Yamaha YZF-R1S Service Manual page 404

EAS00743
4. Ignition spark gap
The following procedure applies to all of the
spark plugs.
S Disconnect the spark plug cap from the
spark plug.
S Connect the ignition checker
plug cap 2 as shown.
S Set the main switch to "ON".
S Measure the ignition spark gap
S Crank the engine by pushing the starter
switch and gradually increase the spark gap
until a misfire occurs.
Minimum ignition spark gap
6 mm (0.24 in)
S Is there a spark and is the spark gap within
specification?
NO
EAS00747
5. Ignition coil resistance
The following procedure applies to all of the
ignition coils.
S Disconnect the ignition coil leads from the
wire harness.
S Connect the pocket tester (Ω
ignition coil as shown.
1
and spark
a
.
YES
The ignition system
is OK.
1) to the
8-11
IGNITION SYSTEM
Positive tester probe !
Negative tester probe !
S Measure the primary coil resistance.
Primary coil resistance
1.19 X 1.61 Ω at 20_C
S Connect the pocket tester (Ω
ignition coil as shown.
Negative tester probe !
ignition coil terminal
Positive tester probe !
spark plug terminal
S Measure the secondary coil resistance.
Secondary coil resistance
8.5 X 11.5 kΩ at 20_C
S Is the ignition coil OK?
YES
ELEC
ignition coil terminal
ignition coil terminal
1k) to the
1
2
NO
Replace the ignition
coil.