Checking The Ignition Coils; Checking The Ignition Spark Gap - Yamaha 2014 MT-07 Service Manual

c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continuity.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
EAS30558

CHECKING THE IGNITION COILS

The following procedure applies to all of the igni-
tion coils.
1. Check:
• Primary coil resistance
Out of specification → Replace.
Primary coil resistance
1.19–1.61 Ω
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Disconnect the ignition coil coupler from the
ignition coil.
b. Connect the pocket tester (Ω × 1) to the igni-
tion coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Ignition coil terminal "1"
• Negative tester probe
Ignition coil terminal "2"
c. Measure the primary coil resistance.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
8.50–11.50 kΩ
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Connect the pocket tester (Ω × 1 k) to the ig-
nition coil as shown.
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
ELECTRICAL COMPONENTS
▲▲▲
• Negative tester probe
Ignition coil terminal "1"
• Positive tester probe
Spark plug terminal "2"
▼▼▼
b. Measure the secondary coil resistance.
▲ ▲▲▲ ▲ ▲▲▲ ▲
EAS30556

CHECKING THE IGNITION SPARK GAP

1. Check:
• Ignition spark gap
Out of specification → Perform the ignition
system troubleshooting, starting with step 5.
Refer to "TROUBLESHOOTING" on page
8-4.
TIP
If the ignition spark gap is within specification,
the ignition system circuit is operating normally.
▼ ▼▼▼ ▼ ▼▼▼ ▼
a. Remove the ignition coil from the spark plug.
b. Connect the ignition checker "1" as shown.
▲▲▲
▼▼▼
8-134
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1
2
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
Minimum ignition spark gap
6.0 mm (0.24 in)
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
Ignition checker
90890-06754
Oppama pet–4000 spark checker
YM-34487
▲ ▲▲▲ ▲ ▲▲▲
▼ ▼▼▼ ▼ ▼▼▼