Yamaha Scorpio - Piston Rings, Piston and Cylinder Installation

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ENG
CYLINDER AND PISTON
EB404184
PISTON RINGS, PISTON AND CYLINDER
INSTALLATION
1.Install:
●
Top ring
1
●
2nd ring
2
●
Oil ring
3
NOTE:
●
Make sure to install the piston rings so that
the manufacture’s marks or numbers are
located on the upper side of the rings.
●
Lubricate the pistons and piston rings liber-
ally with engine oil.
2.Install:
●
Piston
1
●
Piston pin
2
●
Piston pin clip
3
NOTE:
●
Apply engine oil onto the piston pins.
The “
→
” mark
a
on the piston must face the
exhaust side of the cylinder.
●
Before installing the piston pin clip, cover the
crankcase opening with a clean rag to pre-
vent the piston pin clip from falling into the
crankcase.
●
Make sure to install each piston in its respec-
tive cylinder.
3.Install:
●
O-ring
●
Gasket (cylinder)
●
Dowel pins
New
New
4.Position:
●
Piston rings
NOTE:
Offset the piston ring end gaps as shown.
a
Top ring end
b
Oil ring end (lower)
c
Oil ring end (upper)
d
2 nd ring end