Yamaha 2002 YFM350X Supplemental Service Manual page 25

5.Spark plug cap resistance
Remove the spark plug cap.
G
Connect the pocket tester (Ω × 1k) to the
G
spark plug cap.
Check that the spark plug cap has the
G
specified resistance.
Spark plug cap resistance:
10 kΩ at 20 °C (68 °F)
6.Ignition coil resistance
Disconnect the ignition coil connector from
G
the wire harness.
Connect the pocket tester (Ω × 1) to the
G
ignition coil.
Tester (+) lead → Orange lead terminal
Tester (–) lead → Ignition coil base
Check that the primary coil has the speci-
G
fied resistance.
Primary coil resistance:
0.18 ~ 0.28 Ω at 20 °C (68 °F)
*
MEETS
SPECIFICATION
IGNITION SYSTEM
OUT OF SPECIFICATION
Replace the spark plug cap.
– 17 –
– +
ELEC