Yamaha YFZ450S 2003 Service Manual page 336

EBS01040
10.Pickup coil resistance
• Disconnect the pickup coil coupler from
the wire harness.
• Connect the pocket tester (Ω × 100) to the
pickup coil terminal as shown.
Positive tester probe → white terminal 1
Negative tester probe → red terminal 2
• Measure the pickup coil resistance.
Pickup coil resistance
248 ~ 372 Ω at 20 °C (68 °F)
• Is the pickup coil OK?
YES
W R
1 2
NO
Replace the pickup
coil/stator assembly.
IGNITION SYSTEM
EBS01047
11.Wiring
• Check the entire ignition system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the ignition system's wiring properly
connected and without defects?
Replace the C.D.I.
unit.
8 - 13
ELEC
YES
Properly connect or
repair the
system's wiring.
– +
NO
ignition