ADLY MOTO
7-5
CYLINDER HEAD, VALVE
Check cylinder head
x
Check the hole of spark plug and valve guide
to see if it’s damaged.
Check valve spring free length
Working limit:
Outer spring: Replace under 39.8 mm
Inner spring: Replace under 37.8 mm
Check valve and valve guide
x
Check valve to see if it’s burned or banded.
x
Check the movement between valve and
guide is smooth or not.
Valve outside diameter working limit:
Replace under 5.45 mm
Valve guide inside cylinder head working
limit:
Replace if over 5.53 mm
Cylinder head assembly
x
Install valve seal, spring seat
x
x
Install valve into cylinder head with some
lubrication oil on seal and spring seat
x
Install springs, spring holder, cotter and use
special tool to assembly.
Valve spring holder tool
Κ
TLH3-03
x
Use rubber hammer hit the valve top for
2 ~ 3 times to have better contact between
valve and cotter.
Note
Κ
ϡ
ʳ
Install new valve seal after removed.
Note
Κ
ϡ
ʳ
Must use the special tool.
ϡ
ʳ
Valve cotter sharp edge face toward
cylinder head bottom.
special
