2006 YAMAHA WR 250F wheel bolts

3 - 16
INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
CoolantCheck that coolant is filled up to the radiator cap.
Check the cooling system for leakage.P.3-21 ~ 29
FuelCheck that a fresh gasoline is filled in the fuel tank. Check the
fuel line for leakage.P.1-49
Engine oilCheck that the oil level is correct. Check the crankcase and
frame oil line for leakage.P.3-39 ~ 47
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-29 ~ 31
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-31 ~ 33
Brakes Check the play of front brake and effect of front and rear brake. P.3-65 ~ 77
Drive chainCheck drive chain slack and alignment. Check that the drive
chain is lubricated properly.P.3-79 ~ 83
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-99 ~ 101
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-101 ~ 103
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-85 ~ 97
Cables (wires)Check that the clutch and throttle cables move smoothly. Check
that they are not caught when the handlebars are turned or when
the front forks travel up and down.—
Exhaust pipeCheck that the exhaust pipe is tightly mounted and has no
cracks.P.4-7 ~ 11
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-77
Lubrication Check for smooth operation. Lubricate if necessary. P.3-105
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-59
Lead connectorsCheck that the AC magneto, CDI unit, and ignition coil are
connected tightly.P.1-9
SettingsIs the machine set suitably for the condition of the racing course
and weather or by taking into account the results of test runs
before racing? Are inspection and maintenance completely
done?P.7-1 ~ 40

5 - 13
CHASFRONT WHEEL AND REAR WHEEL
EC595000ASSEMBLY AND INSTALLATION
Front wheel
1. Install:
Bearing (left)
1
Spacer
2
Bearing (right)
3
Oil seal
4
NOTE:Apply the lithium soap base grease
on the bearing and oil seal lip
when installing.
Use a socket that matches the out-
side diameter of the race of the
bearing.
Left side of bearing shall be
installed first.
Install the oil seal with its manufac-
ture’s marks or numbers facing
outward.
CAUTION:
Do not strike the inner race of the
bearing. Contact should be made
only with the outer race.
New
2. Install:
Brake disc
1
Bolt (brake disc)
2
NOTE:Tighten the bolts in stage, using a
crisscross pattern.
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
3. Install:
Collar
1
NOTE:Apply the lithium soap base grease
on the oil seal lip.
4. Install:
Speed sensor
1
NOTE:Apply the lithium soap base grease
on the oil seal lip of the speed sen-
sor.
Make sure the two projections
a in
the wheel hub are meshed with the
two slots
b in the speed sensor.
b a1
B
ASSEMBLAGE ET MONTAGE
Roue avant
1. Monter:
Roulement (gauche) 1
Entretoise 2
Roulement (droit) 3
Bague d’étanchéité 4
N.B.:
Appliquer de la graisse à savon de
lithium sur le roulement et la lèvre de
la bague d’étanchéité lors du montage.
Utiliser une douille de même diamètre
que le diamètre extérieur de la cage du
roulement.
Monter d’abord le roulement de gau-
che.
Monter la bague d’étanchéité en posi-
tionnant vers l’extérieur la marque ou
le numéro du fabricant.
ATTENTION:
Ne pas frapper sur la cage interne du
roulement. Le contact ne peut avoir
lieu qu’avec la cage externe.
New
2. Monter:
Disque de frein 1
Boulon (disque de frein) 2
N.B.:
Serrer les boulons par étapes et en procé-
dant en croix.
T R..12 Nm (1,2 m · kg, 8,7 ft · lb)
3. Monter:
Entretoise épaulée 1
N.B.:
Appliquer de la graisse à savon de
lithium sur la lèvre de la bague d’étan-
chéité.
4. Monter:
Capteur de vitesse 1
N.B.:
Appliquer de la graisse à base de
savon au lithium sur la lèvre de bague
d’étanchéité du capteur de vitesse.
Veiller à ce que les deux ergots a du
moyeu de roue s’engrènent dans les
deux fentes b du capteur de vitesse.
ROUE AVANT ET ROUE ARRIERE

5 - 17
CHASFRONT WHEEL AND REAR WHEEL
Rear wheel
1. Install:
Bearing (right)
1
Circlip
2
Spacer
3
Bearing (left)
4
Oil seal
5
NOTE:Apply the lithium soap base grease
on the bearing and oil seal lip
when installing.
Install the bearing with seal facing
outward.
Use a socket that matches the out-
side diameter of the race of the
bearing.
Right side of bearing shall be
installed first.
Install the oil seal with its manufac-
ture’s marks or numbers facing
outward.
CAUTION:
Do not strike the inner race of the
bearing. Contact should be made
only with the outer race.
New
New
2. Install:
Brake disc
1
Bolt (brake disc)
2
NOTE:Tighten the bolts in stage, using a
crisscross pattern.
T R..14 Nm (1.4 m · kg, 10 ft · lb)
3. Install:
Rear wheel sprocket
1
Bolt (rear wheel sprocket)
2
Washer
(rear wheel sprocket)
3
Nut (rear wheel sprocket)
4
NOTE:Tighten the nuts in stage, using a
crisscross pattern.
T R..50 Nm (5.0 m · kg, 36 ft · lb)
4. Install:
Collar
1
NOTE:Apply the lithium soap base grease
on the oil seal lip.
Roue arrière
1. Monter:
Roulement (droit) 1
Circlip 2
Entretoise 3
Roulement (gauche) 4
Bague d’étanchéité 5
N.B.:
Appliquer de la graisse à savon de
lithium sur le roulement et la lèvre de
la bague d’étanchéité lors du montage.
Monter le roulement avec son joint
dirigé vers l’extérieur.
Utiliser une douille de même diamètre
que le diamètre extérieur de la cage du
roulement.
Monter d’abord le côté droit du roule-
ment.
Monter la bague d’étanchéité en posi-
tionnant vers l’extérieur la marque ou
le numéro du fabricant.
ATTENTION:
Ne pas frapper sur la cage interne du
roulement. Le contact ne peut avoir
lieu qu’avec la cage externe.
New
New
2. Monter:
Disque de frein 1
Boulon (disque de frein) 2
N.B.:
Serrer les boulons par étapes et en procé-
dant en croix.
T R..14 Nm (1,4 m · kg, 10 ft · lb)
3. Monter:
Couronne arrière 1
Boulon (couronne arrière) 2
Rondelle
(couronne arrière) 3
Ecrou (couronne arrière) 4
N.B.:
Serrer les écrous par étapes et en procé-
dant en croix.
T R..50 Nm (5,0 m · kg, 36 ft · lb)
4. Monter:
Entretoise épaulée 1
N.B.:
Appliquer de la graisse à savon de
lithium sur la lèvre de la bague d’étan-
chéité.
ROUE AVANT ET ROUE ARRIERE