Yamaha TTR90(M), Owner'S Service Manual

Page: 272 / 287

6 - 4
– +
ELEC
IGNITION SYSTEM
EC626002
IGNITION COIL INSPECTION
1. Inspect:
●
Primary coil resistance
Out of specification
→
Replace.
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
2. Inspect:
●
Secondary coil resistance
Out of specification
→
Replace.
NOTE:
When inspecting the secondary coil resis-
tance, remove the spark plug cap.
EC627011
CDI MAGNETO INSPECTION
1. Inspect:
●
Pickup coil resistance
Out of specification
→
Replace.
Tester (+) lead
→
Spark plug lead 1
Tester (–) lead
→
Orange lead 2
Secondary coil
resistance
Tester selector
position
6.3 ~ 9.5 k
Ω
at
20 ˚C (68 ˚F)
k
Ω ×
1
Tester (+) lead
→
Red lead 1
Tester (–) lead
→
White lead
2
Pickup coil
resistance
Tester selector
position
248 ~ 372
Ω
at
20 ˚C (68 ˚F)
Ω ×
100