battery YAMAHA WR 250F 2006 User Guide

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.

3 - 118
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

3 - 127
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 - 219
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 - 141
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.
Air induction hose (air cut-off valve-air filter
case)Disconnect at the air filter case side.
Cylinder head breather hose Disconnect at the air filter case 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
2Multi-function display
3Engine stop switch
4Clutch switch
5Diode
6Starter relay diode
7Throttle position sensor
8Starter relay
9Fuse
0Starting circuit cut-off relay
ATaillightBNeutral switch
CStarter motor
DAC magneto
ERectifier/regulator
FIgnition coil
GSpark plug
HStart switch
IMain switch
JCDI unit
KSpeed sensor
LBatteryCOLOR CODE
B ...................... Black
Br ..................... Brown
Ch .................... Chocolate
Dg .................... Dark green
Gy .................... Gray
L ...................... Blue
O...................... Orange
R ...................... Red
Sb .................... Sky blue
W ..................... WhiteY ...................... Yellow
B/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
R/W.................. Red/White
EC612000WIRING DIAGRAM
1 234
56
789
0A
B C
D EFGH
I
J
K
L
B/L
W
W
R
BR/BBr
R
BR/BBr
R
Y
Y
L/R/BBB
SbL/W
L/YBBB
WY
RY
R
LY
B
YLB/L
B
B
ON
OFF
10A
BB
OFF
START
R-BrL/W
B
BrL/W
BrL/W
L/B
-Y
Y
B
LY
B
L/WSb
B/WBBB
W/R/W
R/
BGyBrL/W
ON
STOP
O
LSbB/L
W RBrB/W
L
/
BGyWR
/B
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
WW
/RW
RO
L
Y
ELO
B
L
Y
B/LSb
SbB/W
B
B
L/R L/Y L/Y
B
SbSb
B
Gy
D
E
CI
6
H4 5
B3J
K
2FG
7
8L9
1A
W
B
R/W
Ch
Dg
Y
B BrRW
WRB/W
SIGNAL
+
Backup
SLCT1
SLCT2
RST
GND
BrR/WB
B
R/WBr
WRB/W
R B
W
ChDgYB
B/WWRB/WWR
0
R
W
W W
B/L
Y B
RB
B
L
L
SbBB/LYO
L

6 - 8
–+ELECIGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to ignition system failure
and for checking the spark plug which will not spark.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
*3 marked: Only when the ignition checker is used.
NOTE:•Remove the following parts before inspection.
1) Seat
2) Fuel tank
•Use the following special tools in this inspection.
*1 Check fuse.Replace fuse and check
wire harness.
*2 Check battery. Recharge or replace.
Spark gap test*3 Clean or replace spark
plug.
Check entire ignition system for
connection.
(couplers, leads and ignition coil)Repair or replace.
Check engine stop switch. Replace.
Check main switch.Replace.
Check ignition coil. Primary coil Replace.
Secondary coil Replace.
Check AC magneto. Pickup coil Replace.
Check neutral switch. Repair or replace.
Replace CDI unit.
Dynamic spark tester:
YM-34487
Ignition checker:
90890-06754
Pocket tester:
YU-3112-C/
90890-03112
No good
OK
No good
OK
Spark
No spark
No good
OK
No good
OK
No good
OK
No good
OKNo good
No good
OK
No good
OK

6 - 15
–+ELECIGNITION SYSTEM
2. Inspect:
•Rubber part
a
Tears/damage
→ Replace.
a
MAIN SWITCH INSPECTION
1. Inspect:
•Main switch conduct
Continuous while the main switch is
moved to “OFF”
→ Replace.
Not continuous while the main switch
is moved to “ON”
→ Replace. Tester (+) lead →
Red lead 1

Tester (–) lead →
Brown lead 2

R
1
Br
2
Tester
selector
position
ON
Ω
×
1
OFF
2. Inspect:
•Main switch indicator light
Use 12 V battery.
Indicator light does not come on
→
Replace.Battery (+) lead →

