9.2 Inspection
● Valve spring length
●Valve seat width
●Cylinder cover
Remove all accumulated carbon in burning room and the washer remains on cylinder cover, and then
check for crack of spark plug holes, valve base and valve conduct pipe.
Check for distortion of cylinder cover with ruler and feeler gauge.
Service limit
If exceed 0.1mm,please replace
●External diameter of valve rod
Standard (mm)
Service limit (mm)
Air intake 6.570~5.48 6.50
Air outlet 6.55~6.57 6.50