Namura Standard Bore Piston Kit for Honda TRX300EX & TRX300X fits 1993-2009 74mm

Standard Bore Piston Kit for Honda

This Namura standard bore piston kit replaces the original piston in Honda TRX300EX and TRX300X ATVs from 1993 to 2009, featuring a 74mm bore diameter for reliable engine rebuilds.

Overview

The Namura standard bore piston kit is a direct replacement for Honda TRX300EX and TRX300X models, providing a precision-machined 74mm piston for restoring compression and performance. This piston kit is ideal for top-end rebuilds on 1993-2009 Honda 300cc ATVs.

Built For Performance

• Precision-ground 74mm bore diameter for exact fit
• Includes piston rings and wrist pin for complete installation
• Manufactured from high-strength aluminum alloy
• Designed for standard bore applications (no overbore needed)
• Compatible with Honda TRX300EX and TRX300X engines

Fits These Machines

• for Honda TRX300EX (1993-2009)
• for Honda TRX300X (1993-2009)

On-The-Job Use

• Rebuilding top end on Honda 300cc ATVs
• Restoring compression and power after high mileage
• Replacing worn pistons during engine overhaul
• Performance restoration for trail and sport riding

Specs At A Glance

Good To Know

Q: Will this piston kit fit models with a different bore size? A: No, this is a standard bore 74mm kit; for overbore sizes, select the appropriate oversize piston kit.

Q: Do I need to replace the cylinder? A: Typically the cylinder can be re-used if it is within spec, but always measure the cylinder bore and clearance before installation.

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