2-12
5
）
Remove the intake/exhaust valve. Check them for serious wear. Replace them
if necessary.
6
）
Measure the margin and face of valve. If any one of the values is beyond the
service limit, replace the valve.
Face angle: 45°
Margin: 1.6mm
Measure the diameter of valve stem. If it is beyond the service limit, replace the
valve.
Service limit:
＜
Φ
4.95mm
7
）
Measure the free length of the spring. If it is beyond the service limit (outer:
＜
36mm inner:
＜
34 mm
）
, replace the spring with a new one.
NOTE: The loose wound coils face upward when installing the springs.
INTAKE VALVE
EXHAUST VALVE
