Check the listing for details. SeaDoo 717 720 Top End Rebuild Piston Gasket Kit HX SP SPX GSI GTI GTS GS. Condition: New. Listed at 170.27 USD. Top End Kit: 010-817-10_STD 82MM Bore. Fits: SEA-DOO 717/720. Made to exact OEM specifications. Top End Kits Include: Pistons, Rings, Wrist Pins, Circlips, Top End Bearings, Head, Base, Common Intake and Exhaust Gaskets required for rebuilding the top end of the motor. **Prior to placing your order please measure your cylinders to determine the appropriate size required. Most pistons come in .25mm increments from stock or standard bore up to 1mm oversize. Refer to your shop service manual for guidance on the procedure or have the cylinders evaluated by a qualified machine shop**.Top End Kit: 010-817-10_STD 82MM Bore. Fits: SEA-DOO 717/720. Made to exact OEM specifications. Top End Kits Include: Pistons, Rings, Wrist Pins, Circlips, Top End Bearings, Head, Base, Common Intake and Exhaust Gaskets required for rebuilding the top end of the motor. **Prior to placing your order please measure your cylinders to determine the appropriate size required. Most pistons come in .25mm increments from stock or standard bore up to 1mm oversize. Refer to your shop service manual for guidance on the procedure or have the cylinders evaluated by a qualified machine shop**.