Yamaha YZ125(D) Owner's Service Manual page 27

Item
Cylinder:
Bore size
Taper limit
Out of round limit
Piston:
Piston size/
Measuring point "H"
Piston clearance
Piston offset
Piston pin:
Piston pin outside diameter
Piston ring:
Sectional sketch
End gap (installed)
Side clearance (installed)
Crankshaft:
Crank width "A"
Runout limit "C"
Connecting rod big end side clearance "D"
Small end free play "F"
MAINTENANCE SPECIFICATIONS
Standard
54.000–54.014 mm (2.1260–2.1265 in)
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53.957–53.972 mm (2.1243–2.1249 in)
17.5 mm (0.69 in)
0.040–0.045 mmm (0.0016–0.0018 in)
0.5 mm (0.019 in)/EX-side
14.995–15.000 mm (0.5904–0.5906 in)
Plain
B=1.0 mm (0.039 in)
T=2.35 mm (0.093 in)
0.5–0.7 mm (0.020–0.028 in)
0.035–0.070 mm (0.0014~0.0028 in)
55.90–55.95 mm (2.201–2.203 in)
0.03 mm (0.0012 in)
0.06–0.64 mm (0.002–0.025 in)
0.8–1.0 mm (0.031–0.039 in)
2-3
Limit
54.1 mm
(2.130 in)
0.05 mm
(0.0020 in)
0.01 mm
(0.0004 in)
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0.1 mm (0.004
in)
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14.975 mm
(0.5896 in)
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1.2 mm (0.047
in)
0.1 mm (0.004
in)
----
0.05 mm
(0.0020 in)
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2.0 mm (0.08
in)