2004 YAMAHA YZ450F ECO mode

EC020000
INTRODUCTION
Congratulations on your purchase of a
Yamaha YZ series. This model is the culmina-
tion of Yamaha’s vast experience in the pro-
duction of pacesetting racing machines. It
represents the highest grade of craftsmanship
and reliability that have made Yamaha a
leader.
This manual explains operation, inspection,
basic maintenance and tuning of your
machine. If you have any questions about this
manual or your machine, please contact your
Yamaha dealer.
NOTE:

As improvements are made on this model,
some data in this manual may become out-
dated. If you have any questions, please con-
sult your Yamaha dealer.
WARNING

PLEASE READ THIS MANUAL CAREFULLY
AND COMPLETELY BEFORE OPERATING
THIS MACHINE. DO NOT ATTEMPT TO
OPERATE THIS MACHINE UNTIL YOU
HAVE ATTAINED A SATISFACTORY
KNOWLEDGE OF ITS CONTROLS AND
OPERATING FEATURES AND UNTIL YOU
HAVE BEEN TRAINED IN SAFE AND
PROPER RIDING TECHNIQUES. REGULAR
INSPECTIONS AND CAREFUL MAINTE-
NANCE, ALONG WITH GOOD RIDING
SKILLS, WILL ENSURE THAT YOU SAFETY
ENJOY THE CAPABILITIES AND THE RELI-
ABILITY OF THIS MACHINE.

EC050000
TO THE NEW OWNER
This manual will provide you with a good basic
understanding of features, operation, and
basic maintenance and inspection items of this
machine. Please read this manual carefully
and completely before operating your new
machine. If you have any questions regarding
the operation or maintenance of your machine,
please consult your Yamaha dealer.
NOTE:

This manual should be considered a perma-
nent part of this machine and should remain
with it even if the machine is subsequently
sold.
EC060000
NOTICE
Some data in this manual may become out-
dated due to improvements made to this
model in the future. If there is any question
you have regarding this manual or your
machine, please consult your Yamaha
dealer.
EC070001
F.I.M. MACHINE WEIGHTS:
Weights of machines without fuel
The minimum weights for motocross
machines are:
for the class 125 cc....................... minimum
88 kg (194 lb)
for the class 250 cc....................... minimum
98 kg (216 lb)
for the class 500 cc....................... minimum
102 kg (225 lb)
In modifying your machine (e.g., for weight
reduction), take note of the above limits of
weight.

SPEC
2 - 17
MAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Item Standard Limit
Ignition system:
Advancer type Electrical ----
C.D.I.:
Magneto-model (stator)/manufacturer 5SF-00/YAMAHA ----
Source coil 1 resistance (color) 720 ~ 1,080 Ω at 20 ˚C (68 ˚F)
(Green – Brown)----
Source coil 2 resistance (color) 44 ~ 66 Ω at 20 ˚C (68 ˚F)
(Black – Pink)----
Pickup coil resistance (color) 248 ~ 372 Ω at 20 ˚C (68 ˚F)
(White – Red)----
CDI unit-model/manufacturer 5XD-00/YAMAHA (For USA)
5XD-10/YAMAHA (Except for USA)----
----
Ignition coil:
Model/manufacturer 5TA-10/DENSO ----
Minimum spark gap 6 mm (0.24 in) ----
Primary winding resistance 0.08 ~ 0.10 Ω at 20 ˚C (68 ˚F) ----
Secondary winding resistance 4.6 ~ 6.8 kΩ at 20 ˚C (68 ˚F) ----
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Stator M6 × 1.0 3 10 1.0 7.2
Rotor M12 × 1.25 1 56 5.6 40
Neutral switch M5 × 0.8 2 4 0.4 2.9

2 - 1
CARACTERISTIQUES GENERALESSPEC
CARACTERISTIQUES
CARACTERISTIQUES GENERALES
Nom de modèle: YZ450FS (E.-U.)
YZ450F (Europe)
YZ450F(S) (Canada, AUS, NZ, ZA)
Numéro de code de modèle: 5XD1 (E.-U.)
5XD2 (Europe)
5XD4 (Canada, AUS, NZ, ZA)
Dimensions:
Longueur hors-tout 2.171 mm (85,5 in)
Largeur hors-tout 827 mm (32,6 in)
Hauteur hors-tout 1.303 mm (51,3 in)
Hauteur de la selle 995 mm (39,2 in)
Empattement 1.485 mm (58,5 in)
Garde au sol minimale 371 mm (14,6 in)
Poids à sec:
Sans huile ni carburant 100,0 kg (220 lb)
Moteur:
Type de moteur 4 temps, refroidissement liquide, double arbre à
cames en tête (DOHC)
Dispositions de cylindres Monocylindre, incliné
Cylindrée 449 cm
3 (15,8 Imp oz, 15,2 US oz)
Alésage × course 95,0 × 63,4 mm (3,74 × 2,50 in)
Taux de compression 12,5 : 1
Système de démarrage Démarreur au pied
Système de graissage: Carter sec
Type ou grade d’huile:
Huile de moteur (Pour les E.-U. et le Canada)
Huile recommandée:
Min. 5 ˚C (40 ˚F) Å: Yamalube 4 (20W-40) ou
SAE 20W-40 de type SG (Sans additits anti-friction)
Max. 15 ˚C (60 ˚F) ı: Yamalube 4 (10W-30) ou
SAE 10W-30 de type SG (Sans additits anti-friction)
ou Yamalube 4-R (15W-50) (Sans additits anti-fric-
tion)
(Excepté pour les E.-U. et le Canada)
Qualité API “SG” ou supérieure
(Huile pour motocyclettes)
-20
-4-10
140
3010
5020
6830
8640 50
104
122°CTemp.
°F
10W-30
10W-40
20W-40
20W-50
15W-40

2 - 17
CARACTERISTIQUES D’ENTRETIENSPEC
PARTIE ELECTRIQUE
Article Standard Limite
Système d’allumage:
Type de dispositif d’avance Electrique ----
CDI:
Modèle/fabricant de la magnéto (stator) 5SF-00/YAMAHA ----
Résistance de bobine de source 1
(couleur)720 à 1.080 Ω à 20 ˚C (68 ˚F)
(vert – brun)----
Résistance de bobines de source 2
(couleur)44 à 66 Ω à 20 ˚C (68 ˚F)
(noir – rose)----
Résistance de bobine d’excitation
(couleur)248 à 372 Ω à 20 ˚C (68 ˚F)
(blanc – rouge)----
Modèle/fabricant du bloc CDI 5XD-00/YAMAHA
(Pour E.-U.)
5XD-10/YAMAHA
(Excepté pour E.-U.)----
----
Bobine d’allumage:
Modèle/fabricant 5TA-10/DENSO ----
Longueur minimum d’étincelle 6 mm (0,24 in) ----
Résistance de l’enroulement primaire 0,08 à 0,10 Ω à 20 ˚C (68 ˚F) ----
Résistance de l’enroulement secondaire 4,6 à 6,8 kΩ à 20 ˚C (68 ˚F) ----
Pièce à serrerTaille de
filetageQtéCouple de serrage
Nm m·kg ft·lb
Stator M6 × 1,0 3 10 1,0 7,2
Rotor M12 × 1,25 1 56 5,6 40
Bobine d’allumage M5 × 0,8 2 4 0,4 2,9