Yamaha 2004 WR250FS Owner's Service Manual page 303

2
1
R W
1
Sb L/W
Ω×1
– +
2
6 - 7
IGNITION SYSTEM
AC MAGNETO INSPECTION
1. Inspect:
• Pickup coil resistance
Out of specification → Replace.
Tester (+) lead → Red lead 1
Tester (–) lead → White lead 2
Pickup coil
resistance
248 ~ 372 Ω at
20 °C (68 °F)
NEUTRAL SWITCH INSPECTION
1. Inspect:
• Neutral switch conduct
Tester (+) lead → Sky blue lead 1
Tester (–) lead → Ground 2
Sb
1
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.
– +
ELEC
Tester selector
position
Ω × 100
Tester selector
Ground
2
position
Ω × 1