Yamaha TZ125M1 Owner's Service Manual page 112

CYLINDER HEAD, CYLINDER AND PISTON
2. Check:
*
• Piston mark a
Piston mark a a (color)
B (orange)
3. Combination:
Combine the piston and cylinder by the fol-
(
lowing chart.
Cylinder mark
A
B
C
NOTE:
When you purchase a cylinder, you cannot
designate a specific one. Choose the piston
that matches the above chart.
EC475000
ASSEMBLY AND INSTALLATION
EC475261
Piston ring and piston
1. Install:
• Piston ring 1
NOTE:
• Take care not to scratch the piston or damage
the piston ring.
• Install the piston ring with its mark "N"
upward.
• Align the piston ring gap with the pin 2.
• After installing the piston ring, check the
smooth movement of it.
2. Install:
• Gasket (cylinder) 1N
• Small end bearing 2
• Dowel pin 3
NOTE:
• Apply the engine oil on the bearing (crank-
shaft and connecting rod) and connecting rod
big end washers.
• Install the gasket with the seal print side
toward the crankcase.
4-24
ENG
A (red)
C (green)
Piston mark (color)
A(red)
B(orange)
C (green)