Honda FF500 Manuel De L'utilisateur page 46

5. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
6. After the spark plug is seated, tighten with a spark plug wrench to compress
the washer.
When installing a new spark plug, tighten 1/2 turn after the spark plug seats to
compress the washer.
When reinstalling the used spark plug, tighten 1/8-1/4 turn after the spark plug
seats to compress the washer.
• TORQUE: 20 N∙m (2.0 kgf∙m, 15 lbf∙ft)
CAUTION:
The spark plug must be securely tightened. An improperly tightened plug
can become very hot and possibly damage the engine.
7. After installing the spark plug, install the spark plug cap securely.
SPARK PLUG CAP
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