Suzuki DL650A Owner's Manual page 73

Spark Plug Cleaning
To maintain a hot, strong spark,
keep the plugs free from carbon.
Adjust the gap to 0.7 – 0.8 mm
(0.028 – 0.031 in) for good igni-
tion. Use a thickness (feeler)
gauge to check the gap.
0.7 – 0.8 mm
(0.028 – 0.031 in)
Installation
To install a spark plug, turn it in as
far as possible with your fingers,
then tighten it with a wrench.
CAUTION
A crossthreaded or overtight-
ened spark plug will damage
the aluminum threads of the
cylinder head.
Follow the procedure below to
tighten the spark plug properly.
Carefully turn the spark plug by
hand into the threads until it is fin-
ger tight. If the spark plug is new,
tighten it with a wrench about 1/2
turn past finger tight. If you are
reusing the old spark plug, tighten
it with a wrench about 1/8 turn
past finger tight.
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