2001 YAMAHA YZ125LC oil type

3-13
INSP
ADJ
TRANSMISSION OIL REPLACEMENT
3. Check:
9Transmission oil level
EC35K002
TRANSMISSION OIL REPLACEMENT
1. Start the engine and warm it up for several
minutes and wait for five minute.
2. Place the machine on a level place and hold
it on upright position by placing the suitable
stand under the engine.
3. Place a suitable container under the engine.
Transmission oil level checking steps:
9Remove the oil check bolt 1.
9Inspect the oil level.
NOTE:
Be sure the machine is positioned straight
up when inspecting the oil level.
w
Never attempt to remove the oil check bolt
just after high speed operation. The heat-
ed oil could spout out, causing danger.
Wait until the oil cools down.
Oil flows out ÕOil level is correct.
Oil does not flow out ÕOil level is low.
Add transmission
oil until oil flows
out.
9Inspect the gasket (oil check bolt),
replace if damaged.
9Tighten the oil check bolt.
Recommended oil:
Yamalube 4 (10W-30) or SAE
10W-30 type SE motor oil
Oil check bolt:
10 Nm (1.0 m•kg, 7.2 ft•lb)
5MV-9-30-3A 6/19/00 1:52 PM Page 34

3-13
CHANGEMENT DE L’HUILE DE BOITE DE VITESSES
ERNEUERUNG DES GETRIEBEÖLS
SOSTITUZIONE DELL’OLIO DELLA TRASMISSIONE
INSP
ADJ
Prüfschritte des Getriebeölstan-
des:
9
Die Ölprüfschraube 1ausbauen.
9Den Ölstand prüfen.
ANMERKUNG:
Das Motorrad auf eine gerade
Unterlage aufstellen, wenn der
Ölstand überprüft wird, Eine leich-
te Neigung des Motorrads kann zu
falschen Ablesewerten führen.
W
Niemals die Ölprüfschraube
sofort nach Hochgeschwindig-
keitsfahrt ausbauen, da das
heiß Öl ansonsten heraussprit-
zen und zur Verbrennungen
führen könnte. Einige Zeit war-
ten, bis sich das Öl abgekühlt
hat.
Öl läuft ab ÕDen Ölstand ist
richtig.
Öl läuft nicht abÕDen Ölstand ist
niedrig.
Das Getriebeöl
auffüllen bis
das Öl abläuft.
9Die Dichtung (Prüfschraube)
prüfen; erneuern falls beschä-
digt.
9Die Prüfschraube festziehen.
Emphohlenes Öl:
Yamalube 4 (10W-30)
oder Motoröl SAE
10W-30 SE
Procédure de contrôle de niveau
d’huile de boîte de vitesses:
9Déposer le boulon de contrôle 1.
9Examiner le niveau d’huile.
N.B.:
La motocyclette doit être bien verti-
cale: une légère inclinaison de côté
peut entraîner des erreurs de lectu-
re.
XG
Ne jamais dévisser complètement
le boulon de contrôle tout de suite
après avoir roulé à grande vites-
se. L’huile bouillante risque
d’être projetée sous pression et
provoquer de graves brûlures. Il
faut attendre que l’huile ait
refroidi.
Huile s’écoule ÕLe niveau d’huile
ves l’extérieur est correct.
Huile ne ÕLe niveau
s’écoulepas vers d’huile est bas.
l’extérieur Ajouter l’huile de
boîte de vitesses
jusqu’à ce que
l’huile dèborde.
9Examiner le joint (boulon de
contrôle), changer si endommagé.
9Serrer le boulon de contrôle.
3. Kontrollieren:
9Getriebeölstand3. Contrôler:
9Niveau d’huile de boîte de
vitesses
CHANGEMENT DE L’HUILE DE
BOITE DE VITESSES
1. Démarreur le moteur, le laisser
chauffer quelques minutes et
attendre.
2. Placer la machine sur une surface
de niveau et la maintenir en posi-
tion verticale en plaçant le support
convenable sous le moteur.
3. Placer un récipient convenable
sous le moteur.3. Controllare:
9Livello dell’olio della trasmis-
sione
Passi del controllo del livello
dell’olio della trasmissione:
9Togliere il bullone di controllo
dell’olio 1.
9Ispezionare il livello dell’olio.
NOTA:
Assicurarsi che il veicolo sia in
posizione perfettamente verticale
quando si ispeziona il livello
dell’olio.
T
Non tentare mai di togliere il bul-
lone di controllo dell’olio subito
dopo il funzionamento ad alta
velocità. L’olio riscaldato potreb-
be schizzare fuori, provocando
pericolo. Attendere che l’olio si
raffreddi.
Fuoriesce olio ÕIl livello dell’olio
è corretto.
Non fuoriesce ÕIl livello dell’olio
olio è basso.
Aggiungere olio
per trasmissioni
finché non fuo-
riesce olio.
9Ispezionare la guarnizione (bullo-
ne di controllo dell’olio), sosti-
tuirla se danneggiata.
9Serrare il bullone di controllo
dell’olio.
Huile recommandée:
Huile Yamalube 4
(10W-30) ou huile
moteur SAE 10W-30
type SE
Boulon de contrôle:
10 Nm
(1,0 m•kg, 7,2 ft•lb)
Olio raccomandato:
Olio per motore
Yamalube 4 (10W-30)
oppure SAE 10W-30
del tipo SE
Bullone di controllo
dell’olio: 10 Nm
(1,0 m•kg,7,2 ft•lb)
Prüfschraube:
10 Nm
(1,0 m•kg, 7,2 ft•lb)
ERNEUERUNG DES GETRIEBEÖLS
1. Den Motor anlassen und für eini-
ge Minuten warmlaufen lassen
und für fünf Minuten warten.
2. Die Maschine auf ebenem Boden
abstellen und den geeigneten
Ständer unter dem Motor anord-
nen um die Maschine aufrecht zu
halten.
3. Ein geeigneten Auffanggefäß
unter dem Motor anordnen.
IC35K002
SOSTITUZIONE DELL’OLIO
DELLA TRASMISSIONE
1. Avviare il motore, scaldarlo per
diversi minuti e attendere cinque
minuti.
2. Collocare il veicolo in un luogo
piano e tenerlo in posizione verti-
cale collocando sotto il motore
l’apposito supporto.
3. Collocare sotto il motore un conte-
nitore adatto.
5MV-9-30-3A 6/19/00 1:52 PM Page 35

