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Cylinder Wear Inspection; Piston Diameter Measurement - Kawasaki KX125 1990 Service Manual

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4-14 ENGINE TOP ENO
-
Fit
a
new
piston
pin
snap ri ng into
the
side of the
piston
so that
the ring
opening does not coincide
with
the notch in the edge
of the piston
pin
hole.
A
.
Arrow
C.
Ring
Opening
B.
Snap Ring
D.
Notch
Cylinder Wesr
Inspection
NOTE
oMeasu
re
the cylinder inside diameter when
the
cylinder is
cold
(room or ambient temperature).
-
Inspect
the
inside of
the
cylinder for
scratches
and
abnormal
wear.
*
If
the
cylinder
is
damaged
or badly worn,
replace
it
with
a
new
one.
-
Since
there
is
a difference in
cylinder
wear
in
different directions, take a
side-to-side
and a
front-
to-back
measurement shown
in
the
figure.
*
If
any of the cylinder inside
'
diameter measure-
ments exceeds
the
service
limit, the
cylinder
must
be
replaced
with
a
new
one
since the ELECTRO-
fUS ION cylinder
cannot
be bored or
honed.
CyInder
Inside Diameter Measurement
®
:
KX125 -
18 mm
KX250
- 30
mm
Cylinder
InskSe Diameter
10(126,
Standard:
56.020-56
.035mm.
and less
than
O.Olmm difference
between
any
two
meast.r8ments.
SetvIce Umit,
56.1Omm,
Of
more
than
O.05mm
diffefence between any two
measurements.
KX250,
Standard,
67 .400
-
67 .415mm. and less
than
O.Olmm difference
between
any two
I1"Ie8SW8ments.
Servtce
Umit:
67 .48mm.
Of
more
than
O.05mm
dlffefence between any two
measments.
Piston Diameter Measurement
Measure
tile
outside
diameter
of the
piston
16
mm
(KX125) or
20.5
mm
(KX250)
up
from
the
bottom
of
the
piston
at a right angle to
the
direction of
the
piston
pin.
*
If
the
measurement is
under the
service
limit re-
place
the
piston.
PIston
Diameter
10(125,
Standard,
SetvIce
Umit,
10(260,
Standard,
Service
Umtt:
65.935-65.960 nvn
55.79 mm
67
.336-
67 .351 mm
67.23 mm
Piston
Obimeter Measurement
®
'
KX125
-
16
mm
KX250 -
20.5
mm
c,..<J.-+
®

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