Honda HSS622 Owner's Manual page 54

5. Measure the plug gap with a feeler gauge.
Correct as necessary by carefully bending the side electrode.
The gap should be:
0.7–0.8 mm (0.028–0.031 in)
Recommended spark plug: BPR5ES (NGK)
6.Make sure that the sealing washer is in good condition and thread
the spark plug in by hand to prevent cross-threading.
7.After the spark plug is seated, tighten with a spark plug wrench to
compress the washer.
NOTE:
If installing a new spark plug, tighten 1/2 turn after the spark plug
seats to compress the washer. If reinstalling a used spark plug, tighten
1/8 to 1/4 turn after the spark plug seats.
CAUTION:
• Use only the recommended spark plugs or equivalent plugs. Spark
plugs which have an improper heat range may cause engine damage.
• The spark plug must be securely tightened. An improperly tightened
spark plug can become very hot and may damage the engine.
W16EPR-U (DENSO)
SIDE ELECTRODE
PLUG GAP
0.7–0.8 mm
(0.028–0.031 in)
SEALING WASHER
INSULATOR
51