2005 YAMAHA WR 250F battery

3 - 113
INSP
ADJ
1. Remove:
Seat
2. Disconnect:
Battery leads
(from the battery terminals)
CAUTION:
First, disconnect the negative bat-
tery lead 1, and then the positive
battery lead 2.
3. Remove:
Battery band
Battery
4. Measure:
Battery charge
ÈRelationship between the open-circuit
voltage and the charging time at 20 °C
(68 °F) (These values vary with the
temperature, the condition of the
battery plates, and the electrolyte
level.)
ÉOpen-circuit voltage
ÊCharging time (hours)
ËTime (minutes)
ÌCharging condition of the battery
ÍAmbient temperature 20 °C (68 °F)
aCharging
bCheck the open-circuit voltage
Measurement steps:
Connect a pocket tester
1 to
the battery terminals.
Tester positive probe →
battery positive terminal
Tester negative probe →
battery negative terminal
NOTE:The charge state of an MF bat-
tery can be checked by measur-
ing its open-circuit voltage (i.e.,
the voltage when the positive
terminal is disconnected).
No charging is necessary when
the open-circuit voltage equals
or exceeds 12.8 V.
Check the charge of the battery,
as shown in the charts and the
following example.
Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20 ~ 30%
È
1. Déposer:
Selle
2. Déconnecter:
Câbles de la batterie
(des bornes de la batterie)
ATTENTION:
Déconnecter d’abord le câble négatif
de batterie 1, puis le câble positif 2.
3. Déposer:
Sangle de la batterie
Batterie
4. Mesurer:
Charge de la batterie
È
Relation entre la tension en circuit ouvert
et le temps de charge à 20 °C (68 °F)
(Ces valeurs varient en fonction de la
température, de l’état des plaques de la
batterie et du niveau d’électrolyte.)
É
Tension en circuit ouvert
Ê
Durée de charge (heures)
Ë
Durée (minutes)
Ì
Etat de charge de la batterie
Í
Température ambiante 20 °C (68 °F)
a
Charge
b
Vérifier la tension en circuit ouvert
Etapes de la mesure:
Raccorder un multimètre 1 aux
bornes de la batterie.
Sonde positive du multimètre →
borne positive de la batterie
Sonde négative de la batterie →
borne négative de la batterie
N.B.:
On peut contrôler l’état de charge
d’une batterie sans entretien (MF)
en mesurant la tension entre ses
bornes en circuit ouvert (après
avoir déconnecté la borne posi-
tive).
Inutile de recharger tant que la ten-
sion en circuit ouvert est supé-
rieure ou égale à 12,8 V.
Contrôler la charge de la batterie,
conformément aux diagrammes et
à l’exemple suivant.
Exemple
Tension en circuit ouvert = 12,0 V
Temps de charge = 6,5 heures
Charge de la batterie = 20 à 30 %
ELECTRICAL
PARTIE ELECTRIQUE

3 - 115
INSP
ADJ
5. Charge:
Battery
(refer to the appropriate charg-
ing method illustration)
WARNING
Do not quick charge a battery.
CAUTION:
Never remove the MF battery
sealing caps.
Do not use a high-rate battery
charger since it forces a high-
amperage current into the bat-
tery quickly and can cause bat-
tery overheating and battery
plate damage.
If it is impossible to regulate the
charging current on the battery
charger, be careful not to over-
charge the battery.
When charging a battery, be
sure to remove it from the
machine. (If charging has to be
done with the battery mounted
on the machine, disconnect the
negative battery lead from the
battery terminal.)
To reduce the chance of sparks,
do not plug in the battery
charger until the battery charger
leads are connected to the bat-
tery.
Before removing the battery
charger lead clips from the bat-
tery terminals, be sure to turn
off the battery charger.
Make sure the battery charger
lead clips are in full contact with
the battery terminal and that
they are not shorted. A corroded
battery charger lead clip may
generate heat in the contact
area and a weak clip spring may
cause sparks.
If the battery becomes hot to the
touch at any time during the
charging process, disconnect
the battery charger and let the
battery cool before reconnect-
ing it. Hot batteries can explode!
As shown in the following illus-
tration, the open-circuit voltage
of an MF battery stabilizes about
30 minutes after charging has
been completed. Therefore, wait
30 minutes after charging is
completed before measuring the
open-circuit voltage. 5. Charger:
batterie
(se reporter à l’illustration de la
méthode de charge appropriée)
AVERTISSEMENT
Ne pas utiliser la méthode de charge
rapide pour recharger cette batterie.
ATTENTION:
Ne jamais ôter les bouchons d’une
batterie sans entretien (MF).
Ne pas utiliser un chargeur de bat-
terie à intensité élevée. En effet, un
ampérage trop élevé risque de pro-
voquer la surchauffe de la batterie
et l’endommagement des plaques de
la batterie.
S’il n’est pas possible de régler le
courant de charge de la batterie,
bien veiller à ne pas surcharger la
batterie.
Toujours déposer la batterie avant
de procéder à sa charge. (Si la batte-
rie doit être chargée sur la moto,
déconnecter le câble négatif de la
borne de la batterie.)
Afin de réduire le risque de produc-
tion d’étincelles, ne pas brancher le
chargeur de batterie avant d’avoir
connecté les câbles du chargeur à la
batterie.
Ne pas oublier de couper l’alimenta-
tion du chargeur avant de retirer les
pinces du chargeur des bornes de la
batterie.
Veiller à assurer un contact électri-
que parfait entre les pinces du char-
geur et les bornes de la batterie. Ne
jamais laisser les pinces entrer en
contact l’une avec l’autre. Une pince
de chargeur corrodée risque de pro-
voquer un échauffement de la batte-
rie sur la zone de contact et des
pinces lâches peuvent provoquer
des étincelles.
Si la batterie devient chaude au tou-
cher pendant la charge, débrancher
le chargeur de batterie et laisser
refroidir la batterie avant de la
rebrancher. Une batterie chaude
risque d’exploser !
Comme montré dans le schéma sui-
vant, la tension en circuit ouvert
d’une batterie MF se stabilise envi-
ron 30 minutes après la fin du char-
gement. Par conséquent, attendre
30 minutes avant de mesurer la ten-
sion en circuit ouvert.
ELECTRICAL
PARTIE ELECTRIQUE

