Suzuki Baleno Manual page 390

INSPECT BRAKE DISC
Before this inspection, brake pads must be removed (according to
step 1) to 8) of "REMOVAL" under "REMOVE AND INSTALL PAD
(SHOE & LINING)" of "REAR DISC BRAKE" in this section.
Check disc surface for scratches in wearing parts.
Scratches on disc surface noticed at the time of specified inspec-
tion or replacement are normal and disc is not defective unless they
are serious.
But when there are deep scratches or scratches all over disc sur-
face, replace it. When only one side is scratched, polish and correct
that side.
Disc thickness
Standard :10 mm (0.39 in.)
Limit : 8 mm (0.31 in.)
To measure deflection of disc, take measurement at 2 points on its
periphery and center with dial gauge while rotating it.
Limit on disc deflection: 0.1 mm (0.0039 in.)
NOTE:
Check front wheel bearing for looseness before measure-
ment.
BRAKES 5-65