procedures easier
or clearer.
WARNING :
A CAUTION indicates special procedures that must be
followed to avoid damage to the machine.
A WARNING indicates special procedures that must be
followed to avoid injury to a machine operator or person in-
specting or repairing the machine.
IMPORTANT NOTICE
This machine is designed and manufactured for OFF-road use only. It is il-
legal fo operate this machine ~ n any public street, road or highway. Such
use is prohibited by law.
This machine complies with all applicable OFF-highway noise level and
spark arrester laws and regulations.
Please check your local riding laws and regulations before operating this
machine.

.
. " CONTENTS
LOCATION OF THE "CAUTION
AND SPECIFICATION LABELS" . ....... 1
DESCRIPTION AND
MACHINE IDENTIFICATION ... . . . ..... 3
SAFETY INFORMATION . . ... . ........ 5
LOADING PRECAUTIONS ............ 1Q
SAFETY WARNINGS. . . . ... . ....... . . 12
CONTROL FUNCTIONS .............. 13
PRE-OPERATION CHECKS. .......... 26
OPERATION ...................... 31
RIDING YOUR MOT0 -4 ............. 40
PERIODIC MAINTENANCE
AND ADJUSTMENT ................ 56
CLEANING AND STORAGE .... . .... . 89
SPECIFICATIONS ................. . 92
WARRANTY INFORMATION .. . ...... 97
NOISE REGULATION ............ . .. 98
MAINTENANCE RECORD ........... 99
WIRING DIAGRAM . . ... .. ....... . .. 100

LOCATION OF THE "CAUTION AND
SPECIFICATION
LABELS"
CAUTION
AUXILIARY D.C T
ERMINAL
MAXIMUM OUT PUT: 12V 10A
Reid Owner's Manuel
carefully
before
c onn ecting en accftsory.
ATTENTION
PRI SE AUX I LI AI RE
DE c. c.
PUISSANCE
MAXIMA LE :
12V
10A
Avent de connecter un appareil,
lire le Manuel du proprietaire
atten tl ve ment.
-1-

