Honda CBF500/A Owner's Manual page 91

3. Inspect the
porcelain for deposits, erosion or carbon
fouling. If the erosion or deposit is heavy
replace the plug. Clean a carbon or wet-
fouled plug with a plug cleaner, otherwise
use a wire brush.
4. Check the spark plug gap (2) using a wire-
type feeler gauge. If adjustment is
necessary, bend the side electrode (3)
carefully.
The gap should be:
0.8-0.9 mm (0.03-0.04 in)
(3)
(2) Spark plug cap
electrodes and
(2)
(3) Side electrode
center 5. With the plug washer attached, thread the
spark plug in by hand to prevent cross-
threading.
6. Tighten the spark plug 1/2 turn with a spark
plug wrench to compress the washer.
If you are reusing a plug, it should only take
1/8 - 1/4 turn after the plug seats.
7. Refit the pipettes to the spark plugs.
8. Install the remaining parts in the reverse
order of removal.
NOTICE
The spark plug must be securely tightened. An
improperly tightened plug can become very hot
and possibly damage the engine.
77