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Workshop manual
Disassembly / reassembly
Valve spring retainer (2)
Disassembly:
Push
retainer and move the retainer to the small
hole so that the valve stem slips through
the small hole.
The exhaust valve retainer has a larger
groove than the intake valve retainer so
that it can accept the valve rotator.
Caution: don't disassemble the valve spring
while the cylinder cover is not removed, or
the valve stem will drop into the combustion
chamber.
Valve rotator (2)
Be sure to assemble.
If
the
engine
is
operated with the
rotator not attached,
the valve will drop
into cylinder.
Adjust
nut (2)
Lock nut
Rocker arm (2)
Torque: 10 Nm
Assembly:
contacting face of rocker
with adjust nut and push rod
for
assembling.
Valve spring free length
Measure the free length of the valve springs.
Standard
30.5 mm
Replace the springs if they shorter than the service limit.
down
the
spring
Valve spring (2)
Check
the
wearing
before
Service limit
29.5 mm
Cylinder head
Seal guide
Rod guide plate
Valve adjust bolt (2)
Torque: 10 Nm
43
Exhaust valve
Reassembly: Check exhaust
valve taper face for chipping or
excessive
before assembling.
Intake valve
Assembly: Don't
interchange the
exhaust and intake
valves.
Push rod (2)
Assembly: Check the two
ends of the push rod for
wearing and push rod for
straightening. Be sure that
two
ends
of
push
rod
completely seat on the lifter
and rocker seat.
carbon
deposits
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