2001 YAMAHA YZ125LC oil change

4-33
ENG
EMBRAYAGE ET PIGNON MENE PRIMAIRE
KUPPLUNG UND PRIMÄRABTRIEBSZAHNRAD
FRIZIONE E INGRANAGGIO CONDOTTO PRIMARIO
Kupplungsdeckel
1. Prüfen:
9Kupplungsdeckel a
Abnutzung/BeschädigungÕ
Erneuern.IC494200Coperchio della frizione
1. Ispezionare:
9Parte del cuscinetto dell’asta di
spinta a
Usura/DanniÕSostituirlo.
Reibscheibe
1. Messen:
9Reibscheibendicke
Abweichung von Spezifikation
ÕDie Reibscheiben als Satz
erneuern.
Die Reibscheiben an vier Stel-
len messen.
Kuplungsscheibe
1. Messen:
9Verzug der Kupplungsschei-
ben
Abweichung von Spezifikation
ÕKupplungsscheiben als Satz
erneuern.
Eine Richtplatte 1und eine
Fühlerlehre 2verwenden.
Schubhebel und Schubstange
1. Prüfen:
9Schubhebel 1
9Schubstange 2
Abnutzung/BeschädigungÕ
Erneuern.Disque de friction
1. Mesurer:
9Epaisseur de disque de friction
Hors-spécificationÕChanger
tous les disques de friction.
Mesurer chaque disque en
quatre endroits.
Disque d’embrayage
1. Mesurer:
9Voile de disque d’embrayage
Hors-spécificationÕChanger
tous les disques d’embrayage.
Utiliser une plaque à surfacer 1
et une jauge d’épaisseur 2.
Levier de poussée et champignon de
débrayage
1. Examiner:
9Levier de poussée 1
9Champignon de débrayage 2
Usure/endommagementÕChan-
ger.
Couvercle d’embrayage
1. Examiner:
9Couvercle d’embrayage a
Usure/endommagementÕChan-
ger.IC484500Disco di innesto
1. Misurare:
9Spessore del disco di innesto
Fuori specificaÕSostituire il
disco di innesto come set.
Misurare su tutti e quattro i
punti.
IC484600
Disco della frizione
1. Misurare:
9Svergolamento del disco della
frizione
Fuori specificaÕSostituire il
disco della frizione come set.
Usare un piano di riscontro 1e
uno spessimetro 2.
IC494100
Leva di spinta e asta di spinta
1. Ispezionare:
9Leva di spinta 1
9Asta di spinta 2
Usura/DanniÕSostituirle.
Standard
2,9~3,1 mm 2,8 mm
(0,114~0,122 in) (0,110 in)
Reibscheibendicke:
Verzungsgrenze:
0,2 mm (0,008 in)
Valore normale
2,9~3,1 mm 2,8 mm
(0,114~0,122 in) (0,110 in)
Spessore del disco di inne-
sto:
Limite di svergolamento:
0,2 mm (0,008 in)
Limite de déformation:
0,2 mm (0,008 in)
Standard
2,9~3,1 mm 2,8 mm
(0,114~0,122 in) (0,110 in)
Epaisseur de disque de
friction:
5MV-9-30-4B 6/19/00 1:44 PM Page 33

4-50
ENGWATER PUMP
EC4G3000
REMOVAL POINTS
EC4G3110
Impeller shaft
1. Remove:
9Impeller 1
9Plain washer 2
9Impeller shaft 3
NOTE:
Hold the impeller shaft on its width across the
flats awith spanners, etc. and remove the im-
peller.
EC4G3210
Oil seal
NOTE:
It is not necessary to disassemble the water
pump, unless there is an abnormality such as
excessive change in coolant level, discoloration
of coolant, or milky transmission oil.
1. Remove:
9Bearing 1
2. Remove:
9Oil seal 1
EC4G4000
INSPECTIONEC444200
Impeller shaft
1. Inspect:
9Impeller shaft 1
Bend/Wear/Damage ÕReplace.
Fur deposits ÕClean.
5MV-9-30-4C 6/19/00 1:42 PM Page 26

