Checking The Spark Plugs - Yamaha YZF-R6 99 Service Manual

CHECKING THE SPARK PLUGS

EB303040
CHECKING THE SPARK PLUGS
The following procedure applies to all of the
spark plugs.
1. Remove:
S rider seat
S fuel tank
Refer to "SEATS" and "FUEL TANK".
S air filter case
S heat protector plate
Refer to "AIR FILTER CASE AND IGNITION
COILS".
2. Disconnect:
S Ignition coils
3. Remove:
S spark plug
NOTE:
a. Remove the coupler.
b. Turn the coil counterdockwise. (5 to 6 turns
would be adequate.)
c. Pull out the coil upward.
Never pry the coupler with a screw driver.
d. Press the coil in the plug hole by hand as fa-
ras it will go.
e. Turn the coil clockwise and screw it in, 5 to 6
turns would be adequate.
f. Reins tall the coupler.
Do not strike on the coil with a hammer or the
like.
CAUTION:
Before removing the spark plugs, blow
away any dirt accumulated in the spark plug
wells with compressed air to prevent it from
falling into the cylinders.
4. Check:
S spark plug type
Incorrect ! Change.
3-22
CHK
ADJ
Spark plugs
type (manufacturer)
CR10EK (NGK)