Installing The Cylinder - Yamaha YFM660FP Service Manual

CYLINDER AND PISTON
2.Position:
Top ring
●
2nd ring
●
Oil ring
●
Offset the piston ring end gaps as shown.
a Top ring end
b Oil ring end (lower)
c Oil ring end (upper)
d 2nd ring end
3.Install:
Piston 1
●
Piston pin 2
●
Piston pin clips 3
●
NOTE:
Apply engine oil onto the piston pin, piston
●
ring and piston.
Be sure that the arrow mark a on the piston
●
points to the exhaust side of the engine.
Before installing the piston pin clip, cover the
●
crankcase with a clean rag to prevent the
piston pin clip from falling into the crankcase.
4.Lubricate:
Piston
●
Piston rings
●
Cylinder
●
NOTE:
Apply a liberal coating of engine oil.

INSTALLING THE CYLINDER

1.Install:
Cylinder
●
O-ring
New
●
Bolts (M10)
●
Bolts (M6)
●
NOTE:
Install the cylinder with one hand while com-
pressing the piston rings with the other hand.
CAUTION:
Be careful not to damage the timing chain
●
damper during installation.
Pass the timing chain through the timing
●
chain cavity.
4 - 37
ENG
New
42 Nm (4.2 m • kg, 30 ft • lb)
10 Nm (1.0 m • kg, 7.2 ft • lb)