Namura Standard Bore Piston Kit for Honda TRX400EX & TRX400X Sportrax 85mm

Namura Standard Bore Piston Kit for Honda TRX400EX & TRX400X Sportrax 85mm

This Namura Standard Bore Piston Kit is a direct replacement piston assembly for Honda TRX400EX and TRX400X Sportrax ATVs, offering reliable performance and a precise 85mm bore size.

Overview

The Namura Standard Bore Piston Kit is designed to restore compression and power in your Honda TRX400EX or TRX400X Sportrax. This 85mm piston kit includes a high-strength piston, rings, and wrist pin for a complete top-end rebuild. It is an ideal choice for riders seeking a dependable replacement piston for their Sportrax ATV.

Built For Performance

• High-silicon aluminum alloy piston for reduced expansion and longer life
• Precision-machined skirt profile for consistent cylinder wall contact
• Includes premium piston rings for optimal seal and low friction
• Heat-treated wrist pin for strength under high load
• Matching 85mm bore size ensures proper fitment

Fits These Machines

• for Honda TRX400EX
• for Honda TRX400X Sportrax

On-The-Job Use

• Recreational trail riding on sport ATVs
• Competitive off-road racing events
• Daily farm or ranch utility riding
• Restoring top-end performance in high-hour engines

Specs At A Glance

Good To Know

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

Q: Can this piston be used with stock Honda cylinder? A: This is a standard bore 85mm piston designed for stock Honda cylinders, but always measure your cylinder bore 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.