2007 YAMAHA YZ125LC oil

5-4
CHAS
ROUE AVANT ET ROUE ARRIERE
VORDERRAD UND HINTERRAD
RUOTA ANTERIORE E RUOTA POSTERIORE
Disque de frein
1. Mesurer:
9Déflexion de disque de frein
(uniquement le disque de frein
arrière)
Utiliser le comparateur 1.
Hors spécificationExaminer le
voile de roue.
Si le voile de la roue est normal,
changer le disque de frein.
2. Mesurer:
9Epaisseur de disque de frein a
Hors limiteChanger.
Radachse
1. Messen:
9Radachsenbiegung
Abweichung von Spezifikation
Erneuern.
Die Messuhr 1verwenden.
HINWEIS:
Der Biegewert entspricht der Hälfte
der Messuhranzeige.
W
Niemals versuchen, eine verbogene
Achse geradezubiegen.
Axe de roue
1. Mesurer:
9Les flexions de l’axe de roue
Hors-spécification Changer.
Utiliser le comparateur 1.
N.B.:
La valeur de flexion est égale à la moi-
tié de la lecture du comparateur.
XG
Ne jamais tenter de redresser un axe
tordu.
IC514200
Asse della ruota
1. Misurare:
9Curvature dell’asse della ruota
Fuori specificaSostituirlo.
Usare il comparatore 1.
NOTA:
Il valore di curvatura equivale a metà
del valore letto dal comparatore.
T
Non tentare di raddrizzare un asse
piegato.
Limite de torsion de l’axe
de roue:
0,5 mm (0,020 in)
Limite d’usure de disque:
Standard Avant3,0 mm (0,12 in) 2,5 mm (0,10 in)
Arrière 4,0 mm (0,16 in) 3,5 mm (0,14 in)
IC594200
Disco del freno
1. Misurare:
9Inflessione del disco del freno
(soltanto il disco del freno
posteriore)
Usare il comparatore 1.
Fuori specificaIspezionare la
scentratura della ruota.
Se la scentratura della ruota è in
buone condizioni, sostituire il
disco del freno.
2. Misurare:
9Spessore del disco del freno a
Fuori limiteSostituirlo.
Limite di curvatura
dell’asse della ruota:
0,5 mm (0,020 in)
Limite di usura del disco
Valore normaleAnteriore3,0 mm (0,12 in) 2,5 mm (0,10 in)
Posteriore4,0 mm (0,16 in) 3,5 mm (0,14 in)
Bremsscheibe
1. Messen:
9Bremsscheibenschlag (Nur
Hinterrad-Bremsscheibe)
Die Messuhr 1verwenden.
Abweichung von Spezifikation
Schlag der Felge prüfen.
Falls der Felgenschlag inner-
halb des zulässigen Bereiches
liegt, die Bremsscheibe erneu-
ern.
2. Messen:
9Bremsscheibendicke a
Außerhalb des Grenzwertes
Erneuern.
Radachsen-Durchbie-
gungsgrenze:
0,5 mm (0,020 in)
Bremsscheibe-
Verschleißgrenze:
Standard
Vorn3,0 mm (0,12 in) 2,5 mm (0,10 in)
Hinten 4,0 mm (0,16 in) 3,5 mm (0,14 in)
Limite de déflection de
disque:
Standard
Arrière—0,15 mm (0,006 in)
Bremsscheiben-
Schlaggrenze:
Standard
Hinten —0,15 mm (0,006 in)
Limite di inflessione del
disco:
Valore normale
Posteriore—0,15 mm (0,006 in)
1C3-9-32-5A 4/7/06 2:44 PM Page 9

5-5
CHASFRONT WHEEL AND REAR WHEEL
EC595000
ASSEMBLY AND INSTALLATION
EC595101
Front wheel
1. Install:
9Bearing (left) 1
9Spacer 2
9Bearing (right) 3
9Oil seal 4
NOTE:
9Apply the lithium soap base grease on the
bearing and oil seal lip when installing.
9Use a socket that matches the outside diam-
eter of the race of the bearing.
9Left side of bearing shall be installed first.
9Install the oil seal with its manufacture’s
marks or numbers facing outward.
cC
Do not strike the inner race of the bearing.
Contact should be made only with the out-
er race.
2. Install:
9Brake disc 1
9Bolt (brake disc) 2
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
3. Install:
9Collar 1
NOTE:
9Apply the lithium soap base grease on the oil
seal lip.
9Install the collars with their projections afacing
the wheel.
4. Install:
9Wheel
NOTE:
Install the brake disc 1between the brake pads
2correctly.
12 Nm (1.2 m•kg, 8.7 ft•lb)
1C3-9-32-5A 4/7/06 2:44 PM Page 10

5-7
CHASFRONT WHEEL AND REAR WHEEL
NOTE:
9Apply the lithium soap base grease on the
bearing and oil seal lip when installing.
9Install the bearing with seal facing outward.
9Use a socket that matches the outside diam-
eter of the race of the bearing.
9Right side of bearing shall be installed first.
9Install the oil seal with its manufacture’s
marks or numbers facing outward.
cC
Do not strike the inner race of the bearing.
Contact should be made only with the out-
er race.
2. Install:
9Brake disc 1
9Bolt (brake disc) 2
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
EC5251A1
Rear wheel
1. Install:
9Bearing (right) 1
9Circlip 2
9Spacer 3
9Bearing (left) 4
9Oil seal 5
14 Nm (1.4 m•kg, 10 ft•lb)
1C3-9-32-5A 4/7/06 2:45 PM Page 14

