Namura .060 Over Bore Piston & Top Gasket Kit for Honda TRX300EX TRX300X 75.5mm

.060 Over Bore Piston & Top Gasket Kit for Namura

This .060 over bore piston and top gasket kit provides a reliable performance upgrade for Honda TRX300EX and TRX300X ATVs, featuring a 75.5mm bore size.

Overview

The .060 over bore piston and top gasket kit by Namura is designed to restore compression and power in high-mileage Honda TRX300EX and TRX300X engines. This 75.5mm piston kit includes rings, wrist pin, and top gasket set for a complete top-end rebuild. Ideal for racers and trail riders seeking reliable performance from their ATV.

Built For Performance

• .060 over bore increases displacement for added torque
• High-strength aluminum alloy piston resists wear
• Precision-machined ring grooves for optimal seal
• Includes top gasket set for leak-free installation
• Designed for use with Namura's proprietary casting process

Fits These Machines

• for Honda TRX300EX
• for Honda TRX300X

On-The-Job Use

• Trail riding and recreational ATV use
• Racing and competitive off-road events
• Engine rebuilds to restore lost compression

Specs At A Glance

Good To Know

Q: Does this kit include wrist pin and circlips? A: Yes, the kit comes with the piston, rings, wrist pin, circlips, and top gaskets for a complete top-end installation.

Q: Can this piston be used with stock cylinder? A: The .060 over bore requires the cylinder to be bored to 75.5mm by a qualified machine shop.

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