®
IWOftT ANT IN,OLllMATION
YFM:nl
Tlre SiH : Front•••• . FIMt ••••
A1f1r1nc1T lr 11"r .. 111r1 : Front•• kg /c m1 l""l»il
A•r ""k9/cm
1
(""ps i)
~
bcff1lw tin pr...,rt - •• k9/cm
1 (
•• pell
m1y caa~ 1lr1 10 burft . 9• ""' to "'°id q.ilck
IMl1tlon whlchrn.eye11UM0¥91-9f...,rl ,
Too low pr...,,, below •• kg/cml 1•• Pi ii-Front
00
kl/cm
1f
.. p1 i)· R-
wlllC1UMtlretodhlloctlelromrlm ,
~
1. 1'11Mdown.,..1m.,..u1lcw1fl.t1tybtfor1op1r11l nt .
2. OFF-AOAO uM only.
3. Chtckfu9'1nd0Ubefor9op1r 1 tlns.
4. llfof1 n.,tlnt qlne : CMctt tnrottlt ooer•
tlon1nd pl1Cttt1n..,..IM1onlnneutr1I.
II. E"9 1M c:en be mnld In NEUTRAL po1ltlon
only .
9, W•r htl~ Ind ai ltlbl t proUC:tlW dothlnt.
7. o,..tofonly . Nope_,..,, ,
I . Adiuft .,p-ltlon requ l nd wh111 children
~11h l 1\'9tllc l 1 ,
9. Setbrltk1btfor1twv ln 9vehlcl1.
LOADING IN,ORMATION
WMn lo.ding mtcl'llnt with cugo ind / or towlnt 1
tr1ll1r , m.chlnt mun b1 uud on 19'191 tnd llM
,.,,.In only ind mull not ucMd •• kt/h I ..
mll•ltll . '
MAXIMUM LOADING LIMIT
e Vefllcl1IOldllmlt : ••119(""lbll
Total-i911tOIC1rlilO ,l r. ll lfhildl ....MIClltOld,
rldlf,endlCCftlOl'ln .
W""'1 utlnt th lt mlldlintundlf ••km /ht••
mil/hi , th1t lold llm~ cen IMI 1ncr-...id 10
••1191 •·1bl),
• l'rontclfr ilf: •• k9f ' " l bl)
• l'IMrcerr ! lf ; ••119t•• 1 bl)
• St1t-ae bo~ ; •• 119 f .. l btl
e Tr1H1thltdl : .
. Htrlunulloed : ••111 t "' lbl)
Tot1l-lehtol1r1Uer1ndUr110 .
VeMIUllold : ••1t9 (' 01 bs )
V1tt l c.1 l -lghton1r1i l lfh i tchloin1 .
Ol'llVE SELECT LEVER
1, l'llldow n1r·1m1nu1lcar1lullylMllOrlOPlf1tln9.
2. B1for1 movlne thl dr l VI Miia 1 ..,., . m1k1 """
th• m1Ch !n1 II II I full llOp tnd thll th•
perk l nebr1kt l1 1PP ll lCI .
3. l'orrt¥1rM , dr lv 111!tcl l 1.,.rce n lMlutldonly
lnhtge1r .
YAMAHA MOTOR CO.. LTD,
'4" ~----------------~
\.!.) AMBIENT TEMP ./ STARTER LEVER POSITION
®
®
@
o•
10 ° 20° 30° •c
30•
so•
70°
90•
.. STRAGE
BOX
MAXIMUM LOAD LIMIT: ••KG ( •• lbs)
<D
~
® @
~
Thr protects storage box from damage, do not put metal
products (e. g. tools) or sharply edged products directly
in the storage box . If they must be stored, wrap them
in appropriate cushion material.
EACH LEVER POSITION INDICATS
COLO ENGINE STARTING RANGE .
ALSO 2 : WARM UP POSITION ON ENGINE
STARTED AT 1 I 2 .
3 : WARM ENGINE START PO SITION.
NOTE: see OWNER'S MANUAL
ATIENTION
BOITE DE RANGEMENT
CHARGE MAXIMUM : ••KG( .. lbs)
Pour Cvitcr dcndommager la boitc de rangemcnt nc
pas pla cer d es objects mCtalligucs (commc des outils)
ou d es objects avant des aritcs vivcs directcment dans
ccttc boite. Prendre soin de bien !cs emballcr au prCa.lablc.
USE HYPOID GEAR OIL
SAE #so
MFD . BY YAMAHA MOTOR CO ., LTD .
VEHICL E ID NO.
xxxx 117di9ittl
YAMAHA MOTOR CO., LTD.
TYPE CLASSIFIC AT ION -A LL TERRAIN VEHICLE
THIS VEHICLE IS INTENDED EXCLUSIVELY FOR
EMERGENCY STARTER
In c111 of tlK!ric 11111 ln1 l1 ll ur1, 1n9 in1 c.en IMI n1rttd
by1mtr91ncyropectrri•d l nrter ltgg191 be,. ,
1. Shlft1r1n1mlu l on!nlontu lrll .
2. R-.novt1 Chlnvt pedel •nd open ltf t crtnki:11t co...,.,
3. Turn l9ni1ion ktyto "ON...
4. lnHM knon9d ind of rope I nto noK:h in ou ll •v1nd
wind rope th rM Or four turnt counhrclockwl11.
Pull dlcomprtttlon I ._. vp . Then 9i ¥9 rope t
h•llhyoulttOltlft . R•Pttt i fnKllllfy.
15 . Whtn tngint has ttll"lld , r ep l .:e ind "°"" crenk·
c_co....,•ndchlntePtdtlbefor•09«1t in9.
WARNING :
a.c...11 lef1 crric- -
m..st M ..-nMI for ihls ~
d~ . M1111refull1 0 .. oldoonttc:t
with rot.tint 1t11ll.Y •you c-ld
bt lnj.....- . Aftef 1nt1n1 ttll'll,
-llf11My nil'llt11U • ..._
-2-
OFF ROAD USE .
LANCEUR DE SECOURS
Quand le di!IllJftur filoectriqut tst en pe.nne, ii motieur
pn t ftre dim1rd ii !'al.de de II oorde de 1ecoun. Cette
corde est sin1'9 d1111 II bo f te ii blpp1 arrWre.
I. Menn II bofte de riteue l an point mort.
2. Enle•erllpfidaledeUlectew:pllil1nlcwrlecoUHrcle
decarterpcile.
3. Mettrelacl,d1cont1ct1111llpo1ition"ON" .
4. lnMnr l'extrimit6 node de II corde dln 1 l"eneo-
che de la po111iepllileNo\llerlaoordedetrobo11
quatn toun "'" II •11ehl .
Tlrer le levier de dicompnufon ven le h111t . Tuer la
eotde rij:oun1111n.nt po111 dimarHr le mou.111 .
RJP'ter ome ~•lion .t n'mualn .
.S. Une foi.1 que le mote111 tournt, remonter le couwrcle
de evii:r et II J>'dlle de 1ilecte 111;\e •6hic\lle pe11 t
en111iteftre11tWs6.
AVERTISSEMENT:
Q111nd le co11¥Wcl9 d1carter111 enkvf , f1in 1ttention ii
n1 paa touchu 11 pouli• t n JOtltlon; on powrUt 11
-··
MADE IN JAPAN .

