Yamaha TT-R90(S), Owner'S Service Manual

Page: 324 / 364

6 - 6
– +
ELEC
IGNITION SYSTEM
2. Inspect:
●
Secondary coil resistance
Out of specification
→
Replace.
NOTE:
When inspecting the secondary coil resis-
tance, remove the spark plug cap.
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
CDI MAGNETO INSPECTION
1. Inspect:
●
Pickup coil resistance
Out of specification
→
Replace.
2. Inspect:
●
Source coil resistance
Out of specification
→
Replace.
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
Tester (+) lead
→
Brown lead 1
Tester (–) lead
→
Green lead 2
Source coil
resistance
Tester selector
position
688 ~ 1,032
Ω
at 20 ˚C (68 ˚F)
Ω ×
100