Wiseco 1982P214-C Thin Dome Piston Kit - 2.7765" Bore .540" Pin - Modified ClassPrecision Racing Go Kart Engine Parts for Maximum Output When you're pushing the limits of your modified class motor, standard racing go kart engine parts won't cut ityou need the precision of the Wiseco 1982P214 C thin dome piston kit to maximize combustion efficiency. At a massive 2. 7765 inch bore, this oversize piston floods your cylinders with an optimized air fuel mixture, translating into aggressive thrust that pins you to your seat. The . 540