Combustion Chamber Cleaning - Honda GX240RT2 Service And Repair Manual

Hold the rocker arm pivot (1) and loosen the pivot
adjusting nut (2).
Turn the rocker arm pivot to obtain the specified
clearance.
VALVE CLEARANCE:
IN: 0.15 ± 0.02 mm
EX: 0.20 ± 0.02 mm
Hold the rocker arm pivot and retighten the pivot
adjusting nut to the specified torque.
TORQUE: 10 N·m (1.0 kgf·m, 7 lbf·ft)
Recheck the valve clearance, and if necessary, readjust
the clearance.
Check the head cover packing for damage or
deterioration, and install it to the head cover.
Attach the cylinder head cover to the cylinder head, and
tighten the head cover bolt securely.

COMBUSTION CHAMBER CLEANING

Remove the cylinder head
Attach a soft wire brush to an electric drill and clean any
carbon deposits from the combustion chamber.
Do not remove the valves from the cylinder head when
cleaning the combustion chamber; this could damage
the valve seats.
Do not press the wire brush with force against the
combustion chamber; this could damage the cylinder
head.
gx240ut2_gx270ut2_gx340ut2_gx390ut2
(page 12-3 ).
VALVE STEM
(2)
To increase valve clearance: screw out.
To decrease valve clearance: screw in.
MAINTENANCE
(2)
(1)