Suzuki Baleno Manual page 1515

5) Remove cap and using a scale on gaging plastic envelope,
measure gaging plastic width at the widest point (clearance).
If clearance exceeds its limit, use a new standard size bearing
and remeasure clearance.
Bearing
clearance
6) If clearance can not be brought to within its limit even by using
a new standard size bearing, regrind crankpin to undersize and
use 0.25 mm undersize bearing.
1. Gaging plastic
2. Scale
ASSEMBLY
NOTE:
Two sizes of piston are available as standard size spare part
so as to ensure proper piston-to-cylinder clearance. When
installing a standard size piston, make sure to match piston
with cylinder as follows.
a) Each piston has stamped number 1 or 2 as shown. It represents
outer diameter of piston.
b) There are also stamped numbers of 1 and 2 on the cylinder
block as shown. The first number represents inner diameter of
No.1 cylinder, the second number of No.2 cylinder, the third
number of No.3 cylinder and the fourth number of No.4 cylinder.
ENGINE MECHANICAL (G13/G16 TYPE ENGINE) 6A1-55
Item Standard
0.020 – 0.050 mm
(0.0008 – 0.0019 in.)
Limit
0.0080 mm
(0.0031 in.)