Yamaha TT-R90(T) - Page 322

6 - 5
– +
ELEC
IGNITION SYSTEM
“ENGINE STOP” SWITCH INSPECTION
1. Inspect:
● “ENGINE STOP” switch continuity
Not continuous in the “” position → Replace.
Continuous in the “” position → Replace.
Å TT-R90
ı TT-R90E
Tester (+) lead → Black/White lead 1
Tester (–) lead → Black lead 2
B/W
1
B
2
Tester selec-
tor position
Ω × 1
Å
B B/W
1
2
ı
EC626002
IGNITION COIL INSPECTION
1. Inspect:
● Primary coil resistance
Out of specification → Replace.
2. Inspect:
● Secondary coil resistance
Out of specification → Replace.
N
OTE:
When inspecting the secondary coil resis-
tance, remove the spark plug cap.
Tester (+) lead → Orange lead 1
Tester (–) lead → Black lead 2
Primary coil
resistance
Tester selector
position
0.18 ~ 0.28 Ω at
20 ˚C (68 ˚F)
Ω × 1
Tester (+) lead → Spark plug lead 1
Tester (–) lead → Orange lead 2
Secondary coil
resistance
Tester selector
position
6.3 ~ 9.5 kΩ at
20 ˚C (68 ˚F)
kΩ × 1