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Using a
60
0
interior cutter, remove 114 of the exist-
ing
valve seat
material.
TOOLS
:
Interior
cutter.
34 mm (IN
)
Interi or
cutter,
30 mm
(EX)
Cutter
holder,
5.5
mm
07780-0014700
07780-0014000
07781-0010101
or equivalent commercially
available
in U
.S.A.
Using
a
45°
seat cutter, cut the seat to the proper
width.
VALVE SEAT WIDTH
:
1.0
-
1.1 mm (0.039
-
0.043
in
)
Make
su re
that
all pitting and irregularities are
removed.
Excessive
lappmg
After cutting
the
seat, apply lapping compound to
pressure
may
the
valve
face,
and
lap
the
valve using light
pres-
deform or damage
sure.
the seal.
Change the
angle
of
lapping
tool frequently to pre-
vent uneven seat wear.
Do
not
allow
After lapping
,
wash
any
residual compound off
the
lapping
compound
cylinder
head
and valve and
recheck the
seat con-
to enter rhe guides
t
act.
CAMSHAFT REMOVAL
Remove the cylinder head
(page
8-8).
Remove
the cam chain tensioner lifter sealing bolt
and sealing
washer.
CYLINDER HEADIV ALVE/CAMSHAFT
~EATWIDTH
,
~
---6-
<
L~
-
~EATWIDTH
----------'
45°L
8-15
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