Yamaha TW200N Service Manual page 79

2. Ignition spark gap
The following procedure applies to all of the
spark plug.
• Disconnect the spark plug cap from the
spark plug.
• Connect the dynamic spark tester 1 as
shown.
• 2 Spark plug cap
• Set the main switch to "ON".
• Measure the ignition spark gap a.
• Crank the engine by pushing the start
switch and gradually increase the spark gap
until a misfire occurs.
Min.ignition spark gap
6 mm (0.24 in)
• Is there a spark and is the spark gap within
specification?
NO
YES
The ignition system
is OK.
– 72 –
IGNITION SYSTEM
3. Spark plug cap resistance
The following procedure applies to all of the
spark plug cap.
• Disconnect the spark plug cap from the
spark plug.
• Connect the pocket tester(Ω × 1k) to the
spark plug cap as shown.
• Measure the spark plug cap resistance.
Spark plug cap resistance
10 kΩ at 20 °C (68 °F)
• Is the spark plug cap OK?
YES
– +
ELEC
NO
Replace the spark
plug cap.