TVS Jupiter BS-V1 Owner's Manual page 58

After cleaning and adjusting the gap, reinstall the
spark plug and tighten by hand to avoid cross
threading. Finally tighten using spark plug spanner.
Always use only recommended make and type of spark
plug. Replace spark plug every 12000 km.
Don't remove the spark plug when the engine is hot.
Cover the spark plug hole with cloth when the plug is
removed, to prevent dust / water entry.
It is advisable to tighten the new spark plug by hand till
the end, using plug spanner tighten by 1/4 turn. Then
loosen the plug by 1/8 turn and re-tighten using plug
spanner.
52
ENGINE OIL LEVEL
Check the engine oil level periodically.
1. Place the vehicle on centre stand on a flat surface.
Wipe-off the surroundings of gauge oil level.
2. Remove the gauge and wipe it clean.
3. Fix the gauge back to its mounting hole. Do not
thread in.
4. Take out the gauge and check the oil level. The
level should be between minimum and maximum
level marks of the gauge (shown in the figure).
5. If the oil is less than the minimum level, add 'TVS
TRU4 SKUUTA (SAE 10W30 API-SL, JASO MB)'
oil upto the maximum level mark.
Maximum
Minimum