engine YAMAHA YZ450F 2004 Owners Manual

5 - 1
CHAS

EC500000
CHASSIS
EC590000
FRONT WHEEL AND REAR WHEEL
EC598000
FRONT WHEEL
FRONT WHEEL AND REAR WHEEL
Extent of removal:
1
Front wheel removal
2
Wheel bearing removal
3
Brake disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
FRONT WHEEL REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING

Support the machine securely so there is no
danger of it falling over.
1 Hose cover 1
2 Bolt (brake hose holder) 2 Only loosening.
3 Bolt (axle holder) 4 Only loosening.
4 Nut (front wheel axle) 1
5 Front wheel axle 1
6 Front wheel 1
7 Collar 2
8 Oil seal 2
9 Bearing 2 Refer to “REMOVAL POINTS”.
10Brake disc
1
2
31
3

5 - 2
CHAS

EC598100
REAR WHEEL
Extent of removal:
1
Rear wheel removal
2
Wheel bearing removal
3
Brake disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
REAR WHEEL REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING

Support the machine securely so there is no
danger of it falling over.
1 Nut (rear wheel axle) 1
2 Rear wheel axle 1
3 Chain puller 2
4 Rear wheel 1 Refer to “REMOVAL POINTS”.
5 Collar 2
6 Driven sprocket 1
7 Oil seal 2
8 Circlip 1
9 Bearing 2 Refer to “REMOVAL POINTS”.
10Brake disc
1
2
31
3

FRONT WHEEL AND REAR WHEEL

5 - 10
CHASFRONT BRAKE AND REAR BRAKE
EC5A0000
FRONT BRAKE AND REAR BRAKE
EC5A8000
FRONT BRAKE
Extent of removal:1 Brake hose removal2 Caliper removal
3 Master cylinder removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT BRAKE REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is nodanger of it falling over.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Hose cover 1
2 Brake hose holder 1
3 Bolt (brake hose holder) 2 Only loosening.
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the caliper.
8 Caliper 1
9 Brake lever 1
10 Master cylinder bracket 1
11 Master cylinder 1
2
3
1
3
2

5 - 11
CHAS
EC5A8100
REAR BRAKE
Extent of removal:1 Master cylinder removal2 Brake hose removal
3 Caliper removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR BRAKE REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is nodanger of it falling over.
Rear wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Brake pedal 1
2 Master cylinder 1
3 Brake hose holder 2
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the caliper.
8Caliper
1
3
1
321
FRONT BRAKE AND REAR BRAKE

5 - 26
CHASFRONT FORK
EC550000
FRONT FORK
Extent of removal:1 Front fork removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT FORK REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is nodanger of it falling over.
Front wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Front caliper Refer to “FRONT BRAKE AND REAR
BRAKE” section.
Number plate
Handlebar Refer to “HANDLEBAR” section.
1 Protector 1
2 Brake hose holder 2
3 Pinch bolt (handle crown) 2 Only loosening.
4 Cap bolt 1Loosen when disassembling the front fork.
5 Pinch bolt (under bracket) 2 Only loosening.
6 Front fork 1
1

5 - 39
CHAS
EC5B0000
HANDLEBAR
Extent of removal:1 Handlebar removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalHANDLEBAR REMOVAL
Number plate Remove the clamp portion only.
1 Hot starter cable 1 Disconnect at the lever side.
2 Hot starter lever holder 1
3 Clutch cable 1 Disconnect at the lever side.
4 Clutch lever holder 1
5“ENGINE STOP” button 1
6 Master cylinder 1 Refer to “REMOVAL POINTS”.
7 Throttle cable cap 1
8 Throttle cable #2 (pushed) 1 Disconnect at the throttle side.
9 Throttle cable #1 (pulled) 1 Disconnect at the throttle side.
10 Grip (right) 1 Refer to “REMOVAL POINTS”.
11 Tube guide 1
12 Cover (grip cap) 1
13 Collar 1
14 Grip (left) 1 Refer to “REMOVAL POINTS”.
15 Handlebar holder (upper) 2
16 Handlebar 1
1
HANDLEBAR

