KYMCO ZX Service Manual page 40

3
. LUBRICATION SYSTEM Air Cleaner
Wash the air cleaner element in detergent oil,
squeeze out and allow to dry.
*
Never use gasoline or organic vaporable
oil with acid or alkali for washing.
After washing, soak the element in clean engine
oil SAE 15W-40# and squeeze out excess oil.
Reinstall the element.
«Cylinder Compression»
*
Warm up the engine before compression
test.
Remove the spark plug and insert a
compression gauge.
Open the throttle valve fully and push the
starter button for 7 8 seconds to test the
compression.
Compression:
11.5kg/cm²
If the compression is low, check for the
following:
• Leaking cylinder head gasket
• Worn piston/cylinder
If the compression is high, it indicates that
carbon deposits have accumulated on the
3-9
combustion chamber and the piston head.
LUBRICATION SYSTEM
«Oil Filter Cleaning»
Disconnect the oil tube at the oil pump side and
allow oil to drain into a clean container.
Remove the tube clip at the oil tank side and
disconnect the oil tube.
Remove the oil filter.
Squeeze out
Wash
and dry
Squeeze out
Soak in oil
excess oil
dry