Yamaha WR450F, Owner'S Service Manual

Page: 684 / 794

6 - 4
– +
ELEC
IGNITION SYSTEM
MAIN SWITCH INSPECTION
1. Inspect:
• Main switch conduct
Continuous while the main switch is moved to
“OFF”
→
Replace.
Not continuous while the main switch is moved
to “ON”
→
Replace.
2. Inspect:
• Main switch indicator light
Use 12 V battery.
Indicator light does not come on
→
Replace.
3. Inspect:
• Rubber part
a
Tears/damage
→
Replace.
Tester (+) lead
→
Red lead
1
Tester (–) lead
→
Brown lead
2
R
1
Br
2
Tester selec-
tor position
ON
Ω ××××
1
OFF
Battery (+) lead
→
Red/Black lead
1
Battery (–) lead
→
Black lead
2
a
EC626002
IGNITION COIL INSPECTION
1. Remove the ignition coil cap.
2. Inspect:
• Primary coil resistance
Out of specification
→
Replace.
Tester (+) lead
→
Orange lead
1
Tester (–) lead
→
Black lead
2
Primary coil
resistance
Tester selector
position
0.08 ~ 0.10
Ω
at
20 °C (68 °F)
Ω ×
1