5 - 39
CHAS
LENKER
Demontage-Arbeiten:1 Lenker demontieren
Demontage-ArbeitenReihen-
folgeBauteilAnz.Bemerkungen
Vorbereitung den Aus-
bauLENKER DEMONTIEREN
Nummernschild Nur die Befestigung demontieren.
1 Heißstarterseilzug 1 Hebelseitig demontieren.
2 Heißstarter-Hebelhalter 1
3 Kupplungszug 1 Hebelseitig demontieren.
4 Kupplungshebel-Halterung 1
5 Motorstoppschalter “ENGINE
STOP”1
6 Hauptbremszylinder 1 Siehe unter “AUSBAU”.
7 Gasseilzugkappe 1
8 Gaszug 2 1 Gasdrehgriffseitig demontieren.
9 Gaszug 1 1 Gasdrehgriffseitig demontieren.
10 Gasdrehgriff 1 Siehe unter “AUSBAU”.
11 Führungsrohr 1
12 Abdeckung (Griffkappe) 1
13 Hülse 1
14 Lenkergriff (links) 1 Siehe unter “AUSBAU”.
15 Lenkerhalterung (oben) 2
16 Lenker 1
1
GUIDON
LENKER
GUIDON
Organisation de la dépose:1 Dépose du guidon
Organisation de la dépose Ordre Nom de pièce QtéRemarques
Préparation pour la
déposeDEPOSE DU GUIDON
Plaque de numéro Enlever seulement la partie fixée au guidon.
1Câble de démarreur à chaud 1 Déconnecter du côté levier.
2 Support du levier de démarreur à
chaud 1
3Câble d’embrayage 1 Déconnecter du côté levier.
4 Support de levier d’embrayage 1
5 Bouton d’arrêt du moteur “ENGINE
STOP”1
6Maître-cylindre 1 Se reporter à “POINTS DE DEPOSE”.
7 Capuchon de câble d’accélérateur 1
8Câble d’accélérateur 2 (serré)1Déconnecter du côté accélérateur.
9Câble d’accélérateur 1 (tiré)1Déconnecter du côté accélérateur.
10 Poignée (droite) 1 Se reporter à “POINTS DE DEPOSE”.
11 Guide de tube 1
12 Cache (capuchon de la poignée des gaz) 1
13 Collerette 1
14 Poignée (gauche) 1 Se reporter à “POINTS DE DEPOSE”.
15 Support de guidon (supérieur) 2
16 Guidon 1
1

5 - 43
CHASHANDLEBAR
8. Install:
Master cylinder 1
Master cylinder bracket 2
Bolt (master cylinder bracket) 3
NOTE:
Install the bracket so that the arrow mark a
faces upward.
First tighten the bolt on the upper side of the
master cylinder bracket, and then tighten the
bolt on the lower side.
9. Install:
“ENGINE STOP” button 1
Clutch lever holder 2
Bolt (clutch lever holder) 3
Hot starter lever holder 4
Bolt (hot starter lever holder) 5
Clamp 6
NOTE:
The “ENGINE STOP” button, clutch lever
holder and clamp should be installed accord-
ing to the dimensions shown.
Pass the “ENGINE STOP” button lead in the
middle of the clutch lever holder.
T R..9 Nm (0.9 m · kg, 6.5 ft · lb)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
10. Install:
Clutch cable 1
Hot starter cable 2
NOTE:
Apply the lithium soap base grease on the
clutch cable end and hot starter cable end.
11. Adjust:
Clutch lever free play
Refer to “CLUTCH ADJUSTMENT”
section in the CHAPTER 3.
Hot starter lever free play
Refer to “HOT STARTER LEVER
ADJUSTMENT” section in the CHAP-
TER 3.

