Honda CBF125NA 2018 Owner's Manual page 83

20171012170126_32K98B000_eng_BOOK Page 83 Thursday, October 12 2017 17:09:26 JST
Spark Plug Checking Spark Plug
u
Check the spark plug gap using a wire-
5.
type feeler gauge.
If adjustment is necessary, bend the
u
side electrode carefully.
The gap should be:
0.70 - 0.80 mm (0.028 - 0.031 in)
Spark plug gap
Make sure the plug washer is in good
6.
condition.
Install the spark plug. With the plug
7.
washer attached, thread the spark plug in
by hand to prevent cross-threading.
80
Tighten the spark plug:
8.
●
●
Side electrode
NOTICE
An improperly tightened spark plug can damage
Plug washer
the engine. If a plug is too loose, a piston may be
damaged. If a plug is too tight, the threads may
be damaged.
Install the parts in the reverse order of
9.
removal.
u
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:
NGK: 1/2 turn after it seats.
DENSO: 3/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
When reinstalling the spark plug cap,
take care to avoid pinching any cables
or wires.