TGB BLADE 425 Service Manual page 76

6. CYLINDER HEAD/VALVE
Remove the 4 cylinder head mounting bolts from
cylinder head right side, and then remove 4 bolts
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
● Do not damage the matching surfaces of
cylinder and cylinder head.
● 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
● 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
6-6
To this chapter contents
4 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