Yamaha YZ250F(R) Owner's Service Manual page 273

2
1
2
W Br
R G
1
IGNITION SYSTEM
EC626002
IGNITION COIL INSPECTION
1. Inspect:
Primary coil resistance
●
Out of specification → Replace.
Tester (+) lead → Orange lead 1
Tester (–) lead → Black lead 2
Primary coil
0.08 ~ 0.10 Ω at
20 ˚C (68 ˚F)
2. Inspect:
Secondary coil resistance
●
Out of specification → Replace.
Tester (+) lead → Spark plug terminal 1
Tester (–) lead → Orange lead 2
Secondary coil
4.6 ~ 6.8 kΩ at
20 ˚C (68 ˚F)
3. Inspect:
Sealed portion of ignition coil a
●
Spark plug terminal pin b
●
Threaded portion of spark plug c
●
Wear → Replace.
CDI MAGNETO INSPECTION
1. Inspect:
Pickup coil resistance
●
Out of specification → Replace.
Tester (+) lead → Red lead 1
Tester (–) lead → White lead 2
Pickup coil
P
248 ~ 372 Ω at
B
20 ˚C (68 ˚F)
6 - 5
ELEC
Tester selector
resistance position
Ω × 1
Tester selector
resistance position
kΩ × 1
Tester selector
resistance position
Ω × 100
– +