TVS Apache RTR 160 4V Owner's Manual page 73

Inspect the spark plug gap visually (0.7 ~ 0.9 mm). If
the gap is found to be more, replace the spark plug
with a new one.
After cleaning and inspecting the gap, reinstall
the spark plug and tighten by hand to avoid cross
threading. Finally tighten using the spanner. Do
not over tight or cross thread the spark plug. After
reassembling the plug fix back the suppressor cap
and ensure its proper fitment.
Caution
Always use only recommended make and type of spark
plug. Since the hook type spark plug is used, it is not
advised to adjust the plug electrodes as it may damage
the electrodes. Replace spark plug every 12000 km or
1 year whichever is earlier.
Cover the spark plug hole with a cloth when the plug is
removed to prevent entry of dust / water.
Do not remove the spark plug when the engine is hot. It
is advisable to tight the new spark plug by hand till the
end and then loose. Again re-tight the spark plug by 1/8
of rotation after sealing by using only the hand tool. Care
should be taken not to damage the spark plug cooling
duct (ram air duct) during dismantling / assembling the
spark plug.
70
ENGINE CUM TRANSMISSION OIL
Check the engine cum transmission oil level
periodically. The gauge oil level is provided at the
right-hand side crankcase cover. The check must be
performed when engine is in cold condition, after
placing the motorcycle in center stand with front
wheel touching the ground.
1. Place the motorcycle in an upright position on a
horizontal and firm surface.
2. Wipe-off the surroundings of gauge oil level.
3. Remove the gauge oil level and wipe it clean.
4. Re-insert the gauge oil level by completely
screwing it in.
5. Once again remove the gauge and check the oil
level.
Maximum
Minimum