Vito's are a bad idea. I ride with a group of 11 Banshees and we all use regular Wiseco pistons. Vito's are Wiseco but the skirt are shorter. I've seen the skirts break over and over. Best way is bore it, wiseco pistons and a vito's base gasket(one full gasket, not two seperate ones). Klotz oils burn dirty. All of us run Castor 927 @ 32:1 with no problems.