Yamaha YZF-R1 Series Service Manual page 480

Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Negative tester probe
Ignition coil terminal "1"
• Positive tester probe
Spark plug terminal "2"
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.
Minimum ignition spark gap
6.0 mm (0.24 in)
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.
Ignition checker
90890-06754
Oppama pet–4000 spark checker
YM-34487
1
EAS30560
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
2. Check:
8-45
ELECTRICAL COMPONENTS
2. Ignition coil
c. Turn the main switch to "ON".
d. Measure the ignition spark gap "a".
e. Crank the engine by pushing the " " side
of the start/engine stop switch and gradu-
ally increase the spark gap until a misfire
occurs.
• Crankshaft position sensor coupler
(from the wire harness)
• Crankshaft position sensor resistance
Out of specification → Replace the crank-
shaft position sensor.
Crankshaft position sensor resis-
tance
189–231 Ω
a. Connect the digital circuit tester (Ω) to the
crankshaft position sensor coupler as
shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
black "1"
• Negative tester probe
gray "2"