Valve/Cylinder Block Disassembly And Assembly; Combustion Chamber Cleaning - Honda BF2D Series Manual

3. VALVE/CYLINDER BLOCK
a.
DISASSEMBLY/REASSEMBLY
[6]
[1]
INLET VALVE
REASSEMBLY:
• Remove carbon deposits
before installation.
• Check the valve head for
damage.
• Do not interchange with
the exhaust valve.
VALVE HEAD DIAMETER:
IN: 17.5 mm
EX: 15.5 mm
INSPECTION: P. 11-9
CYLINDER BLOCK
I
INSPECTION: P. 11-6
I
[5]
VALVE STEM SEAL
(IN SIDE ONLY)
[2]
EXHAUST VALVE
RE~SSEMBLY:
• Remove carbon deposits
before installation.
• Check the valve head for
damage.
INSPECTION: P. 11-9
b. COMBUSTION CHAMBER CLEANING
[5
~OL)
[1]
(3]
H:OlVD.A
BF2D
VALVE SPRING RETAINER (2)
DISASSEMBLY:
Push down and slide the retainer to the
side, so the valve stem slips through
the hole at the side of the retainer.
[3]-1
VALVE SPRING RETAINER
REASSEMBLY:
Install the valve spring retainer while
holding the valve with the handle of a
driver or hammer.
[4]
VALVE SPRING (2)
I
INSPECTION: P. 11-9
I
CAUTION
• Be sure to insert a thick paper into the cylinder to
protect the inner wall of the cylinder during cleaning.
CLEANING BRUSH
07998 - VA20100
• Do not press the cleaning brush with force against
the combustion chamber.
1) Prepare a protective lining of thick paper or equivalent
material, with a diameter large enough to fit against the
inner wall of the cylinder, and insert it into the cylinder.
2) Attach a cleaning brush to an electric drill and clean the
combustion chamber.
[2]
ELECTRIC DRILL
11-5
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