5-8
CHASFRONT WHEEL AND REAR WHEEL
3. Install:
9Driven sprocket 1
9Bolt (driven sprocket) 2
9Plain washer (driven sprocket) 3
9Nut (driven sprocket) 4
NOTE:
Tighten the nuts in stage, using a crisscross pat-
tern.
4. Install:
9Collar 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
5. Install:
9Wheel
NOTE:
Install the brake disc 1between the brake pads
2correctly.
6. Install:
9Drive chain 1
NOTE:
Push the wheel 2forward and install the drive
chain.
7. Install:
9Chain puller (left) 1
9Wheel axle 2
NOTE:
9Install the chain puller (left), and insert the
wheel axle from left side.
9Apply the lithium soap base grease on the
wheel axle.
42 Nm (4.2 m•kg, 30 ft•lb)
1C3-9-32-5A 4/7/06 2:45 PM Page 16

5-24
CHASFRONT BRAKE AND REAR BRAKE
2. Install:
9Brake hose holder 1
9Screw (brake hose holder) 2
cC
After installing the brake hose holders,
make sure the brake hose does not contact
the spring (rear shock absorber). If it does,
correct its twist.
EC5A5620
Brake fluid
1. Fill:
9Brake fluid
Until the fluid level reaches “LOWER” level
line a.
w
9Use only the designated quality brake fluid:
otherwise, the rubber seals may deterio-
rate, causing leakage and poor brake per-
formance.
9Refill with the same type of brake fluid;
mixing fluids may result in a harmful chemi-
cal reaction and lead to poor performance.
9Be careful that water does not enter the
master cylinder when refilling. Water will
significantly lower the boiling point of the
fluid and may result in vapor lock.
cC
Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.
AFront
BRear
Recommended brake fluid:
DOT #4
2 Nm (0.2 m•kg, 1.4 ft•lb)
1C3-9-32-5A 4/7/06 2:45 PM Page 48

Extent of removal Order Part name Q’ty Remarks
FRONT FORK DISASSEMBLY
1Adjuster 1 Drain the fork oil. Use special tool.
Refer to “REMOVAL POINTS”.
2Fork spring 1
3Dust seal 1
4Stopper ring 1 Refer to “REMOVAL POINTS”.
5Inner tube 1
6Outer tube 1
7Piston metal 1
8Slide metal 1
9Oil seal washer 1
0Oil seal 1
qBase valve 1 Drain the fork oil. Use special tool.
wDamper assembly 1 Refer to “REMOVAL POINTS”.
5-27
CHASFRONT FORK
EC558000
FRONT FORK DISASSEMBLY
1
Extent of removal:1Oil seal removal2Damper assembly removal
2






29 Nm (2.9 m•kg, 21 ft•lb)
1 Nm (0.1 m•kg, 0.7 ft•lb)
30 Nm (3.0 m•kg, 22 ft•lb)
55 Nm (5.5 m•kg, 40 ft•lb)29 Nm (2.9 m•kg, 21 ft•lb)
1C3-9-32-5B 4/7/06 2:47 PM Page 4

5-28
CHASFRONT FORK
EC556000
HANDLING NOTE
NOTE:
The front fork requires careful attention. So it is
recommended that the front fork be maintained
at the dealers.
cC
To prevent an accidental explosion of air,
the following instructions should be ob-
served:
9The front fork with a built-in piston rod
has a very sophisticated internal con-
struction and is particularly sensitive to
foreign material.
Use enough care not to allow any foreign
material to come in when the oil is re-
placed or when the front fork is disassem-
bled and reassembled.
9Before removing the base valves or front
forks, be sure to extract the air from the air
chamber completely.
EC553000
REMOVAL POINTS
EC553311
Damper assembly
1. Loosen:
9Damper assembly 1
NOTE:
Before removing the front fork from the
machine, loosen the damper assembly with
the cap bolt ring wrench 2.
Cap bolt ring wrench:
YM-01501/90890-01501
1C3-9-32-5B 4/7/06 2:47 PM Page 6

5-29
CHASFRONT FORK
Adjuster
1. Drain the outer tube of its front fork oil at its
top.
2. Loosen:
9Adjuster 1
3. Remove:
9Adjuster 1
NOTE:
9While compressing the inner tube 2, set the
cap bolt ring wrench 4between the inner tube
and locknut 3.
9Hold the locknut and remove the adjuster.
cC
Do not remove the locknut as the damper
rod may go into the damper assembly and
not be taken out.
Cap bolt ring wrench:
YM-01501/90890-01501
EC553201
Inner tube
1. Remove:
9Dust seal 1
9Stopper ring 2
Using slotted-head screwdriver.
cC
Take care not to scratch the inner tube.
2. Remove:
9Inner tube 1
Oil seal removal steps:
9Push in slowly athe inner tube just be-
fore it bottoms out and then pull it back
quickly b.
9Repeat this step until the inner tube can
be pulled out from the outer tube.
1C3-9-32-5B 4/7/06 2:47 PM Page 8