KYMCO AHG5 Service Manual page 124

7. CYLINDER/ PISTON
DT X360
Install the top and second rings with their markings facing up. Install the rings to the piston
as shown above so that no ring end gaps line up with the piston pin or perpendicular to the
piston pin. The rings should turn easily on the piston without sticking or roughness.
Install the oil expander ring so that the ends are not overlapping. Install the steel rails above
and below the oil ring.
Lubricate the piston pin and the small end of the connecting rod with fresh engine oil.
The "IN" mark should face the intake side (rear) of the engine.
7-16