2001 YAMAHA YZ250LC ABS

5-59
CHASREAR SHOCK ABSORBER
EC580000
REAR SHOCK ABSORBER
Extent of removal Order Part name Q’ty Remarks
REAR SHOCK ABSORBER
REMOVAL
Preparation forHold the machine by placing the
removalsuitable stand under the engine.
SeatRefer to “SEAT, FUEL TANK AND
SIDE COVERS” section.
SilencerRefer to “EXHAUST PIPE AND
SILENCER” section.
1 Clamp (air cleaner joint) 1 Loosen the screw (air cleaner joint).
2 Rear frame 1
3
Bolt (rear shock absorber-relay arm)1 Hold the swingarm.
4 Bolt (rear shock absorber-frame) 1
5 Rear shock absorber 1
6 Locknut 1
7 Adjuster 1
8 Spring guide (lower) 1
9 Spring guide (upper) 1
10 Spring (rear shock absorber) 1
11 Bearing 2 Refer to “REMOVAL POINTS”.
2
w
Support the machine securely so there is no dan-
ger of it falling over.
Extent of removal:1Rear shock absorber removal 2Rear shock absorber disassembly
1
56 Nm (5.6 m•kg, 40 ft•lb)
53 Nm (5.3 m•kg, 38 ft•lb)
29 Nm (2.9 m•kg, 21 ft•lb)
5MW-9-30-5D 7/6/00 11:30 AM Page 16

5-59
CHAS
AMORTISSEUR ARRIERE
HINTERRAD-STOSSDÄMPFER
AMMORTIZZATORE POSTERIORE
.AusbauumfangReihen-
TeilenameStück-
Bemerkungen
folgezahl
AUSBAU DES HINTERRAD-STOS-
SDÄMPFERS
Die Maschine halten, indem ein geeigne-
ter Ständer unter dem Motor angeordnet
wird.
Sitz Siehe Abschnitt „SITZ, KRAFTSTOFFTANK UND
SEITENDECKEL“.
Schalldämpfer Siehe Abschnitt „AUSPUFFROHR UND
SCHALLDÄMPFER“.
1 Klemme (Luftfilterverbindung) 1Die Schraube (Luftfilterverbindung) lösen.
2 Hintere Rahmen 1
3 Schraube (Hinterrad-Stoßdämpfer 1 Die Hinterradschwinge festhalten.
—Relaisarm)
4 Schraube (Hinterrad-Stoßdämpfer 1
—Rahmen)
5 Hinterrad-Stoßdämpfer 1
6 Sicherungsmutter 1
7 Einsteller 1
8 Federführung (Unten) 1
9 Federführung (Oben) 1
10 Feder (Hinterrad-Stoßdämpfer) 1
11 Lager 2 Siehe unter „AUSBAUPUNKTE“.
HINTERRAD-STOSSDÄMPFER
Ausbauumfang:1Ausbau des Hinterrad-Stoßdämpfers 2Demontage des Hinterrad-Stoßdämpfers
AMORTISSEUR ARRIERE
Etendue de dépose:1Dépose de l’amortisseur arrière 2Démontage de l’amortisseur arrière
Etendue de dépose Ordre Nom de pièce Q’té Remarques
DEPOSE DE L’AMORTISSEUR
ARRIERE
Maintenir la machine en plaçant un support
approprié sous le moteur.
Selle Se reporter à la section “SELLE, RESERVOIR A
ESSENCE ET COUVERCLES LATERAUX”.
Silencieux Se reporter à la section “TUYAU D’ECHAPPE-
MENT ET SILENCIEUX”.
1 Bride (raccord de filtre à air) 1 Desserrer la vis (raccord de filtre à air).
2 Cadre arrière 1
3 Boulon (amortisseur arrière—bras de relais) 1 Tenir le bras oscillant.
4 Boulon (amortisseur arrière—cadre) 1
5 Amortisseur arrière 1
6 Contre-écrou 1
7 Dispositif de réglage 1
8 Guide de ressort (inférieur) 1
9 Guide de ressort (supérieur) 1
10 Ressort (amortisseur arrière) 1
11 Roulement 2 Se reporter à “POINTS DE DEPOSE”.
Préparation
pour la dépose
XGBien soutenir la machine afin qu’elle ne risque pas
de se renverser.
EC580000
AMMORTIZZATORE POSTERIORE
Ampiezza della rimozione:1Rimozione dell’ammortizzatore posteriore2Smontaggio dell’ammortizzatore posteriore
Ampiezza della rimozione Ordine Particolare Quantità Osservazione
RIMOZIONE DELL’AMMORTIZZA-
TORE POSTERIORE
Reggere il veicolo collocando sotto il mo-
toree l’apposito supporto.
Sella Consultare la sezione “SELLA, SERBATOIO DEL
CARBURANTE E COPERTURA LATERALI”.
Silenziatore Consultare la sezione “TUBO DI SCARICO E SI-
LENZIATORE”.
1
Brida (giunto del filtro dell’aria)1Allentare la vite (giunto del filtro dell’aria).
2Telaio posteriore1
3Bullone (ammortizzatore posteriore—1Reggere il forcellone oscillante.
braccio di rinvio)
4Bullone (ammortizzatore posteriore—1telaio)5Ammortizzatore posteriore1
6Controdado1
7 Regolatore 1
8
Guida della molla (inferiore)1
9Guida della molla (superiore)1
10Molla (ammortizzatore posteriore)1
11Cuscinetto2Consultare “PUNTI DI RIMOZIONE”.
Preparazioneper
la rimozione
TSostenere saldamente il veicolo, in modo che non vi sia
il pericolo che si ribalti.
WDie Maschine richtig abstützen, damit es nicht
umfallen kann.Vorbereitung für den
Ausbau
1
2
1
2
1
2
5MW-9-30-5D 7/6/00 11:30 AM Page 17

