Products › Sea-Doo 900 Top End Rebuild Kit (.75mm Over, 74.75mm) Image 1 of 1 Sea-Doo 900 Top End Rebuild Kit (.75mm Over, 74.75mm) $565.43 High-quality rebuild kit with .75mm oversize pistons for restoring engine performance and sealing. Add To Cart Added! High-quality rebuild kit with .75mm oversize pistons for restoring engine performance and sealing.