DESCRIPTION AND MACHINE IDENTIFICATION
@ @
16
1. Rear
carrier
10. Rear wheel
2. Seat 11. Change pedal
3.
Main switch 12 . Rear
brake lever
4.
Auxiliary DC terminal 13 . Parking
brake button
5.
Front carrier
14 . Speedometer
6.
Brake pedal 15.
Starter lever (CHOKE)
7.
Headlight
16 .
Front brake lever
8 .
Front wheel 17.
Throttle lever
9. Fuel
cock
18 .
Handlebar switch
-3-

Vehicle identification number
The vehicle identification number is stamped
into the left side of the frame.
1. Vehicle identif icati on number
NOTE:
The vehicle identification number is used to
identify your machine.
..
-4 -
Engine serial number
The engine serial number is stamped into the
elevated part of the right rear section of the
engine.
1. Eng i ne se rial number
NOTE:
The first three digits of these numbers are for
model identification; the remaining digits are
the unit production number. Keep a record of
these numbers for reference when ordering
parts from a Yamaha dealer.

SAFETY INFORMATION
When you ride your machine, you must know
and use the following for your safety:
Ride with care and good judgement:
1. Riding your machine requires skills ac-
quired through practice over a period of
time. Take the time to learn the basic
techniques well before attempting more
difficult maneuvers.
-5-
2. This machine is designed to carry one
person only. Do not carry a passenger .
ONE PERSON
ONLY

3: Always perform the Pre-Operation
Checks listed on page 26 before riding for
safety and proper care of the mcahine.
-6-
4. The exhaust system on the machine is
very hot during and following operation.
To prevent burns, avoid touching the ex-
haust system. Park the machine in aplace
where pedestrians or children are not
likely to touch it.

5. Always keep your feet on the footrests
during operation. Otherwise your feet
may contact the rear wheels.
6. Avoid wheelies and jumping . You may
lose control of the machine or overturn.
7. Use extra caution when riding the
machine with additional loads, such as
accessories, cargo, or a trailer. The
machine's handling may be adversaly af-
fected. Reduce your speed when adding
additional loads.
-7-
---~- - --- ---:-----~-
8. When transporting the machine in
another vehicle, be sure it is kept upright
and that the fuel cock is turned to the
"OFF" position. If the machine should
lean over, gasoline may leak out of the
carburetor or fuel tank.

