Namura .040 Over Bore Piston Kit for Honda TRX90 Sportrax 90 2x4 1993-2025 48mm

Namura .040 Over Bore Piston Kit for Honda TRX90 Sportrax 90

This Namura .040 over bore piston kit (48mm) fits Honda TRX90 Sportrax 90 2x4 models from 1993 to 2025.

Overview

This Namura .040 over bore piston kit is designed for Honda TRX90 Sportrax 90 2x4 ATVs from 1993 to 2025. With a 48mm bore (0.040 over), this piston kit allows you to rebuild worn cylinders to a larger size. It is a direct fit for the TRX90 engine when the cylinder has been bored accordingly.

Built For Performance

• Oversize .040 (1.0mm) for restored cylinder bores
• Includes piston, rings, wrist pin, and circlips
• Precision-cast aluminum alloy for durability
• Matching ring set ensures proper sealing
• Engineered for Honda TRX90 engine specifications

Fits These Machines

• for Honda TRX90 Sportrax 90 2x4 1993-2025

On-The-Job Use

• Engine rebuilding with overbored cylinders
• Top-end overhaul of Honda TRX90 ATVs
• Performance restoration for youth ATVs

Specs At A Glance

Good To Know

Q: Do I need to bore my cylinder to use this piston? A: Yes, the cylinder must be bored to 48mm to accept this .040 over piston; it will not fit a standard 47mm bore.

Q: Are these pistons compatible with aftermarket cylinders? A: They are designed for OEM-style cylinders that have been bored to 48mm; confirm your cylinder's final bore size.

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