Yamaha YBR125ED 2005 Service Manual page 22

Item
Cylinder
Bore
Measuring point
Piston
Piston-to-cylinder clearance
Diameter D
Height H
Piston pin bore (in the piston)
Diameter
Offset
Offset direction
Piston pin
Outside diameter
Piston-pin-to-piston-pin-bore clear-
ance
Piston rings
Top ring
Ring type
Dimensions (B × T)
End gap (installed)
Ring side clearance
ENGINE SPECIFICATIONS
54.024 ~ 54.056 mm (2.1269 ~ 2.1282 in) 54.156 mm
40 mm (1.57 in)
0.019 ~ 0.035 mm (0.0007 ~ 0.0014 in)
53.997 ~ 54.029 mm (2.1259 ~ 2.1271 in)
H
D
4.8 mm (0.19 in)
15.002 ~ 15.013 mm (0.5906 ~ 0.5911 in) 15.043 mm
0.50 mm (0.0197 in)
Intake side
14.991 ~ 15.000 mm (0.5902 ~ 0.5906 in) 14.971 mm
0.002 ~ 0.022 mm (0.0001 ~ 0.0009 in)
B
T
Barrel
1.00 × 2.10 mm (0.039 × 0.082 in)
0.15 ~ 0.30 mm (0.006 ~ 0.012 in)
0.035 ~ 0.070 mm (0.0014 ~ 0.0028 in)
Standard
2 - 6
SPEC
Limit
(2.1321 in)
----
0.15 mm
(0.0059 in)
----
----
(0.5922 in)
----
----
(0.5894 in)
0.072 mm
(0.0028 in)
----
----
0.55 mm
(0.022 in)
0.120 mm
(0.0047 in)