TVS StaR City+ Manual page 39

MAINTENANCE
Caution
Always use only recommended make and type of
spark plug. Replace spark plug every 12000 km.
Cover the spark plug hole with cloth when the plug
is removed to prevent dust / water entry.
It is advisable to tight the new spark plug by hand
A
0.7 ~ 0.9 mm
till the end and then loose and again re-tight the
spark plug by 1/8 of rotation after sealing by using
B
only the hand tool .
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