rotax max big bore kit?

My 58mm piston may fit, here are some dimensions. The pin size is 15mm, the max. rod width is 20.5mm The overall lenth is 58mm. The timing height measured from the top of the pin hole to the edge of the crown is 21mm. The ring is pinned on the centerline of the intake port.
Is this the kart engine with the removable liner? If so you can send just the liner to us for boring and plating. That liner is so stiff that we can hone it to size and it won't change after you thermally fit it.