Honda WB20XT2 Manual page 110

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WB20XT2•WB30XT2
Lap the valves into their seats, using a commercially
available valve lapper and lapping compound.
After lapping, wash all residual compound off the
cylinder head and valve.
• Do not push the valve against the seat with force
during lapping. Apply a light pass with the valve
lapper.
• Avoid lapping the valve in the same position as it
causes uneven wear. Lap the valve by turning the
lapper slowly.
• Take care not to allow the lapping compound to
enter the gap between the stem and guide.
CYLINDER HEAD
VALVE LAPPER
(Commercially available)
12-11