Honda PCX 150 Owner's Manual page 256

1.
Adjust by turning the rear brake adjusting
nut a half-turn at a time.
Brake arm pin
Decrease
Freeplay
2.
Apply the brake several times and check
for free wheel rotation after the brake
lever is released.
Brakes
Increase
Freeplay
Adjusting nut
Adjusting the Rear Brake Lever Freeplay
u
3.
Push the brake arm to confirm that there
is a gap between the rear brake adjusting
nut and brake arm pin.
Brake arm
Push
Brake arm pin
Gap
After adjustment, confirm the freeplay of the
brake lever.
Make sure the brake arm, spring and fastener
are in good condition.
NOTICE
Do not turn the adjuster beyond its natural limits.
Adjusting nut
99