Sea-Doo › Sea-Doo 900 Top End Rebuild Kit (1mm Over, 75mm) Image 1 of 1 Sea-Doo 900 Top End Rebuild Kit (1mm Over, 75mm) $565.43 Full rebuild solution for heavily worn cylinders requiring 1mm overbore. Built for durability and performance. Add To Cart Added! Full rebuild solution for heavily worn cylinders requiring 1mm overbore. Built for durability and performance. You Might Also Like Sea-Doo 900 Top End Rebuild Kit (Standard 74mm) $565.43 Sea-Doo 1503/1630 4-Tec Top End Rebuild Kit (100.96mm) $546.83 Sea-Doo 580 Top End Rebuild Kit (Standard Platinum, 76mm) $258.46 Sea-Doo 1503 4-Tec Top End Rebuild Kit (.5mm Over) $546.83 Sea-Doo 1503 4-Tec Top End Rebuild Kit (1mm Over) $745.71