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.
5MW-9-30-5D 7/6/00 11:30 AM Page 18

5-61
CHASREAR SHOCK ABSORBER
EC583000
REMOVAL POINTS
EC583320
Bearing
1. Remove:
9Stopper ring (upper bearing) 1
NOTE:
Press in the bearing while pressing its outer race
and remove the stopper ring.
2. Remove:
9Upper bearing 1
NOTE:
Remove the bearing by pressing its outer race.
EC584000
INSPECTION
EC584110
Rear shock absorber
1. Inspect:
9Damper rod 1
Bends/Damage ÕReplace absorber
assembly.
9Shock absorber 2
Oil leaks ÕReplace absorber assembly.
Gas leaks ÕReplace absorber assembly.
9Spring 3
Damage ÕReplace spring.
Fatigue ÕReplace spring.
Move spring up and down.
9Spring guide 4
Wear/Damage ÕReplace spring guide.
9Bearing 5
Free play exists/Unsmooth revolution/
Rust ÕReplace. 3. Remove:
9Lower bearing 1
NOTE:
Remove the bearing by pressing its outer race.
5MW-9-30-5D 7/6/00 11:31 AM Page 20

5-62
CHASREAR SHOCK ABSORBER
EC585111
Spring (rear shock absorber)
1. Install:
9Spring 1
9Spring guide (upper) 2
9Spring guide (lower) 3
2. Tighten:
9Adjuster 1
EC585000
ASSEMBLY AND INSTALLATION
EC585320
Bearing
1. Install:
9Upper Bearing 1
NOTE:
Install the bearing parallel until the stopper ring
groove appears by pressing its outer race.
cC
Do not apply the grease on the bearing
outer race because it will wear the rear
shock absorber surface on which the bear-
ing is press fitted.
2. Install:
9Stopper ring (upper bearing) 1
NOTE:
After installing the stopper ring, push back the
bearing until it contacts the stopper ring.
3. Install:
9Lower bearing 1
NOTE:
Install the bearing by pressing it on the side hav-
ing the manufacture’s marks or numbers.
Installed depth of the bearing a a
:
4 mm (0.16 in)
5MW-9-30-5D 7/6/00 11:31 AM Page 22

5-63
CHASREAR SHOCK ABSORBER
EC5852B3
Rear shock absorber
1. Install:
9Dust seal 1
9O-ring 2
9Collar 3
NOTE:
9Apply the molybdenum disulfide grease on the
bearing.
9Apply the lithium soap base grease on the dust
seals, O-rings and collars.
2. Install:
9Bush 1
9Collar 2
9Dust seal 3
NOTE:
9Apply the molybdenum disulfide grease on the
bearing.
9Apply the lithium soap base grease on the
bush, collars and dust seals.
9Install the dust seals with their lips facing out-
ward.
3. Adjust:
9Spring length (installed) a
*For EUROPE
NOTE:
The length of the spring (installed) changes 1.5
mm (0.06 in) per turn of the adjuster.
cC
Never attempt to turn the adjuster beyond
the maximum or minimum setting.
4. Tighten:
9Locknut 1
Spring length (installed) a
a
:
Standard
length
244 mm (9.61 in)
*267 mm (10.51 in)Extent of
adjustment
242~260 mm
(9.53~10.24 in)
*257~275 mm
(10.12~10.83 in)
5MW-9-30-5D 7/6/00 11:32 AM Page 24

5-64
CHASREAR SHOCK ABSORBER
3. Install:
9Rear shock absorber
4. Install:
9Bolt (rear shock absorber-frame) 1
9Nut (rear shock absorber-frame) 2
NOTE:
Apply the molybdenum disulfide grease on the
bolt.
5. Install:
9Plain washer 1
9Bolt (rear shock absorber-relay arm) 2
NOTE:
9Apply the molybdenum disulfide grease on
the bolt.
9Insert the bolt from right side.
6. Install:
9Rear frame 1
9Bolt (rear frame) 2
7. Tighten:
9Screw (air cleaner joint) 1
56 Nm (5.6 m•kg, 40 ft•lb)
53 Nm (5.3 m•kg, 38 ft•lb)
29 Nm (2.9 m•kg, 21 ft•lb)
5MW-9-30-5D 7/6/00 11:33 AM Page 26

6-6
MAGNETVENTILSYSTEMELEC
Betriebsablauf des
Magnetventils prüfen.
Magnetventilspule
Nicht in Ordnung
Nicht in Ordnung
Nicht in Ordnung
Alle Stecker - und Kabelverbin-
dungen überprüfen.
Magnetventil überprüfen.
Erneuern oder
reparieren.
Erneuern.
Erneuern.
In Ordnung
In Ordnung
In OrdnungStromspule
Erneuern.*CDI-Magnetzünder
kontrollieren.
CDI-Einbeit erneuern.
Nicht in Ordnung
MAGNETVENTILSYSTEM
PRÜFVORGÄNGE
Falls das Magnetventil nicht funktioniert, sind die folgenden Überprüfungen durchzuführen.
Markierung*: Siehe Abschnitt „ZÜNDANLAGE“.
ANMERKUNG:
9Die folgenden Teile vor Beginn der Störungsbeseitigung ausbauen.
1) Sitz
2) Kraftstofftank
912V-Batterie für diese Überprüfung benutzen.
9Die folgenden Spezialwerkzeuge für die Störungsbeseitigung verwenden.
Taschenprüfgerät:
YU-3112-C/90890-03112
5MW-9-30-6 7/6/00 1:37 PM Page 16