Yamaha YZ450F, Owner'S Service Manual

Page: 588 / 650

6 - 6
– +
ELEC
IGNITION SYSTEM
2. Inspect:
• Source coil 1 resistance
Out of specification
→
Replace.
3. Inspect:
• Source coil 2 resistance
Out of specification
→
Replace.
Tester (+) lead
→
Brown lead
1
Tester (–) lead
→
Green lead
2
Source coil 1
resistance
Tester selector
position
720 ~ 1,080
Ω
at
20 °C (68 °F)
Ω ×
100
Tester (+) lead
→
Pink lead
1
Tester (–) lead
→
Black lead
2
Source coil 2
resistance
Tester selector
position
44 ~ 66
Ω
at
20 °C (68 °F)
Ω ×
10
W
R
Br
G
P
B
2
1
2
1
W
R
Br
G
P
B
NEUTRAL SWITCH INSPECTION
1. Inspect:
• Neutral switch conduct
No continuity while in neutral
→
Replace.
Continuity while in gear
→
Replace.
EC628000
CDI UNIT INSPECTION
Check all electrical components. If no fault is
found, replace the CDI unit. Then check the
electrical components again.
Tester (+) lead
→
Sky blue lead
1
Tester (–) lead
→
Ground
2
Sb
1
Ground
2
Tester selec-
tor position
NEUTRAL
Ω ×
1
IN GEAR
– +
Ω×
1
1
2
Sb