Namura .020 Over Bore Piston Kit for Sea-Doo 580 PWC 1990-1996 76.5mm SEE LIST

Namura .020 Over Bore Piston Kit for Sea-Doo

This Namura .020 over bore piston kit is a 76.5mm replacement piston assembly designed for Sea-Doo 580 PWC engines from 1990 to 1996.

Overview

The Namura .020 Over Bore Piston Kit provides a precisely machined piston, rings, wrist pin, and circlips for Sea-Doo 580 PWC engines. This 76.5mm oversize piston restores compression and performance when the cylinder is bored to 0.020 over stock. Ideal for mechanics rebuilding a 1990-1996 Sea-Doo 580 personal watercraft, this Namura .020 over bore piston kit ensures a reliable top-end rebuild.

Built For Performance

• Oversized 0.020 over bore (76.5mm) accommodates cylinder wear and allows a fresh bore
• High-strength aluminum alloy piston withstands combustion loads in two-stroke PWC engines
• Precision-machined ring lands and pin bore ensure proper ring seal and wrist pin alignment
• Includes pin, circlips, and rings for a complete piston assembly
• Designed for direct replacement in Sea-Doo 580 engine cases

Fits These Machines

• for Sea-Doo 580 PWC (1990-1996)

On-The-Job Use

• Rebuilding a Sea-Doo 580 top end after scoring or blow-by
• Restoring compression for reliable summer riding
• Machining the cylinder to 0.020 over and installing this piston kit
• Performing a full engine overhaul on a 1990-1996 Sea-Doo 580

Specs At A Glance

Good To Know

Q: Do I need to bore the cylinder to use this kit? A: Yes, this is a 0.020 over bore piston kit so the cylinder must be machined to 76.5mm to achieve proper clearance.

Q: What components are included in this kit? A: The kit includes the piston, piston rings, wrist pin, and circlips—everything needed for a top-end rebuild on a Sea-Doo 580.

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