HYOSUNG 2010 ST7 Service Manual page 191

7-7 ELECTRICAL SYSTEM
ELECTRODE'S CONDITION
Check to see the worn or burnt condition of the elec-
trodes.
If it is extremely worn or burnt, replace the spark plug.
Replace the spark plug if it has a broken insulator,
damaged thread, etc.
CAUTION
Use recommended spark plugs only.
A spark plug of the wrong rating may shorten
engine life and cause loss of performance.
SPARK PLUG INSTALLATION
CAUTION
Before tightening the spark plug to the specified
torque, carefully turn the spark plug by finger
into the threads of the cylinder head to prevent
damage the aluminum threads.
● First, finger tighten the spark plugs, and then tight-
en them to the specified torque.
Spark plug : 11 N m (1.1 kgf m)