Checking The Spark Plugs - Yamaha BT1100 2002 Service Manual

ADJUSTING THE THROTTLE CABLE FREE PLAY/
1
2
2

CHECKING THE SPARK PLUGS

Direction a
Direction b
c. Tighten the locknut.
WARNING
After adjusting the throttle cable free play,
turn the handlebar to the right and to the left
to ensure that this does not cause the engine
idling speed to change.
EASB0004
CHECKING THE SPARK PLUGS
The following procedure applies to all of the spark
plugs.
1. Remove:
• cylinder head covers 1
2. Disconnect:
• spark plug caps 2
3. Remove:
• spark plugs
CAUTION:
Before removing the spark plugs, blow away
1
any dirt accumulated in the spark plug wells
with compressed air to prevent it from falling
into the cylinders.
4. Check:
• spark plug type
Incorrect
Spark plug type (manufacturer)
BPR7ES (NGK) - W22EPR-U (DENSO)
5. Check:
• electrode 1
Damage/wear
• insulator 2
Abnormal color
Normal color is a medium-to-light tan color.
6. Clean:
• spark plug
(with a spark plug cleaner or wire brush)
7. Measure:
• spark plug gap a (with a wire gauge)
Out of specification
Spark plug gap
3-11
INSP
ADJ
Throttle cable free play
is increased.
Throttle cable free play
is decreased.
Change.
Replace the spark plug.
Replace the spark plug.
Regap.
0.7 ~ 0.8 mm