7-6
CYLINDER HEAD, VALVE
•
Clean carbon material inside
combustion
chamber.
•
Clean gasket material stick on cylinder
head surface.
Check cylinder head
Check the hole of spark plug and valve
guide to see if it’s damaged.
Check valve spring
Working limit:
Outer spring: Replace under 34.1mm
Inner spring: Replace under 31.2mm
Check valve and valve guide
Check valve to see if it’s burned or
banded.
Check the movement between valve and
guide is smooth or not.
Valve outside diameter working limit:
Replace under 4.9 mm
Cylinder head assembly
•
Install valve seal, spring seat
•
Install valve into cylinder head with
some grease on seal, spring seat
•
Install springs, spring holder, cotter
and use special tool to assembly.
special
Valve spring holder tool: TLCT125-02
Attention
：
＊
Beware not to damage the contact
surface of cylinder head
＊
Install new valve seal after removed.
＊
Must use the special tool.
＊
Valve cotter sharp edge face toward
cylinder head bottom.
