Yamaha 2005 BT1100 Supplementary Service Manual page 78

EAS00743
4. Ignition spark gap
The following procedure applies to all of the
spark plugs.
• Disconnect the spark plug cap from the spark
plug.
• Connect the ignition checker 1 as shown.
• Spark plug cap 2.
• 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
• Is there a spark and is the spark gap within
specification ?
NO
EAS00745
5. Spark plug cap resistance.
The following procedure applies to all of the
spark plug caps.
• Disconnect the spark plug cap from the spark
plug.
• Connect the pocket tester (
spark plug cap as shown.
• Measure the spark plug cap resistance.
YES
The ignition system is
OK.
1k) to the
IGNITION SYSTEM
Spark plug cap resistance
10 k at 20°C (68 °F)
• Is the spark plug cap OK?
YES
EAS00747
6. Ignition coil resistance
The following procedure applies to all of the
ignition coils.
• Disconnect the ignition coil connectors from
the ignition coil terminals.
• Connect the pocket tester (
tion coil as shwon.
Tester positive probe
Tester negative probe
• Measure the primary coil resistance.
Primary coil resistance
3.57
• Connect the pocket tester (
ignition coil as shown.
• Measure the secondary coil resistance.
Tester positive probe
Tester negative probe
70
ELEC
NO
Replace the spark
plug cap.
1) to the igni-
¡
Red/Black
¡
Orange (Gray)
4.83 at 20°C (68 °F)
1k) to the
¡
spark plug lead 1
¡
Orange (gray) lead 2