3-14
INSP
ADJ
PILOT AIR SCREW ADJUSTMENT
4. Remove:
9Oil drain bolt 1
9Oil filler cap 2
Drain the transmission oil.
5. Install:
9Aluminum washer
9Oil drain bolt 1
6. Fill:
9Transmission oil
7. Check:
9Oil leakage
8. Check:
9Transmission oil level
9. Install:
9Oil filler cap 2
EC35L002
PILOT AIR SCREW ADJUSTMENT
1. Adjust:
9Pilot air screw 1
Recommended oil:
Yamalube 4 (10W-30) or SAE
10W-30 type SE motor oil
Oil capacity
(periodic oil change):
0.65 L (0.57 Imp qt, 0.69 US qt)
Adjustment steps:
9Screw in the pilot air screw until it is
lightly seated.
9Back out by the specified number of
turns.
Pilot air screw:
1-1/4 turns out
*1-1/2 turns out
20 Nm (2.0 m•kg, 14 ft•lb)
*For EUROPE
5MV-9-30-3A 6/19/00 1:52 PM Page 36

5-25
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.
EC5A5600
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
4 Nm (0.4 m•kg, 2.9 ft•lb)
Recommended brake fluid:
DOT #4
5MV-9-30-5A 6/19/00 1:36 PM Page 50

5-29
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 cap bolts or front
forks, be sure to extract the air from the air
chamber completely.
EC553000
REMOVAL POINTSEC553151
Cap bolt
1. Remove:
9Cap bolt 1
From the outer tube.
NOTE:
Before removing the front fork from the machine,
loosen the cap bolt.
2. Remove:
9Cap bolt 1
NOTE:
9While compressing the fork spring, set the thin
type spanners 2between the spacer 3and
spring guide 4.
9Hold the locknut 5and remove the cap bolt.
5MV-9-30-5B 6/19/00 1:29 PM Page 6

5-60
CHASREAR SHOCK ABSORBER
EC586000
HANDLING NOTE
w
This shock absorber is provided with a
separate type tank filled with high-pressure
nitrogen gas. To prevent the danger of ex-
plosion, read and understand the following
information before handling the shock ab-
sorber.
The manufacturer can not be held respon-
sible for property damage or personal in-
jury that may result from improper han-
dling.
1. Never tamper or attempt to disassemble
the cylinder or the tank.
2. Never throw the shock absorber into an
open flame or other high heat. The shock
absorber may explode as a result of ni-
trogen gas expansion and/or damage to
the hose.
3. Be careful not to damage any part of the
gas tank. A damaged gas tank will impair
the damping performance or cause a
malfunction.
4. Take care not to scratch the contact sur-
face of the piston rod with the cylinder;
or oil could leak out.
5. Never attempt to remove the plug at the
bottom of the nitrogen gas tank. It is very
dangerous to remove the plug.
6. When scrapping the shock absorber, fol-
low the instructions on disposal.
EC587000
NOTES ON DISPOSAL (YAMAHA DEAL-
ERS ONLY)
Before disposing the shock absorber, be sure to
extract the nitrogen gas from valve 1. Wear eye
protection to prevent eye damage from escaping
gas and/or metal chips.
w
To dispose of a damaged or worn-out
shock absorber, take the unit to your
Yamaha dealer for this disposal procedure.
5MV-9-30-5D 6/19/00 1:26 PM Page 18

7-2
TUNSETTING
That is:
9Higher temperature expands the air with its
resultant reduced density.
9Higher humidity reduces the amount of oxygen
in the air by so much of the water vapor in the
same air.
9Lower atmospheric pressure (at a high altitude)
reduces the density of the air.
EC713001
Test run
After warming up the engine equipped with the
standard type carburetor(s) and spark plug(s),
run two or three laps of the circuit and check the
smooth operation of the engine and discoloration
of spark plug(s).
ŒNormal
ºOver burned (too lean)
Oil fouled (too rich)
Discoloration Condition of spark plug
NormalInsulator is dry and
burnt brown.
Over burned
Insulator is whitish.
(too lean)
Oil fouled Insulator is sooty and
(too rich) wet.
A
B
C
5MV-9-30-7A 6/19/00 1:24 PM Page 4