KYMCO XCITING S 400 Manual page 118

3. Engine > Valves
Inspect the valve seat and the valve seat width. The valve seat should
be centered on the valve face. If the seat is pitted, worn out, or fits
poorly on the valve face the valve seat must be resurfaced.
Valve seat width
Measure the inside diameter of the valve guides. Replace the guides if
the measurement is out of specification. Calculate the valve stem-to-
guide clearance. Replace the guide and valve if the clearance is out of
specification
Item
IN
EX
Standard (mm)
1.7±0.1
1.7±0.1
3‐40
XCITING 400i