TVS Apache RR 310 Owner's Manual page 130

Warning
The rear shock absorber contains highly compressed
gas. Do not try to open or disassemble it in any way.
Take a special care while turning the pre-load adjuster
because, your hand may be striking against the other
parts of the motorcycle if the adjuster spanner slips out
of the pre-load adjuster notch.
Caution
Rear shock absorber to be adjusted only on the left side
of the vehicle.
Adjust step by step (3rd to 4th notch and so on). Do not
go at a stretch as it will damage the adjuster.
Rebound damping
The shock absorber is provided with rebound damping
force adjustment.
To increase the damping turn the adjuster screw
clockwise and to reduce the damping turn the
adjuster screw towards anti-clockwise, as shown.
(ref. Fig. 42)
During adjustment count the numbers of clicks from
fully closed (clockwise) position.
Fig. 42
117
117