I bought a used big bore top end kit and everything is absolutely perfect, shiny, and you can still see the cross hatching. But, there is damage to the top of one of the pistons. Not sure how it happend, but I need to get a new one. Anyway, they are 68.50mm bore. The cylinders appear to be stockers sleeved with a Vito's 404 kit or something. They are the cast pistons for this kit, not the Wiesco forged pistons custom made for the kit. Anyway, does anyone know what other 68mm big bore pistons would be safe to use for this kit? Vito's wants $63 plus shipping per piston w/rings and $20 for a set of rings. I was gonna buy a single piston/rings for 1 cylinder, and another set of rings for the other cylinder. I was also gonna buy a jet kit from vito's, which would cost me $50. I of course would need a top end gasket set ($30?). If I can find a cheaper set of rings and pistons than the ones from Vito's I would gladly buy those instead.