3 - 117
INSP
ADJ
ELECTRICAL
Charging method using a variable voltage charger
Connect a charger and
ammeter to the battery
and start charging.
Is the amperage higher
than the standard charg-
ing amperage written on
the battery?NO YES Charger
Ammeter
Adjust the voltage to obtain
the standard charging amper-
age.
Set the timer to the charging
time determined by the open-
circuit voltage.
Refer to “BATTERY
INSPECTION AND CHARG-
ING” section.Adjust the charging voltage to
20 ~ 25 V.
Monitor the amperage for
3 ~ 5 minutes. Is the standard
charging amperage exceeded?
NO YES
If the amperage does not
exceed the standard charg-
ing amperage after 5 minutes,
replace the battery.
If the required charging time exceeds 5 hours, it is advisable to check
the charging amperage after 5 hours. If there is any change in the
amperage, readjust the voltage to obtain the standard charging amper-
age.
Leave the battery unused for more than 30 minutes before measuring
its open-circuit voltage.
12.8 V
→ Charging is complete.
12.0 ~ 12.7 V
→ Recharging is required.
Under 12.0 V
→ Replace the battery.
Leave the battery unused for
more than 30 minutes before
measuring its open-circuit voltage.
Set the charging voltage to 16-
17 V. (If the charging voltage is
lower, charging will be insuffi-
cient, if it is higher, the battery will
be over-charged.) NOTE:
NOTE:
Measure the open-circuit
voltage prior to charging.

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INSP
ADJ
ELECTRICAL
Charging method using a constant voltage charger
Measure the open-circuit
voltage prior to charging.
Connect a charger and
ammeter to the battery
and start charging.
NO
YESIs the amperage higher
than the standard charg-
ing amperage written on
the battery?
Charge the battery until the charging
voltage reaches 15 V.
Leave the battery unused for more than 30
minutes before measuring its open-circuit
voltage.
12.8 V
→ Charging is complete.
12.0 ~ 12.7 V
→ Recharging is required.
Under 12.0 V
→ Replace the battery.This type of battery charger cannot
charge an MF battery. A variable
voltage charger is recommended.Leave the battery unused for
more than 30 minutes before
measuring its open-circuit voltage. NOTE:
Set the charging time to a maxi-
mum of 20 hours. NOTE:
Constant amperage chargers
are not suitable for charging
MF batteries.
CAUTION:
Charger
Ammeter
Voltmeter

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INSP
ADJ
6. Install:
Battery
Battery band
7. Connect:
Battery leads
(to the battery terminals)
CAUTION:
First, connect the positive lead 1,
then the negative lead 2.
8. Check:
Battery terminals
Dirt
→ Clean with a wire
brush.
Loose connection
→ Connect
properly.
9. Lubricate:
Battery terminal
10. Install:
Seat
Recommended
lubricant:
Lithium soap base
grease
BATTERY REPLACEMENT
1. Replace:
Battery
CAUTION:
This battery is for YAMAHA
WR250F.
After filling the battery with elec-
trolyte, either charge it for at least
3 hours at the amperage specified
on the battery or let it sit for at
least 15 hours before using it.
EAS00181 FUSE INSPECTION
CAUTION:
To avoid a short circuit, always set
the main switch to “OFF” when
checking or replacing a fuse.
1. Remove:
Seat
Fuse cover6. Monter:
Batterie
Sangle de la batterie
7. Connecter:
Câbles de la batterie
(aux bornes de la batterie)
ATTENTION:
Connecter d’abord le câble positif 1,
puis le câble négatif 2.
8. Contrôler:
Bornes de la batterie
Saleté → Nettoyer avec une
brosse métallique.
Connexion lâche → Brancher
correctement.
9. Lubrifier:
Bornes de la batterie
10. Monter:
Selle
Lubrifiant recommandé:
graisse à savon de
lithium
REMPLACEMENT DE LA
BATTERIE
1. Remplacer:
Batterie
ATTENTION:
Cette batterie est destinée à la
YAMAHA WR250F.
Après avoir rempli la batterie d’élec-
trolyte, la charger pendant au moins 3
heures à l’ampérage spécifié sur la
batterie ou la laisser reposer pendant
au moins 15 heures avant de l’utiliser.
CONTROLE DES FUSIBLES
ATTENTION:
Pour éviter un court-circuit, toujours
placer le contacteur à clé sur “OFF”
avant de contrôler ou de remplacer un
fusible.
1. Déposer:
Selle
Couvercle de la boîte à fusibles
ELECTRICAL
PARTIE ELECTRIQUE

