Order
13
14
15
16
Item
Cylinder head
Breather
Intake and ex-
haust valves
Main bearing
cover
Procedure Remarks
Tool
(1)
Remove spark plug. 19 mm plug wrench
(2) Remove cylinder head.
14
mm box wrench
(1)
Remove breather cover.
(2)
Remove breather plate.
Be careful
of
gaskets.
(1) Remove tappet cover.
I
Intake and exhaust
..
(2)
Using
a
valve spring retainer, remove
"
valves use the same
valve spring, retainer,
and retainer lock, but
retainer lock from valve stem.
(3) Remove intake and exhaust valves. in case of reusing
(See
Fig.
18.)
them, reassemble
(4)
Remove spring retainers and valve springs.
fore.
them exactly as be-
10
mm
box wrench
10
mm
box wrench
Valve spring retainer
(1)
Remove bolts.
.Be
careful
not
to
12
mm
box
wrench
(2)
Remove main bearing cover by lightly tap-
damage Oil
with
PTO
shaft
keyway.
.Be careful
not
to
lose crankshaft
and camshaft
adjusting spacers.
ping its side with a plastic hammer.
(See Fig. 19.)
I
I
Fig.
18
/"-
I
Main Bearing Cover
,'
Fig.
19
-
16-
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