Yamaha YZ250(P)/LC Owner's Service Manual page 504

IGNITION SYSTEM
2. Inspect:
9
Source coil 1 resistance
Out of specification ¡ Replace.
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:
9
Source coil 2 resistance
Out of specification ¡ Replace.
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
Tester selector
position
Ω × 100
Tester selector
position
Ω × 10