Honda CBF500/A, Owner'S Manual

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3. Inspect the electrodes and center
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)
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.
The spark plug must be securely tightened. An
improperly tightened plug can become very hot
and possibly damage the engine.
NOTICE
(2) Spark plug cap (3) Side electrode
(2)
(3)
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