Honda CB350RS II Manual page 62

Spark Plug Checking Spark Plug
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5. Check the spark plug gap using a wire-type
feeler gauge.
If adjustment is necessary, bend the side
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electrode carefully.
The gap should be:
0.8 to 0.9 mm (0.03 to 0.04 in)
Spark plug gap
6. Make sure the plug washer is in good
condition.
7. Install the spark plug. With the plug washer
attached, thread the spark plug in by hand to
prevent cross-threading.
60
8. Tighten the spark plug:
z
z
Side electrode
NOTICE
An improperly tightened spark plug can damage the
engine. If a plug is too loose, a piston may be
Plug washer
damaged. If a plug is too tight, the threads may be
damaged.
9. Install the parts in the reverse order of
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:
1/2 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
removal.
When reinstalling the spark plug cap, take
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care to avoid pinching any cables or wires.