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Table of Contents
126
MAINTENANCE-
ENGINE
Table H23
Valve Installed Height
MEASUREMENT
PROBABLE CAUSE
RECOMMENDATION
1. Move valve to deeper cut
seat. Remeasure.
Less than 37.34 mm
Valve stem
2. Gring valve face to drop it
previously ground
farther
into
seat. Remeasure.
3.
Rep lace valve.
Remeasure.
37.35-38.52 mm
Normal acceptable
1. Move valve to
shallower
cut
Wear or valve face and
seat. Remeasure.
38.53-38.72 mm
seat grounding have drop-
2. Gring 0.2 mm maximum
off
ped valve too far into
seat.
valve stem.
See CAUTION,
Pg.
123.
Remeasure.
Valve
1.
Replace valve.
Remeasure.
face or seat worn
More th an 3
8.
73 mm
2. Replace cylinder
head.
Re-
out or ground excessive! y.
measure.
Valve Springs
Spring tension
Remove the 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
lim
it,
replace
the
spring.
Valve
Spring
Tension Measurement
Table H24
Valve
Spring
Tension
Length
Standard
Service Lim it
Inner
25.2 mm
29.1-33.9 kg
19.7 kg
Outer
27.2 mm
51.5-60.5 kg
36.4 kg
Squareness
Measure
the
squareness of each spring by standing
each end on a surface plate and setting a square against
it. Replace any spring for which the distance between
the top of
the
spring and the square
is
greater than
the
service limit.
Valve Spring Squareness
/
/
.
I
_
within
1 .5
mm
Table H25
Valve Spring Squareness
I
Standard
Service Limi
t
( under 1.0 mm
1.5 mm
Oil Seals
/
The oil seal around each
valve
stem prevents oil
from
leaking down
into
the combustion
chamber.
If an
oil
seal is damaged or deteriorated, oil consumption will
increase, and carbon may build
up
in the combustion
chambers.
This may be
indicated
by white exhaust
smoke.
If an
oil
seal appears damaged or deteriorated or
if
there
is
any doubt as to its condition, replace
it
with
a new
one.

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   Also See for Kawasaki Z250 1981

This manual is also suitable for:

Kz350 1981

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