Suzuki SY413 Service Manual page 1756

5-62 BRAKES
1. Caliper ass'y
2. Parking brake lever
3. Return spring
8) Once the piston is fitted all the way down, confirm that the boot
is fitted properly in the groove of caliper's cylinder by turning
manual adjustment gear clockwise to have the piston move up
about halfway.
NOTE:
Boot's face "B" should be at the same level from cylin-
der's face "A" all around.
9) Have the piston back to the bottom of cylinder.
10) Install parking brake return spring.