Troubleshooting - Yamaha TW200N Service Manual

TROUBLESHOOTING

The ignition system fails to operate (no
spark or intermittent spark).
Check:
1. spark plug
2. ignition spark gap
3. spark plug cap resistance
4. ignition coil resistance
5. pickup coil resistance
6. source coil resistance
7. main switch
8. engine stop switch
9. sidestand switch
10.wiring (of the entire ignition system)
NOTE:
• Before troubleshooting, remove the following
part (-s):
1) rider seat
2) fuel tank
3) side cover (left and right)
• Troubleshoot with the following special
tool (-s).
Dynamic spark tester
YM-34487
Pocket tester
YU-03112
IGNITION SYSTEM
1. Spark plug
The following procedure applies to all of the
spark plug.
• Check the condition of the spark plug.
• Check the spark plug type.
• Measure the spark plug gap.
Standard spark plug
DR8EA (NGK)
X24ESR-U (DENSO)
Spark plug gap
0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
• Is the spark plug in good condition, is it of
the correct type, and its gap within specifi-
cation?
YES
– 71 –
– +
ELEC
NO
Re-gap or replace
the spark plug.