TVS Jupiter BS-V1 Owner's Manual page 64

REAR SHOCK ABSORBERS
TVS Jupiter is provided with 3 step adjustable rear
shock absorbers to meet different road and load.
There are 3 notches for adjusting spring load.
If the spring is adjusted to the minimum notch, then
the shock absorber will be softer which is good for
light loads. If the spring is adjusted to maximum
notch, then it will be stiffer which is good for heavy
loads.
HARD
58
Adjust the spring pre-load by shifting the adjuster
to the required notch according to the different load
conditions. The more you compress the spring, the
suspension becomes more stiff.
SOFT