Yamaha YZ450FT Owner's Service Manual page 279

1
2
W
R
1
2
W
R
Ω×1
1
– +
Sb
IGNITION SYSTEM
2. Inspect:
• Source coil 1 resistance
Out of specification → Replace.
Tester (+) lead → Brown lead 1
Tester (–) lead → Green lead 2
1
Br P
G B
2
3. Inspect:
• Source coil 2 resistance
Out of specification → Replace.
1
Tester (+) lead → Pink lead 1
Tester (–) lead → Black lead 2
Br P
G B
2
NEUTRAL SWITCH INSPECTION
1. Inspect:
• Neutral switch conduct
Tester (+) lead → Sky blue lead 1
Tester (–) lead → Ground
NEUTRAL
IN GEAR
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.
6 - 6
ELEC
Source coil 1 Tester selector
resistance
720 ~ 1,080 Ω at
20 °C (68 °F)
Source coil 2 Tester selector
resistance
44 ~ 66 Ω at
20 °C (68 °F)
Sb
Ground
1
– +
position
Ω × 100
position
Ω × 10
Tester selec-
tor position
Ω × 1