KYMCO K-XCT 300i Owner's Manual page 187

3. Engine > Valves
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
Valve guide I.D
Valve stem-to-guide clearance
Item
IN
EX
Item
Standard (mm)
1.2
1.2
Standard (mm)
IN 5.00 - 5.012
EX 5.00 - 5.012
IN
0.010 - 0.037
0.030 - 0.057
EX
3-43
K- XCT 300i