Red/Black lead 1
Battery (–) lead →
Black lead 2

3. Inspect:
•Rubber part
a
Tears/damage
→ Replace.
a
2. Contrôler:
Pièce en caoutchouc a
Déchirures/endommagement →
Remplacer.
CONTROLE DU CONTACTEUR A
CLE
1. Contrôler:
Continuité du contacteur à clé
Continuité lorsque le contacteur à clé est
placé sur “OFF” → Remplacer.
Pas de continuité lorsque le contacteur à
clé est placé sur “ON” → Remplacer. Fil (+) du multimètre →
fil rouge 1
Fil (–) du multimètre → fil brun 2
R
1 Br
2 Position du
sélecteur du
multimètre
ON
Ω × 1
OFF
2. Contrôler:
Témoin de l’interrupteur à clé
Utiliser une batterie 12 V.
Le témoin ne s’allume pas → Rempla-
cer.Câble (+) de la batterie →
fil rouge/noir 1
Câble (–) de la batterie →
fil noir 2
3. Contrôler:
Pièce en caoutchouc a
Déchirures/endommagement →
Remplacer.
SYSTEME D’ALLUMAGE

6 - 21
–+ELECELECTRIC STARTING SYSTEM
ELECTRIC STARTING
SYSTEM
STARTING CIRCUIT CUT-OFF
SYSTEM OPERATION
If the main switch is set to “ON”, the
starter motor can only operate if at
least one of the following conditions
is met:
•The transmission is in neutral (the
neutral switch is closed).
•The clutch lever is pulled to the
handlebar (the clutch switch is
closed).
The starting circuit cut-off relay pre-
vents the starter motor from operat-
ing when neither of these conditions
has been met. In this instance, the
starting circuit cut-off relay is open so
current cannot reach the starter
motor. When at least one of the
above conditions has been met the
starting circuit cut-off relay is closed
and the engine can be started by
pressing the start switch.
WHEN THE TRANS-
MISSION IS IN NEU-
TRAL
WHEN THE CLUTCH
LEVER IS PULLED
TO THE HANDLEBAR
1Battery
2Main fuse
3Main switch
4Starting circuit cut-off relay
5Start switch
6Diode
7Clutch switch
8Neutral switch
9Starter relay
0Starter motor
12
M
3
4
5
8 76 9
0
DEMARRAGE
ELECTRIQUE
FONCTIONNEMENT DU
DISPOSITIF DE COUPURE DU
CIRCUIT DE DEMARRAGE
Si le contacteur à clé est sur “ON”, le
démarreur ne peut fonctionner que si
l’une au moins des conditions suivantes
est remplie:
la boîte de vitesses est au point mort
(le circuit du contacteur de point mort
est fermé).
le levier d’embrayage est tiré vers le
guidon (le contacteur d’embrayage est
fermé).
Le relais de coupe-circuit de démarrage
empêche le démarreur de fonctionner
lorsque aucune des deux conditions n’est
remplie. Dans ce cas, le relais de coupe-
circuit de démarrage est ouvert, de sorte
que le courant ne peut atteindre le
démarreur. Lorsqu’une au moins des
conditions ci-dessus est remplie, le relais
de coupe-circuit de démarrage est fermé
et le moteur peut être démarré à l’aide du
contacteur du démarreur.
LORSQUE LA BOITE
DE VITESSE EST AU
POINT MORT
LORSQUE LE LEVIER
D’EMBRAYAGE EST
TIRE VERS LE GUI-
DON
1
Batterie
2
Fusible principal
3
Contacteur à clé
4
Relais de coupe-circuit de démarrage
5
Contacteur du démarreur
6
Diode
7
Contacteur d’embrayage
8
Contacteur de point mort
9
Relais de démarreur
0
Démarreur
DEMARRAGE ELECTRIQUE

6 - 23
–+ELECELECTRIC STARTING SYSTEM
INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
*3 marked: Refer to “MAIN SWITCH INSPECTION” section.
*4 marked: Refer to “NEUTRAL SWITCH INSPECTION” section.
NOTE:•Remove the following parts before inspection.
1) Seat
2) Rear fender
•Use 12 V battery in this inspection.
•Use the following special tools in this inspection.
*1 Check fuse.Replace fuse and check
wire harness.
*2 Check battery. Recharge or replace.
Check each coupler and wire
connection.Repair or replace.
*3 Check main switch. Replace.
Check starter motor operation. Repair or replace.
Check starting circuit cut-off relay. Replace.
Check starter relay.Replace.
*4 Check neutral switch. Replace.
Check clutch switch.Replace.
Check diode.Replace.
Check start switch.Replace.
Pocket tester:
YU-3112-C/
90890-03112
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good
OK
No good