Wave Runner 500 Pistons and Gasket Set for Yamaha 1989-1993 .010 in

.010" Pistons and Gasket Set for Yamaha Wave Runner 500

This .010" oversize piston and gasket set is built for the Yamaha Wave Runner 500, giving you the pistons, rings, and sealing components needed to refresh a top end after a cylinder bore.

Overview

This .010" pistons and gasket set is made for the Yamaha Wave Runner 500 PWC engine and serves as a top-end rebuild kit for riders doing a bore-over service. The piston and gasket set for Yamaha Wave Runner 500 pairs oversize pistons with the gaskets needed to reseal the engine after machining. It suits DIY mechanics and shops restoring a 1989-1993 Wave Runner 500.

Built For Performance

• .010 inch oversize pistons sized for a bored-over cylinder
• Piston rings included for a matched top-end seal
• Gasket set covers the seals disturbed during a top-end rebuild
• Machined piston bodies for consistent bore clearance
• Sold as a matched set for both cylinders

Fits These Machines

• for Yamaha Wave Runner 500, 1989
• for Yamaha Wave Runner 500, 1990
• for Yamaha Wave Runner 500, 1991
• for Yamaha Wave Runner 500, 1992
• for Yamaha Wave Runner 500, 1993

On-The-Job Use

• Top-end rebuilds after cylinder boring or honing
• Restoring compression on a high-hour Wave Runner 500
• Freshwater and saltwater PWC engine refresh work
• Seasonal maintenance on older two-stroke personal watercraft

Specs At A Glance

Good To Know

Q: Do I need to bore the cylinder to fit these pistons? A: Yes, .010" oversize pistons require the cylinder to be bored and honed to the matching clearance before installation.

Q: Can I install these without checking ring end gap? A: No, always measure ring end gap and piston-to-cylinder clearance during assembly to avoid poor sealing or seizure.

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