DAELIM ET-250 Service Manual page 45

Remove the 2 cylinder head mounting bolts from
cylinder head right side, and then remove 4 nuts and
washers from cylinder head upper side.
Remove the cylinder head.
Remove cylinder head gasket and 2 dowel pins.
Remove chain guide.
Clean up residues from the matching surfaces of
cylinder and cylinder head.
Caution
Ÿ Do not damage the matching surfaces of
cylinder and cylinder head.
Ÿ Avoid residues of gasket or foreign materials
falling into crankcase as cleaning.
Use a valve cotter remove & assembly tool to press
the valve spring, and then remove valves.
Caution
Ÿ In order to avoid loosing spring elasticity, do
not press the spring too much. Thus, press
length is based on the valve cotter in which can
be removed.
Special Service Tool:
Valve cotter remove & assembly tool
2 bolts
Chain guide
Valve cotter remove
and assembly tool
Inner spring
Inlet valve
Exhaust valve Outer spring
4 Nuts
Gasket
Dowel pins
Spring retainer
Cotter