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If the measurement exceeds the service limit replace
the crankshaft assembly.
Connecting Rod Twist Measurement
I
- •
_
__
1
_0
_
0 m ~m
.:..c_
_ _ ____,.
Table H37
Connecting Rod Bend, Twist/100 mm
Standard
Service Limit
Bend
under 0.05 mm
0.2mm
Twist
under 0.05 mm
0.2 mm
Crankshaft runout
With the four crankshaft bearings in place, set the
crankshaft
in
V blocks, suspending it at the both
inner
bearing outer races.
Set a dial gauge against each of the other bearings
and turn the crankshaft slowly.
The
difference between
the
highest
and lowest dial gauge reading for
the
bearing
is the runout.
If the runout measured at any bearing exceeds the
service
limit,
the
crankshaft should be
replaced.
A.
Dial Gauge
B. Crankshaft Bearings
Table
H38
Crankshaft Runout
Standard
Service Limit
under 0.04 mm
0.10 mm
MAINTENANCE-ENGINE 131
Main bearing wear
The
crankshaft bearings
are
made
to
very
close
toler-
ance, and bearing play
wou
ld
be difficult to measure
even if all
the
bearings could be
removed.
The worth
of the bearing, therefore, must be judged by
feel.
Wash
the
bearings in a
high flash-point
solvent, blow
them
dry (DO NOT SPIN THEM), and
lubricate
them.
Turn each bearing over by hand and see that
it
makes
no
noise, turns smoothly, and
has no
rough spots. If
either of the two end bearings
is
defective,
the
bearing
can be replaced, but the other
two
bearings can
be
replaced only as an assembly with the crankshaft.
CLUTCH
Spring tension
Remove the clutch springs, and set
them,
one at a
time, on a spring tension testing device.
Compress
the
·spring, and
read
the tension
at the
test length
.
If the spring tension at
the
specified
length
is
weaker
than the
service limit,
replace
the spring.
Table H39,
Clutch Spring Tension
Length
Standard
Service Limit
24mm
14.4-17.6
kg
13 kg
Friction plate wear, damage
Visually inspect
the friction plates to see whether
or
not
they show any signs of seizure, overheating, or un·
even wear.
Measure the thickness of
the
plates
with
vernier
calipers.
If any plates show signs of
damage,
or
if
they
have
worn past
the
service limit, replace
them
with new ones.
Table H40
Friction Plate Thickness
Standard
Service
Limit
2.92-3.08
mm
2.7 mm
Clutch plate wear
Place each clutch plate on a surface plate, and meas-
ure the gap between each clutch plate and
the
surface

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   Also See for Kawasaki Z250 1981

This manual is also suitable for:

Kz350 1981

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