Cylinder Head Disassembly - KYMCO Zing 125 Service Manual

6. CYLINDER HEAD/VALVES

CYLINDER HEAD DISASSEMBLY

Remove the valve spring cotters, retainers,
springs, spring seats, washers and valve stem
seals using a valve spring compressor.
＊ ＊ ＊ ＊
• Be sure to compress the valve springs
with a valve spring compressor.
• Mark all disassembled parts to ensure
correct reassembly.
Special
Valve Spring Compressor
Valve Spring Compressor Attachment
Remove carbon deposits from the
combustion chamber and exhaust port.
Clean off any gasket material from the
cylinder head mating surface.
＊ ＊ ＊ ＊
Be careful not to damage the cylinder
head mating surface.
INSPECTION
CYLINDER HEAD
Check the spark plug hole and valve areas
for cracks.
Check the cylinder head for warpage with a
straight edge and feeler gauge.
Service Limit: 0.1mm repair or replace if
over
VALVE SPRING FREE LENGTH
Measure the free length of the inner and
outer valve springs.
Service Limits:
Inner spring : 33.5mm
Outer spring : 40.9mm
6-5
Valve Spring Compressor
Combustion Chamber
Outer Spring
Exhaust Port
Inner Spring