2003 YAMAHA YZ450F ESP

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Page 560 of 644

YAMAHA YZ450F 2003  Owners Manual 5 - 60
CHAS
EC586000
HANDLING NOTE
WARNING
This shock absorber is provided with a
separate type tank filled with high-pressure
nitrogen gas. To prevent the danger of
explosion, read and understand the

Page 561 of 644

YAMAHA YZ450F 2003  Owners Manual 5 - 60
CHAS
HINWEIS ZUM UMGANG MIT DEM 
STOSSDÄMPFER
WARNUNG
Der Stoßdämpfer enthält Stickstoff unter ho-
hem Druck. Vor Arbeiten am Stoßdämpfer die
folgenden Erläuterungen sorgfältig durchle-

Page 572 of 644

YAMAHA YZ450F 2003  Owners Manual –+ELEC
 
6 - 2 
MAP-CONTROLLED CDI UNIT
MAP-CONTROLLED CDI UNIT 
A map-controlled, CDI ignition system is used in the YZ450F.
The microcomputer in the CDI unit detects the engine speed and throttle

Page 596 of 644

YAMAHA YZ450F 2003  Owners Manual  
7 - 1
TUN
 
EC700000 
TUNING 
EC710000 
ENGINE 
Carburetor setting 
 
The air/fuel mixture will vary depending on
atmospheric conditions. Therefore, it is nec-
essary to take into consideration the

Page 597 of 644

YAMAHA YZ450F 2003  Owners Manual TUN
 
ABSTIMMUNG 
MOTOR 
Vergaser einstellen 
 
Das Luft/Kraftstoffgemisch variiert mit den
atmosphärischen Bedingungen. Daher muß
die Einstellung des Vergasers in Abhängig-
keit von Luftdruck, Fe

Page 612 of 644

YAMAHA YZ450F 2003  Owners Manual 7 - 9
TUN
Examples of carburetor setting depending on symptom
This should be taken simply for an example. It is necessary to set the carburetor while checking
the operating conditions of the engine.
S

Page 626 of 644

YAMAHA YZ450F 2003  Owners Manual 7 - 15
TUN
EC72P000
Front fork setting parts
Adjustment washer 1 
Front fork spring 2 
[Equal pitch spring]
[Unequal pitch spring]
NOTE:
The unequal pitch spring is softer in initial
characteristic

Page 634 of 644

YAMAHA YZ450F 2003  Owners Manual 7 - 19
TUNSETTING
EC72Q000
Rear shock absorber setting parts
Rear shock spring 1 
[Equal pitch spring]
[Unequal pitch spring]
*For EUROPE
NOTE:
The unequal pitch spring is softer in initial
characte
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