5-3
CHAS
ROUE AVANT ET ROUE ARRIERE
VORDERRAD UND HINTERRAD
RUOTA ANTERIORE E RUOTA POSTERIORE
AUSBAUPUNKTE
Hinterrad
1. Ausbauen:
9Rad 1
ANMERKUNG:
Das Rad nach vorne stoßen und die
Antriebskette 2abnehmen.
Radlager (wenn erforderlich)
1. Ausbauen:
9Lager 1
ANMERKUNG:
Das Lager unter Verwendung einer
allgemeinen Lager-Abziehvorrichtung
2ausbauen.
INSPEKTION
Rad
1. Messen:
9Felgenschlag
Außerhalb des GrenzwertesÕ
Reparieren/Erneuern.
2. Prüfen:
9Lager
Den inneren Laufring mit
einem Finger drehen.
Rauhe Stellen/FreßspurenÕ
Erneuern.
ANMERKUNG:
Die Lager, die Öldichtung und die
Radhülse als Satz erneuern.
POINTS DE DEPOSE
Roue arrière
1. Déposer:
9Roue 1
N.B.:
Pousser la roue vers l’avant et déposer
la chaîne de transmission 2.
Roulement de roue (si nécessaire)
1. Déposer:
9Roulement 1
N.B.:
Déposer le roulement en utilisant un
arrache-roulement courant 2.
VERIFICATION
Roue
1. Mesure:
9Voile de roue
Hors limiteÕRéparer/Changer.
2. Examiner:
9Roulement
Faire tourner la bague intérieure
avec le doigt.
Point dur/grippage’Changer.
N.B.:
Changer les roulements, la bague
d’étanchéité et la collerette de roue
comme un ensemble.
IC593000PUNTI DI RIMOZIONE
IC523101
Ruota posteriore
1. Togliere:
9Ruota 1
NOTA:
Spingere in avanti la ruota e togliere la
catena di trasmissione 2.
IC513201
Cuscinetto della ruota (se necessario)
1. Togliere:
9Cuscinetto 1
NOTA:
Togliere il cuscinetto usando un estrat-
tore generico per cuscinetti 2.
IC594000
ISPEZIONE
IC514100
Ruota
1. Misurare:
9Scentratura della ruota
Fuori limiteÕ
Ripararla/Sostituirla.
2. Ispezionare:
9Cuscinetto
Ruotare l’anello interno con un
dito.
Ruvidità/Grippaggio
ÕSostituir-
lo.
NOTA:
Sostituire i cuscinetti, il paraolio e il
bordino della ruota come set.
Limite de voile de la roue:
Radial 1 1
: 2,0 mm
(0,08 in)
Latéral 2 2
: 2,0 mm
(0,08 in)
Limite di scentratura
della ruota:
Radiale 1 1
: 2,0 mm
(0,08 in)
Laterale 2 2
: 2,0 mm
(0,08 in)
Felgen-Verschleißgrenze:Senkrecht 1 1
: 2,0 mm
(0,08 in)
Seitlich 2 2
: 2,0 mm
(0,08 in)
5MV-9-30-5A 6/19/00 1:35 PM Page 7

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 spécificationÕExaminer 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 limiteÕChanger.
Radachse
1. Messen:
9Radachsenbiegung
Abweichung von Spezifikation
ÕErneuern.
Die Meßuhr 1verwenden.
ANMERKUNG:
Der Biegewert entpricht 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 ÕChanger.
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 specificaÕSostituirlo.
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 specificaÕIspezionare 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 limiteÕSostituirlo.
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
ÕSchlag der Felge prüfen.
Falls der Felgenschlag inner-
halb des zulässigen Bereiches
liegt, die Bremsscheibe erneu-
ern.
2. Messen:
9Bremsscheibendicke a
Außerhalb des GrenzwertesÕ
Erneuern.
Radachse-durchbie-
guhgsgrenze:
0,5 mm (0,020 in)
Bremsscheibe-
Verschleißgrenze:
Standard
Vorne3,0 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 normalePosteriore—0,15 mm (0,006 in)
5MV-9-30-5A 6/19/00 1:35 PM Page 9

7-12
TUNSETTING
EC71M001
Change of the heat range of spark plugs
Judging from the discoloration of spark plugs, if
they are found improper, it can be corrected by
the following two methods; changing carburetor
settings and changing the heat range of spark
plug.
9In principle, it is advisable to first use spark
plugs of standard heat range, and judging from
the discoloration of spark plugs, adjust carbure-
tor settings.
9If the calibration No. of the main jet must be
changed by ±30, it is advisable to change the
heat range of spark plugs and newly select the
proper main jet.
NOTE:
9When checking the discoloration of spark
plugs, be sure to stop the engine immediately
after a run and check.
9Avoid racing.
9When changing the heat range of spark plugs,
never attempt to change it more than ±1 rank.
9When using spark plugs other than standard,
make sure of the difference in heat range and
find the equivalent to the standard.
9Note that even if the discoloration seems prop-
er, it may slightly vary with the spark plug
maker and oil in use.
Standard spark plug BR9EG/NGK
5MV-9-30-7A 6/19/00 1:24 PM Page 32

