KYMCO XCITING S 400 Manual page 97

3. Engine > Camshaft
The piston should now be at TDC on the compression stroke.
You can make sure that it is on the compression stroke by
checking that there is some slack in the rocker arms. If the
rocker arms are rigid, rotate the crankshaft 360° clockwise until
the "T" mark is once again aligned with the notch on the case
cover.
The cam chain tensioner is located on the back of the cylinder.
3‐19
XCITING 400i