Cylinder Head Assembly - Honda CRF450X 2005 Service Manual

INTAKE SIDE:
After refacing, wash the cylinder head and valve.
I
NOTICE
I
•
Do not lap the imake valves. They are titanium
and have a thin oxide coating. Lapping will dam-
age this coating.
• Use only new intake valves.
EXHAUST SIDE:
After cutting the exhaust seats, apply lapping com-
pound to the exhaust valve face, and lap the
exhaust valve using light pressure.
After lapping, wash any residual compound off the
cylinder head and valve.
I
NOTICE
I
• Excessive lapping pressure may deform or dam-
age the seat.
• Change the sngle of the lapping tool frequently
to prevent uneven seat wear.
• Do not allow any lapping compound to enter the
guides.
CYLINDER HEAD ASSEMBLY
VALVE COnERS
~
SPRIN G RETAINER
SPRING - - . \ SPRING SEAT
tI
~
STEM SEAL
~
VALVE GUIDE - - - ,
WATER HOSE JOINT
CYLINDER HEADIVALVES
~
INTAKE VALVE
7~--_=-l
EXHAUST VALVE
9-33