Valves - Yamaha SZR 660 Service Manual

ENGINE DISASSEMBLY
3.
Remove:
Rocker arm
shaft
•
Rocker arm
NOTE:
ENG
%m
Remove
the rocker
arm
shaft by the slide
hammer
bolt (1)
and
weight
(2).
Slide
hammer
set:
P/N
YU-01083-A
Slide
hammer
bolt;
P/N
90890-01083
Weight:
P/N
90890-01084
III
ENGINE
DISASSEMBLY
ENG
<*)JP
2.
Remove:
• Valve
cotters
(1)
NOTE:
Remove
the valve cotters while compressing the
valve spring with the vaive spring compressor-
Valve spring compressor:
P/N YM-04019, 90890-04019
VALVES
NOTE:
Before removing the
internal
parts
(valve,
valve
spring,
valve
seat,
etc.)
of the cylinder
head,
the
valve sealing should be checked.
1.
Check:
• Valve
sealing
Leakage
at
valve seat -> Inspect
the
valve
face, valve seat
and valve seat
width.
Refer to the
"INSPECTION
ANO REPAIR
-VALVE SEAT"
section.
"1
j
*
cry
V)
^J^
-<2)
3.
Remove:
•
Valve retainer
(1)
•
Valve
spring
(2)
•
Valve
(3)
• Oil seal
(4)
• Spring seat
(5)
NOTE:
„_
_
Identify
each
part position
very
carefully
so
that
it
can be
reinstalled
in its
original place-
Checking
steps:
• Pour a clean
solvent
(1) into
the intake
and
exhaust
ports.
Check
the valve sealing.
There
should
be no
leakage
at
the valve seat
(2).
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