Namura .020 Over Bore Top End Repair Kit for Sea-Doo 650 1993-1996 Models 78.5mm

.020 Over Bore Top End Repair Kit for Sea-Doo 650

This Namura .020 Over Bore Top End Repair Kit (78.5mm) provides pistons, rings, cylinders, and gaskets for rebuilding the top end on Sea-Doo 650 models from 1993 to 1996.

Overview

The Namura .020 Over Bore Top End Repair Kit (78.5mm) is designed for Sea-Doo 650 engines that have been bored oversize. It includes matching pistons, rings, and gaskets to restore compression and performance in 1993-1996 models.

Built For Performance

• Oversized 78.5mm pistons for .020 over bore applications
• High-strength cast pistons with premium ring sets
• Complete gasket set for a leak-free seal
• Precision-machined cylinders for exact fitment
• All necessary hardware included

Fits These Machines

• for Sea-Doo 650 (1993-1996)

On-The-Job Use

• Rebuilding Sea-Doo 650 engines after cylinder boring
• Restoring compression on high-hour watercraft
• Installing a .020 over bore kit for increased displacement
• Performing a top end rebuild with oversize pistons

Specs At A Glance

Good To Know

Q: Why choose a .020 over bore kit? A: A .020 over bore is common when the original cylinder is worn beyond standard limits; this kit provides the correct oversized pistons and rings to match the bored cylinders.

Q: Do I need to have my cylinders bored before installing? A: Yes, cylinders must be bored to 78.5mm by a machine shop to accept these oversized pistons. The kit does not include pre-bored cylinders.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.