How to setting cylinder ring piston 4Hp engine

The seller is masteda-parts and is located in this country DE. Engine 2l, 80kw, 110hp, Petrol (code NE). 4x goetze engine engine piston ring set 08-206600-00 p std new oe replacement. Engine 2l, 55kw, 75hp, Petrol (code 4RC).