7-15
TUNSETTING
EC722011
Front fork setting
The front fork setting should be made depending
on the rider’s feeling of an actual run and the cir-
cuit conditions.
The front fork setting includes the following three
factors:
1. Setting of air spring characteristics
9Change the fork oil level.
2. Setting of spring preload
9Change the spring.
9Install the adjustment washer.
3. Setting of damping force
9Change the compression damping.
9Change the rebound damping.
The spring acts on the load and the damp-
ing force acts on the cushion travel speed.
EC723001
Change in level and characteristics of fork oil
Damping characteristic near the final stroke can
be changed by changing the fork oil amount.
cC
Adjust the oil level in 5 mm (0.2 in) incre-
ments or decrements. Too low oil level
causes the front fork to produce a noise at
full rebound or the rider to feel some pres-
sure on his hands or body. Alternatively,
too high oil level will develop unexpectedly
early oil lock with the consequent shorter
front fork travel and deteriorated perfor-
mance an characteristics. Therefore, adjust
the front fork within the specified range.
ŒAir spring characteristics in relation to oil level
change
ºLoad
Stroke
1Max. oil level
2Standard oil level
3Min. oil level
Standard oil level:
135 mm (5.31 in)
Extent of adjustment:
80~150 mm (3.15~5.91 in)
From top of outer tube with
inner tube and damper rod fully
compressed without spring.
A
5MV-9-30-7B 6/19/00 1:23 PM Page 6

7-23
TUNSETTING
EC72H010
Suspension setting
9Front fork
NOTE:
9If any of the following symptoms is experienced with the standard position as the base, make reset-
ting by reference to the adjustment procedure given in the same chart.
9Before any change, set the rear shock absorber sunken length to the standard figure 90~100 mm
(3.5~3.9 in).
Section
Symptom
JumpLarge
Medium Small Check Adjust
gap gap gap
Compression damping Turn adjuster counterclockwise (about 2 clicks)
Stiff over entire to decrease damping.
range111Oil level (oil amount) Decrease oil level by about 5~10 mm (0.2~0.4
in).
Spring Replace with soft spring.
Unsmooth Outer tube Check for any bends, dents, and other notice-
movement over 1111Inner tube able scars, etc. If any, replace affected parts.
entire range
Under bracket tightening Retighten to specified torque.
torque
Poor initial Rebound damping Turn adjuster counterclockwise (about 2 clicks)
movement1to decrease damping.
Oil seal Apply grease in oil seal wall.
Compression damping Turn adjuster clockwise (about 2 clicks) to in-
Soft over entire crease damping.
range, bottoming 11Oil level (oil amount) Increase oil level by about 5~10 mm (0.2~0.4
outin).
Spring Replace with stiff spring.
Stiff toward stroke
1Oil level (oil amount) Decrease oil level by about 5 mm (0.2 in).
end
Soft toward stroke
1Oil level (oil amount) Increase oil level by about 5 mm (0.2 in).
end, bottoming out
Stiff initial
1111Compression dampingTurn adjuster counterclockwise (about 2 clicks)
movement to decrease damping.
Compression damping Turn adjuster clockwise (about 2 clicks) to in-
crease damping.
Low front, tending Rebound damping Turn adjuster counterclockwise (about 2 clicks)
to lower front 11to decrease damping.
postureBalance with rear end Set sunken length for 95~100 mm (3.7~3.9 in)
when one passenger is astride seat (lower rear
posture).
Oil level (oil amount) Increase oil level by about 5 mm (0.2 in).
Compression damping Turn adjuster counterclockwise (about 2 clicks)
to decrease damping.
“Obtrusive” front, Balance with rear end Set sunken length for 90~95 mm (3.5~3.7 in)
tending to upper 11when one passenger is astride seat (upper rear
front postureposture).
Spring Replace with soft spring.
Oil lever (oil amount) Decrease oil level by about 5~10 mm (0.2~0.4
in).
5MV-9-30-7B 6/19/00 1:23 PM Page 22