Wear protective clothing:
1. ALWAYS wear a helmet when riding
your machine. Goggles or other eye
protection should also be worn.
2. Wear boots, gloves, long pants and other
protective clothing.
-8-
Be careful where you ride:
1. This machine is designed for off-road use
only. Riding on pavement is not recom-
mended since handling can be seriously
affected. If you must ride on paved sur-
faces, go slowly and do not make sudden
turns or stops. Riding on pavement will
also shorten tire life.
2. Ride cautiously in unfamiliar areas. You
may encounter hidden obstacles which
could cause an accident.

3. Do not ride in areas posted "no trespass-
ing." Do not ride on private property
without getting permission.
4. When riding in an area where you might
not easily be seen, such as desert terrain,
mount a caution flag on the machine.
DO NOT use the flag pole bracket as a
trailer hitch.
-9-
Modifications:
1. This machine is designed to conform with
laws and regulations rega"rding sprk ar-
resters and noise.level. Do not modify the
exhaust system.
2. Modifications to this machine may
reduce safety and reliability, and may
make the machine illegal for use.

LOADING PRECAUTIONS
Proper loading of your machine is important
for the handling, braking, and safety chara-
cteristics of the machine. Please read the
following . 'information before loading and
operating your machine.
• The total weight of the rider, accessories,
and cargo must not exceed the maximum
load limit.
• When loading the machine with cargo
and/or towing a trailer, the stability, per-
formance and safe operating speed will
be reduceq. Accordingly, the machine
must be used on level and flat terrain only
and must nRt exce~ 16 km/h (10 mi/h).
• Do not ·carry sue~ a .big cargo on the front
carrier as to obstruct the view ahead.
• Make sure that the cargos are securely at-
tached to each carrier.
• Make sure that the cargo on the rear car-
rier is placed as far forward as possible.
-10 -
• The cargos on the carriers must not ex-
tend beyond the carrier end.
• Make sure that the cargo in the trailer is
placed so that it will not cause the front
wheels of the machine to lift off the ground
during operation.

MAXIMUM LOADING LIMIT
• Vehicle load limits: 110 kg (240 lb)*
Total weight of cargo, trailer hitch
vertical load, rider, and accessories.
• When using this machine under 16 km/h
(10 mi/h), this load limit can be in-
creased to 150 kg (330 Ib).
• Front carrier: 15 kg (33 lb)
• Rear carrier: 45 kg (100 lb)
• Storage box: 2 kg (4.4 lb)
• Trailer hitch:
Horizontal load: 300 kg (660 lb)
Total weight of trailer and cargo.
Vertical load: 15 kg (33 lb)
Vertical weight on trailer hitch joint.
Be extra careful of the machine balance
and stability when towing a trailer. J
-11 -

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SAFETY WARNING
1. GASOLINE IS HIGHLY FLAMMABLE:
• Always turn off the engine when
refueling.
• Take care not to spill gasoline on
the engine or exhaust piep/muffler
when refueling.
• Never refuel while smoking or in the
vicinity of an open flame.
2. If you should swallow some gasoline or
!nhale a lot of gasoline vapor, or allow
some gasoline to get into your eye(s), see
your doctor immediately.
If any gasoline spills on your skin or
clothing, immediately wash it with soap
and water, and chaflge your clothes.
-12-
3. Never start the engine or let it run for any
length of time in a closed area. The ex-
haust fumes are poisonous and may
cause loss of consciousness and death
within a short time. Always operate your
machine in an area with adequate
ventilation.
--· ~ ~ ~- - --~- -~-

CONTROL FUNCTIONS
Main switch
Functions of the respective switch positions
are as follows:
ON:
Engine can be started only at this position
and headlight and taillight come on when
handlebar switch is on.
OFF:
All electrical circuits are switched off. The
key can be removed in this position.
Indicator lights
"NEUTRAL" indicator light (Green):
This indicator lights when the transmission is
in neutral.
"REVERSE" indicator light (Red):
This indicator lights when the transmission is
in reverse.
1. "NEUTRAL" indicat or light
2. "RE VERSE" indicat or light
Speedometer
The trip odometer is built into the speedo-
meter. The trip odometer can be reset to "0"
with the reset knob.
-13-