Yamaha YZ125(P)/LC, Owner'S Service Manual

Page: 266 / 564

4-27
ENG
CYLINDER HEAD, CYLINDER AND PISTON
EC475233
Piston ring and piston
1. Install:
9
Piston ring
1
NOTE:
9
Take care not to scratch the piston or damage
the piston ring.
9
Align the piston ring gap with the pin
2
.
9
After installing the piston ring, check the
smooth movement of it.
2. Install:
9
Gasket (cylinder)
1
9
Small end bearing
2
9
Dowel pin
3
NOTE:
9
Apply the engine oil onto the bearing (crank-
shaft and connecting rod) and connecting rod
big end washers.
9
Install the gasket with the seal print side
toward the crankcase.
3. Install:
9
Piston
1
9
Piston pin
2
9
Piston pin clip
3
NOTE:
9
The arrow
a
on the piston dome must point to
exhaust side.
9
Before installing the piston pin clip, cover the
crankcase with a clean rag to prevent the pis-
ton pin clip from falling into the crankcase cavi-
ty.
c C
Do not allow the clip open ends to meet the
piston pin slot
b b
.
5NY-9-30-4B 5/23/01 8:48 PM Page 20