2006 YAMAHA YZ450F engine

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Page 581 of 650

YAMAHA YZ450F 2006  Owners Manual –+ELEC
6 - 3
IGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system failure

Page 582 of 650

YAMAHA YZ450F 2006  Owners Manual –+ELECSYSTEME D’ALLUMAGE
SYSTEME D’ALLUMAGE
ETAPES DU CONTROLE
Suivre la procédure ci-dessous pour déterminer si le mauvais fonctionnement du moteur est dû à une panne
dans le circuit d’al

Page 583 of 650

YAMAHA YZ450F 2006  Owners Manual –+ELEC
ZÜNDSYSTEM
KONTROLLE
Folgende Prüfschritte dienen zur Diagnose von zündungsbedingten Motorstörungen und von Zünd-
kerzenausfall.
* Nur mit dem Zündungstester kontrollieren.
HINWEIS:
Vo

Page 584 of 650

YAMAHA YZ450F 2006  Owners Manual 6 - 4
–+ELECIGNITION SYSTEM
SPARK GAP TEST
1. Disconnect the ignition coil from spark
plug.
2. Remove the ignition coil cap.
3. Connect the dynamic spark tester 1 (igni-
tion checker 2) as shown.

Page 585 of 650

YAMAHA YZ450F 2006  Owners Manual –+ELEC
ZÜNDFUNKENSTRECKE KONTROLLIEREN
1. Das Zündkabel von der Zündkerze abziehen.
2. Den Stecker von der Zündspule abziehen.
3. Den Zündfunkenstrecken-Tester 1 (Zün-
dungstester 2), wie in d

Page 594 of 650

YAMAHA YZ450F 2006  Owners Manual 6 - 8
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
HANDLING NOTE
CAUTION:
Do not loosen the screws {TPS (throttle
position sensor)} 
1 except when changing
the TPS (throttle position sensor) due to
f

Page 598 of 650

YAMAHA YZ450F 2006  Owners Manual 6 - 10
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
6. Adjust:
•Idle speed
Refer to “IDLE SPEED ADJUSTMENT”
section in the CHAPTER 3.
7. Insert the thin electric conductors 2 (lead)
into the TP

Page 600 of 650

YAMAHA YZ450F 2006  Owners Manual 6 - 11
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
10. Put the aligning marks a on the TPS and
carburetor.
11. Stop the engine.
12. Remove the carburetor.
a
13. Tighten:
•Screw (TPS) 1 
NOTE:
Tigh