4-2
CYLINDER
HEAD
Alumin’um die-cast made cylinder head has semi-
sphere shaped combustion chamber
for
optimal
combustion and higher efficiency.
49
CRANKSHAFT
AND CONNECTING
ROD
Forged steel crankshaft assembled with hardened
crank
pin
and
connecting rod, precision balanced
for low engine vibration, durability, greater shock
loading resistance
and
longer life. Needle bearings
are implemented
on
both
ends
of
the connecting
rod.
As
these
parts
are
press-fitted together
by
special
jig
and
are
unable to be disassembled,
crankshaft assembly
needs
to
be serviced
in
case
crankshaft
or
connecting rod need to be replaced.
4-4
PISTON
AND
PISTON
RINGS
High strength aluminum alloy made
piston
equips
two
piston rings.
To
avoid piston ring rotation,
knocks are pressed
in
piston ring grooves.
Top
ring is key-stone type and is chromium plated.
Second ring is a plain type and
is
parkerlized.
1
Fig.
4-2
fig.
4-3
Top
ring
Key stone
type
Chromium
plated
Plain
type
Parkerlrized
-5-
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