Honda CRF50F 2004-2015 Service Manual page 91

Clean the cylinder head assembly w ith solvent and
blow through all oil passages with compressed air.
Install the valve spri ng seats.
Install new stem seals.
Lubricate the valve stems with engine oil and insert
the valve into the valve guide.
To avoid damage t o the ste m seal, turn the valve
slowly when inserting .
Install the valve spri ngs with the tightly wound coils
facing t he combustion chamber.
Install the valve spring retainers.
To prevent loss of
Install the valve coners using the special tool as
lenSlon, do nor
compress the valve
spnng more than
necessary.
shown .
TOOLS:
Valve spring compressor 07757-0010000
Valve spring compressor attachment
07959-KM30101
Support the cylm-
Tap the valve stems gently w ith two plastic ham-
der head above the
mers as shown to seat the valve coners firmly.
\NOr!:: bench
so
that
the valve heads will
not COflfact any-
thing that cause
damage
Apply engine oil to the rocker arm inner and slipper
surfaces.
Install the rod:er
Install the rocker arms and rocker arm shafts.
arm shaft With Its
threaded end facing
the fight side
CYLINDER HEADIV ALVES
" STEM SEAL
SPRING
\
...
~A~
SPRING SEAT
SPRING COMPRESSOR
7-15