Suzuki DF 25 Service Manual page 170

(3) There are five (5) main bearing available, each of differ-
ing thickness.
To distinguish them, a color mark is painted at the position
indicated in figure.
Each color represents the following thickness measured at
the center of the bearing.
Color mark
Green
Black
No Color mark
Yellow
Blue
(4) Select crankshaft main bearing referring the below table.
Code stamped
A
on cylinder block
B
(Bearing holder
C
inside diameter)
NOTE:
Measure crankshaft journal oil clearance agian after installing
new bearing selected. (see page 7-50)
OIL SEAL
Inspect condition. If cracked, cut or damaged, replace.
Bearing thickness
1.996 – 2.000 mm
(0.0768 – 0.0787 in.)
1.999 – 2.003 mm
(0.0787 – 0.0789 in.)
2.002 – 2.006 mm
(0.0788 – 0.0790 in.)
2.005 – 2.009 mm
(0.0789 – 0.0791 in.)
2.008 – 2.012 mm
(0.0791 – 0.0792 in.)
Numeral stamped on crank web
(journal outside diameter)
1 2
Green Black
Black NO Color
NO Color Yellow
3
NO Color
Yellow
Blue
POWER UNIT 7-53
Color mark