5 - 43
CHAS
GUIDON
LENKER
8. Montieren:
Hauptbremszylinder 1
Hauptbremszylinder-Halterung 2
Schraube (Hauptbremszylinder-Halte-
rung) 3
HINWEIS:
Die Halterung mit nach oben gerichteter
Pfeilmarkierung a einbauen.
Zuerst die oberen, dann die unteren Halte-
rungsschrauben festziehen.
9. Montieren:
Motorstoppschalter “ENGINE STOP” 1
Kupplungshebel-Halterung 2
Schraube (Halterung) 3
Heißstarter-Hebelhalter 4
Schraube (Heißstarter-Hebelhalter) 5
Kabelbinder 6
HINWEIS:
Motorstoppschalter, Kupplungshebel-Halte-
rung und Kabelbinder gemäß den in der Ab-
bildung gezeigten Abmessungen montieren.
Das Motorstoppschalter-Kabel mittig durch
die Kupplungshebel-Halterung führen.
10. Montieren:
Kupplungszug 1
Heißstarterseilzug 2
HINWEIS:
Lithiumfett auf die Enden des Kupplungsseil-
zugs und warmstart-Seilzugs auftragen.
11. Einstellen:
Kupplungszugspiel
Siehe unter “KUPPLUNG EINSTEL-
LEN” im KAPITEL 3.
Spiel des Heißstarter-Hebels
Siehe unter “WARMSTART-HEBEL-
EINSTELLUNG” im KAPITEL 3.
T R..9 Nm (0,9 m · kg, 6,5 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
8. Monter:
Maître-cylindre 1
Demi-palier de fixation de maître-cylindre 2
Boulon (demi-palier de fixation) 3
N.B.:
Reposer la support pour que la flèche a soit diri-
gée vers le haut.
Serrer d’abord le boulon sur le côté supérieur du
demi-palier de fixation de maître-cylindre, puis
serrer le boulon sur le côté inférieur.
9. Monter:
Bouton d’arrêt du moteur “ENGINE
STOP” 1
Support de levier d’embrayage 2
Boulon (support de levier d’embrayage) 3
Support du levier de démarreur à chaud 4
Boulon (support du levier de démarreur à
chaud) 5
Bride 6
N.B.:
Le bouton d’arrêt du moteur “ENGINE STOP”,
le support de levier d’embrayage et l’attache en
plastique doivent être installés en respectant les
dimensions indiquées.
Faire passer le fil de bouton d’arrêt du moteur
“ENGINE STOP” au centre du support de levier
d’embrayage.
10. Monter:
Câble d’embrayage 1
Câble de démarreur à chaud 2
N.B.:
Enduire de graisse à base de savon au lithium
l’extrémité du câble d’embrayage et l’extrémité du
câble de démarrage à chaud.
11. Régler:
Jeu du levier d’embrayage
Se reporter à la section “REGLAGE DE
L’EMBRAYAGE” du CHAPITRE 3.
Jeu du levier de démarreur à chaud
Se reporter à la section “REGLAGE DU
LEVIER DE DEMARREUR A CHAUD”
du CHAPITRE 3.
T R..9 Nm (0,9 m · kg, 6,5 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)

5 - 45
CHAS
EC560000
STEERING
Extent of removal:1 Under bracket removal2 Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
WARNINGSupport the machine securely so there is nodanger of it falling over.Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Number plate
Handlebar Refer to “HANDLEBAR” section.
Front fender
1 Steering shaft cap 1
2 Steering shaft nut 1
3 Front fork 2 Refer to “FRONT FORK” section.
4 Handle crown 1
5 Ring nut 1 Use special tool.
Refer to “REMOVAL POINTS”.
6 Under bracket 1
7 Ball race cover 1
8 Bearing (upper) 1
9 Bearing (lower) 1
Refer to “REMOVAL POINTS”.
10 Ball race 2
2
1
STEERING