Checking The Spark Pugs - Yamaha XVS250 2001 Service Manual

ADJUSTING THE THROTTLE CABLE FREE PLAY/
CHECKING THE SPARK PLUGS
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 en-
gine idling speed to change.
4. Install:
S fuel tank
EAS00060
CHECKING THE SPARK PLUGS
1. Disconnect:
S spark plug cap
2. Remove:
S spark plug
CAUTION:
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from fal-
ling into the cylinder.
3. Check:
S spark plug type
Incorrect  Change.
Spark plug type (manufacturer)
CR6HSA (NGK)
U20FSR-U (DENSO)
4. Check:
S electrode 1
Damage/wear  Replace the spark plug.
S insulator 2
Abnormal color  Replace the spark plug.
Normal color is a medium-to-light tan color.
5. Clean:
S spark plug
(with a spark plug cleaner or wire brush)
6. Measure:
S spark plug gap a
(with a wire gauge)
Out of specification  Regap.
3-12
WARNING
Spark plug gap
0.6 X 0.7 mm
CHK
ADJ