Piston Ring And Piston - Yamaha YZ125(V) Owner's Service Manual

CYLINDER HEAD, CYLINDER AND PISTON
EC475280

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.
cC
9When installing the piston pin clip, use
the hand so that it may not be distorted.
9Do not allow the clip open ends to meet
the piston pin slot b.
4-27
ENG