Yamaha YZ125/LC Manuel D'atelier Du Proprietaire page 260

CYLINDER HEAD, CYLINDER AND PISTON
Piston clearance:
Standard
0.040~0.045 mm
(0.0016~0.0018 in)
EC474700
Combination of piston and cylinder
1. Check:
9 Cylinder mark a
Cylinder mark a a
A
B
C
D
2. Check:
9 Piston mark a
Piston mark a a (color)
A (red)
B (orange)
C (green)
D (purple)
3. Combination:
Combine the piston and cylinder by the fol-
lowing chart.
Cylinder mark
A
B
C
D
NOTE:
When you purchase a cylinder, you cannot des-
ignate its size. Choose the piston that matches
the above chart.
4-24
ENG
<Limit>
0.1 mm
(0.004 in)
Cylinder size
54.000~54.002 mm
(2.1260~2.1261 in)
54.004~54.006 mm
(2.1261~2.1262 in)
54.008~54.010 mm
(2.1263~2.1264 in)
54.012~54.014 mm
(2.1265~2.1265 in)
Piston size
53.957~53.960 mm
(2.1243~2.1244 in)
53.961~53.964 mm
(2.1244~2.1246 in)
53.965~53.968 mm
(2.1246~2.1247 in)
53.969~53.972 mm
(2.1248~2.1249 in)
Piston mark (color)
A (red)
B (orange)
C (green)
D (purple)