User Manual - Page 126

For 2012 TRX450R.

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119
Spark Plug
Servicing Your Honda
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.
With the plug washer attached, thread the spark plug in by hand to
prevent cross-threading.
Tighten the spark plug:
If the old plug is good:
1/8 turn after it seats.
If installing a new plug, tighten it twice to prevent loosening:
First, tighten the plug:
NGK: turn after it seats.
DENSO: turn after it seats.
Then loosen the plug.
Next, tighten the plug again:
1/8 turn after it seats.
Reinstall the spark plug cap. Take care to avoid pinching any cables
or wires.
6.
a)
b)
c)
7.
3/4
1/2
8.
11/05/25 11:36:03 31HP1660 0128 
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