Honda CTX700D 2018 Owner's Manual page 78

Spark Plug Checking Spark Plug
u
Install the spark plugs. With the plug
7.
washers attached, thread the spark plugs
in by hand to prevent cross-threading.
Tighten each spark plug:
8.
If the old plug is good:
●
1/8 turn after it seats
If installing a new plug, tighten it twice
●
to prevent loosening:
a) First, tighten the plug:
2/3 turn after it seats
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats
NOTICE
An improperly tightened spark plug can damage
the engine. If a plug is too loose, a piston may be
damaged. If a plug is too tight, the threads may
be damaged.
74
Install the parts in the reverse order of
9.
removal.
When reinstalling the spark plug caps,
u
take care to avoid pinching any cables
or wires.