4 - 211
ENGENGINE REMOVAL
Extent of removal:
1 Engine removal
Extent of removal Order Part name Q’ty Remarks
Ignition coil
Disconnect the AC magneto lead.
Starter motor lead Disconnect at the starter motor side.
Negative battery lead Disconnect at the engine side.
Right engine guard
1 Neutral switch 1
2 Drive chain sprocket cover 1
3 Nut (drive sprocket) 1
Refer to “REMOVAL POINTS”. 4 Lock washer 1
5 Drive sprocket 1
6 Clip 1
7 Bolt (brake pedal) 1
8 Brake pedal 1
9 Upper engine bracket 2
10 Lower engine bracket 2
11 Engine mounting bolt 3
12 Pivot shaft 1
Refer to “REMOVAL POINTS”.
13 Engine 1
1

5 - 139
CHASREAR SHOCK ABSORBER
EC580000
REAR SHOCK ABSORBER
Extent of removal:
1 Rear shock absorber removal
2 Rear shock absorber disassembly
Extent of removal Order Part name Q’ty Remarks
REAR SHOCK ABSORBER REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Seat, fitting band and side covers Refer to “SEAT, FUEL TANK AND SIDE COVERS”
section in the CHAPTER 4.
Air filter case cover Refer to “AIR FILTER CLEANING” section in the
CHAPTER 3.
Silencer Refer to “EXHAUST PIPE AND SILENCER” section
in the CHAPTER 4.
Drain the coolant. Refer to “COOLANT REPLACEMENT” section in the
CHAPTER 3.
Coolant reservoir breather hose Disconnect at the coolant reservoir side.
Coolant reservoir hose Disconnect at the coolant reservoir side.
Battery Refer to “BATTERY INSPECTION AND
CHARGING” section in the CHAPTER 3.
Disconnect the starter relay coupler.
Starter motor lead Disconnect at the starter relay side.

6 - 1
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
EC610000
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC611000ELECTRICAL COMPONENTS
1Headlight
2Engine stop switch
3Clutch switch
4Diode
5Starter relay diode
6Throttle position sensor
7Starter relay
8Fuse
9Starting circuit cut-off relay
0TaillightANeutral switch
BStarter motor
CAC magneto
DRectifier/regulator
EIgnition coil
FSpark plug
GStart switch
HMain switch
ICDI unit
JBatteryCOLOR CODE
B ...................... Black
Br ..................... Brown
Gy .................... Gray
L ...................... Blue
O...................... Orange
R ...................... Red
Sb .................... Sky blue
W ..................... White
Y ...................... YellowB/L ................... Black/Blue
B/W .................. Black/White
L/B ................... Blue/Black
L/R ................... Blue/Red
L/Y ................... Blue/Yellow
L/W .................. Blue/White
R/B................... Red/Black
EC612000WIRING DIAGRAM
1 2345
678
90
A
B CDEFGH
I
J
WR
WR
R
BR/BBr
R
BR/BBr
RW
L/RL/BBB
SbL/W
L/YBBB
WY
RYW
R
LY
B
YLB/L
B
B
ON
OFF
10A
BB
OFF
STARTSTART
R-BrL/W
B
BrL/W
BrL/W
L/B-YB
YL
B
L-B
-Sb
B/WBBB
W/RB/W
R/BGyBrL/W
ON
STOP
OB
LYSbB/L
W RBrB/W
L/BGyWR/BO B
L Y SbB/L
B O
L/YSbL/R
R W
Y W
Y W
Y
L B
B
B
RRR/B
B Br B
B B B B
L/W
R
R
R R B
R
BrBr
L/W L/W
Br B
L/B
L/B
L/R

Br
R/B
L/B L/W
B/W
W W/RW
RO
L
Y
B/L
O

B
L
Y
B/LSbB/W
B
L/R L/Y L/Y
B
SbSb
BGy
CD
BH
5
9
G3 4
A 2I
EF
6 78
1
0J
WY
YW