Suzuki DR600S - Camshaft Inspection and Servicing

3-29 SERVICING ENGINE
e
Install
the
valve
springs,
making
sure
that
the
close-pitch
end
@
of
each
spring
goes
in
first
to
rest
on
the
head.
The
coil
pitch
of
both
the
inner
and
outer
springs
vary:
the
pitch
decreases
from
top
to
bottom,
as
shown
in
the
illustration,
Fit
a
valve
spring
retainer,
compress
the
springs
with
a
valve
spring
compressor
and
fit
the
cotter
halves
to
the
stem
end.
CAMSHAFT
The camshaft should be checked for runout and
also for wear of cams and journals if the engine
has been noted to produce abnormal noise or
vibration or to lack output power. Any of these
malconditions could be caused by a worn camshaft.
CAMSHAFT CAM WEAR
Worn-down cams are often the cause of mistimed
valve operation resulting in reduced output power.
The limit of cam wear is specified for both intake
and exhaust cams in terms of cam height @,
which is to be measured with a micrometer.
Replace the camshaft if found it worn down to the
limit.
Micrometer
09900-20:
kee (25 — 50 mm)
Cam height
Height ©) Service Limit
36.230 mm
Intake cam
(1.4264 in)
36.460 mm
(1.4354 in)
Exhaust cam
Inlet open
(B.T.D.C.)
Exhaust close
(A.T.D.C.)
Inlet close
(A.B.D.C.)
B.D.C.
Exhaust open
(B.B.D.C.)