2006 YAMAHA TTR90 engine

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Page 340 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) 6 - 2
–+ELEC
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F
EC
D
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
TT-R90E
EC611000
ELECTRICAL COMPONENTS
1Main switch
2“ENGINE STOP” 
switch
3Thermo switch
4Ignition coil
5CDI uni

Page 341 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) –+ELEC
TT-R90E
ELEKTRISCHE BAUTEILE
1Zündschloss
2Motorstoppschalter“ENGINE STOP”
3Thermoschalter
4Zündspule
5Zündbox
6Batterie
7Gleichrichter/Regler
8Leerlaufschalter
9Lichtmaschine
0Vergase

Page 342 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) –+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 344 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) –+ELEC
ZÜNDSYSTEM
KONTROLLE
Folgende Prüfschritte dienen zur Diagnose von zündungsbedingten Motorstörungen und von Zünd-
kerzenausfall.
HINWEIS:
Vor der Kontrolle folgende Bauteile demontieren

Page 346 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) 6 - 4
–+ELECIGNITION SYSTEM
EC622001
SPARK GAP TEST
1. Disconnect the spark plug cap from spark
plug.
2. Connect the dynamic spark tester 1 (igni-
tion checker 2) as shown.
Spark plug cap 3 
Spark

Page 348 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) 6 - 5
–+ELECIGNITION SYSTEM
“ENGINE STOP” SWITCH INSPECTION
1. Inspect:
“ENGINE STOP” switch continuity
Not continuous in the “” position → Replace.
Continuous in the “” position

Page 349 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) –+ELEC
MOTORSTOPPSCHALTER “ENGINE STOP” 
KONTROLLIEREN
1. Kontrollieren:
Durchgang des Motorstoppschalters
“ENGINE STOP”
Kein Durchgang in Schalterstellung “” → 
Erneuern.
Durchgang i

Page 352 of 390

YAMAHA TTR90 2006  Notices Demploi (in French) 6 - 7
–+ELEC
ELECTRIC STARTING SYSTEM 
(TT-R90E)
STARTING CIRCUIT CUT-OFF SYSTEM 
OPERATION
If the main switch is set to “ON”, the starter
motor can only operate if the following condi-
tion is