Yamaha TT-R125(M) Owner's Service Manual page 74

Piston:
Piston to cylinder clearance
Piston size "D"
D
Piston over size
Measuring point "H"
Piston off-set
Piston pin bore inside diameter
Piston pin outside diameter
Piston rings:
Top ring
Type
Dimensions (B
End gap (installed)
Side clearance (installed)
2nd ring
Type
Dimensions (B
End gap (installed)
Side clearance
Oil ring
Dimensions (B
End gap (installed)
MAINTENANCE SPECIFICATIONS
Item
H
(2nd)
(4th)
T
T)
T
T)
T
T)
Standard
0.020 ~ 0.026 mm
(0.0008 ~ 0.0010 in)
53.977 ~ 53.996 mm
(2.1251 ~ 2.1258 in)
54.5 mm (2.1457 in)
55.0 mm (2.1654 in)
5 mm (0.20 in)
0.5 mm (0.0197 in)
15.002 ~ 15.013 mm
(0.5906 ~ 0.5911 in)
14.991 ~ 15.000 mm
(0.5902 ~ 0.5906 in)
B
Barrel
1.0 2.1 mm (0.04
0.15 ~ 0.30 mm
(0.006 ~ 0.012 in)
0.035 ~ 0.090 mm
(0.0014 ~ 0.0035 in)
B
Taper
1.0 2.1 mm (0.04
0.30 ~ 0.45 mm
(0.012 ~ 0.018 in)
0.020 ~ 0.060 mm
(0.0008 ~ 0.0024 in)
B
2.0 2.2 mm (0.08
0.20 ~ 0.70 mm (0.01 ~ 0.03 in)
2 - 7
SPEC
Limit
0.15 mm
(0.0059 in)
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15.043 mm
(0.5922 in)
14.971 mm
(0.5894 in)
----
0.08 in) ----
0.4 mm
(0.016 in)
0.12 mm
(0.0047 in)
----
0.08 in) ----
0.55 mm
(0.022 in)
0.12 mm
(0.0047 in)
0.09 in) ----
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