Hisun HS500ATV-2 Maintenance Manual page 25

whether the cylinder head is out of shape. Examine the
flatness of cylinder head by flat or knife edge gauge and
clearance gauge .
Repairing limit value: 0.05mm.See figure 2-21
Figure 2-21
2．Remove and examine the width of valve .
Repairing limit value: 2.0mm.See figure 2-21-1 ,2-21-2,
2-21-3.
If the mating surfaces is coarse, corrode or cannot contact
with valve seat normally. repalce it.
Figure 2-21-1 Figure 2-21-2
25