DAELIM NS125III - SERVICE, Service Manual

Page: 104 / 203

Cylinder Head/Valve
●
After adjustment, apply compound evenly to the
valve seat and set the valve with a valve guide
reamer.
NOTE
Cylinder Head Assembly
●
Assemble the valve spring seat and new stem seal.
● Apply molybdenum grease to the valve stem.
Turn valve slowly and insert it into the guide,
taking precautions not to damage the stem seal.
●
Verify that valve is moving up and down
smoothly.
● Assemble the spring with its narrow side pitch
facing the cylinder head.
● Assemble the spring retainer.
● Compress the valve spring and install the valve
cotter.
NOTE
Tool: Valve spring compressor
9-11
Do not excessively press and turn the valve to set it as
it may cause damage. Gently strike and set the valve.
The seat surface may become worn on one side if the
valve is set in the same position. Turn the valve
slightly when setting it.
Take precautions not to allow compound to get into
the clearance between the stem and guide while the
valve is being set.
Do not compress the valve spring more than
necessary.
Valve
Spring
Cotter
Retainer
Stem seal
Valve spring compressor
Narrow side