3 Namura Piston Kits for Yamaha fits 2003-2008 GP-R 1300 .020 Over Bore 84.5mm

Piston Kits for Yamaha

This set of three piston kits is designed for Yamaha GP-R 1300 personal watercraft engines from 2003 to 2008, featuring a .020 over bore of 84.5mm for rebuilding worn cylinders. Each kit provides the pistons, rings, and pins needed for a top-end overhaul.

Overview

Three Namura piston kits for Yamaha GP-R 1300 engines deliver a .020 over bore at 84.5mm, ideal for restoring compression and power in high-mileage watercraft. These piston kits are engineered to match OEM specifications, ensuring reliable performance for Yamaha GP-R 1300 owners seeking a cost-effective rebuild solution. Whether you are refreshing a single engine or building for racing, these piston kits offer quality components for a complete top-end job.

Built For Performance

• Manufactured from high-silicon aluminum alloy for durability and heat resistance
• Precision-machined ring grooves ensure proper ring sealing
• Includes piston, rings, wrist pin, and circlips for a complete set
• .020 over bore (84.5mm) allows for cylinder cleanup and oversize fitment
• Lightweight design reduces reciprocating mass for improved throttle response

Fits These Machines

• for Yamaha GP-R 1300 (2003-2008)

On-The-Job Use

• Commonly used in high-performance personal watercraft rebuilds
• Ideal for restoring lost compression in worn engines
• Suitable for recreational and competitive riding applications
• Often selected by DIY mechanics for top-end overhauls

Specs At A Glance

Good To Know

Q: What engines do these piston kits fit? A: They are designed for Yamaha GP-R 1300 engines from 2003 to 2008, specifically with a .020 over bore of 84.5mm.

Q: Are these complete kits? A: Yes, each kit includes a piston, rings, wrist pin, and circlips; you will need to reuse or replace other top-end gaskets separately.

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