Yamaha TW200N Service Manual page 80

4. Ignition coil resistance
• Disconnect the ignition coil connector from
the ignition coil terminal.
• Connect the pocket tester (Ω × 1) to the
ignition coil as shown.
Tester Positive → orange
Tester negative → ignition coil base
• Measure the primary coil resistance.
Primary coil resistance
0.18 ~ 0.28 Ω at 20 °C (68 °F)
• Connect the pocket tester (Ω × 1k) to the
ignition coil as shown.
• Measure the secondary coil resistance.
Tester positive probe → orange
Tester positive probe → spark plug lead
Secondary coil resistance
6.32 ~ 9.48 kΩ at 20 °C (68 °F)
• Is the ignition coil OK?
YES
NO
Replace the ignition
coil.
– 73 –
IGNITION SYSTEM
5. 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.
Tester positive probe → white 1
Tester negative probe → red 2
• Measure the pickup coil resistance.
Pickup coil resistance
656 ~ 984 Ω at 20 °C (68 °F)
(between white and red)
• Is the pickup coil OK?
YES
– +
ELEC
NO
Replace the pickup
coil.