Yamaha YZ250N Owner's Service Manual page 500

IGNITION SYSTEM
2. Inspect:
9Source coil 1 resistance
Out of specification
Tester (+) lead Black/ Red lead 1
Tester (–) lead Black lead 2
Source coil 1
resistance
720~1,080Ω at
20°C (68°F)
3. Inspect:
9Source coil 2 resistance
Out of specification
Tester (+) lead Green/ Blue lead 1
Tester (–) lead Green/ White lead 2
Source coil 2
resistance
44~66Ω at
20°C (68°F)
EC628000
CDI UNIT INSPECTION
Check all electrical components. If no fault is
found, replace the CDI unit. Then check the
electrical components again.
6-5
ELEC
Replace.
Tester selector
position
Ω × 100
Replace.
Tester selector
position
Ω × 10