Piston nigikorwa cyo gusubiranamo mumubiri wa silinderi ya moteri yimodoka. Imiterere yibanze ya piston irashobora kugabanwa hejuru, umutwe hamwe nijipo. Hejuru ya piston nigice cyingenzi cyicyumba cyaka, kandi imiterere yacyo ifitanye isano nuburyo bwatoranijwe bwo gutwika. Moteri ya lisansi ahanini ikoresha piston yo hejuru, ifite ibyiza byahantu hato hashyirwa ubushyuhe. Diesel moteri piston hejuru akenshi ifite ibyobo bitandukanye, imiterere yihariye, umwanya nubunini bigomba kuba hamwe na moteri ya mazutu ivanze hamwe nibisabwa byo gutwikwa.