Checking The Ignition Spark Gap - Yamaha TMAX 2020 Service Manual

Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe
Orange "1"
• Negative tester probe 
Red/Black "2"
c. Measure the primary coil resistance.
2. Check:
• Secondary coil resistance
Out of specification  Replace.
Secondary coil resistance
12.00–18.00 k
a. Disconnect the spark plug cap from the
ignition coil.
b. Connect the digital circuit tester () to the
ignition coil as shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe 
Spark plug lead "1"
• Negative tester probe 
Spark plug lead "2"
2
1
8-103
ELECTRICAL COMPONENTS
c. 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-
5.
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
TIP
If the ignition spark gap is within specification,
the ignition system circuit is operating normally.
a. Disconnect the spark plug cap from the
spark plug.
b. Connect the ignition checker "1" as shown.
Ignition checker
90890-06754
Oppama pet–4000 spark checker
YM-34487
c. Push the ON/start switch and the engine
stop switch to " ".
d. Measure the ignition spark gap "a".
G089051
2. Spark plug cap
e. Crank the engine by pushing the ON/start
switch and gradually increase the spark
gap until a misfire occurs.
2
1