Honda CRF450X 2005 Service Manual page 206

CYLINDER HEADIV ALVES
Blowout all oil passages in the cylinder head with
compressed air.
Install the spring seat and new stem seal.
Lubricate the valve stem sliding surface with molyb-
denum oil solution.
Insert the valves into the guide while turning it
slowly to avoid damage to the stem seal.
Instal l the va lve springs with the tightly wound coils
facing the combustion chamber.
Install the spring retainer.
NOTE:
Do not confuse the intake spring retainers and
exhaust spring retainers. The intake spring retainer
has a flat surface and the exhaust spring retainer
has a chamfered edge.
Gresse IlIecolters
Install the valve coners using the special tools as
to
ease ins/allation.
shown.
To
preV6n1loss of
TOOLS:
16nsion,
do
nor
Valve spring compressor
compress
rhe
valve
Valve spring compressor
spnngs more than attachment
necessary.
NOTE;
07751·0010000
01959·KM30101
Do not confuse the intake cotters and exhaust cot-
ters. The intake cotters are long and exhaust cotters
are short.
9-34
SPRING SEAT
-:7J
VALVE
fI=Z , ;
EXHAUST
VALVE SPR ING
•
IN:
IN:
VALVE SPRING
INTAKE VALVE
•
EX:
,
COTTERS
EX:
00
•