Cylinder Head Inspection; Solvent Test; Warpage Inspection - Honda Motorcycle Service Manual

CYLINDER HEAD
CYLINDER HEAD INSPECTION
SOLVENT TEST
Remove the cylinder head (refer to the Model Specific
manual).
Place the cylinder head with the intade port facing up as
shown. Pour kerosene into the intake port.
Wait for a few minutes, then chick the valve area on the
combustion chamber side for kerosene leakage.
With the exhaust port facing up, pour the kerosene into the
port as shown. Wait for a few minutes, then check the valve
area on the combustion chamber for kerosene leakage.
If kerosene leaks from around the valve, it indicates faulty
sealing of the valve seat. Remove the valve from the cylinder
haea and check the following:
Valve seat for damage (page 9-1 1)
Valve seat contact face (page 9-1 1)
Valve stem for bending or damage (page 9-8)
WARPAGE INSPECTION
Remove carbon deposits from the combustion chamber and
clean off the head gasket surfaces.
NOTE
.
Gaskets will come off easier If soaked in high flash-point
cleaning solvent.
CAUTION
Avoid damaging the gasket and valve seat surfaces.
Check the spark plug hole and valve areas for cracks
Check the cylinder head for warpage with a straight edge and
feeler gauge.
Repair or replace the cylinder head if warpage exceeds the ser-
vice limit. (Refer to the Model Specific manual)
COMBOSTON
CHAMBER
STRAIGHT EDGE
Date of Issue: March, 1995
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