Namura .040 Over Bore Piston Kit for Honda Foreman 450 4x4 fits 1998-2004 91mm

Namura .040 Over Bore Piston Kit for Honda

This Namura .040 over bore piston kit is designed for Honda Foreman 450 4x4 ATVs from 1998 to 2004, featuring a 91mm bore size to compensate for cylinder wear and restore engine compression.

Overview

This Namura piston kit provides an affordable overbore solution for Honda Foreman 450 4x4 engines. With a .040 over bore and 91mm diameter, it restores lost compression and performance in worn cylinders. This rebuild kit is ideal for ATV owners addressing top-end wear.

Built For Performance

• Overbore design enlarges cylinder to 91mm
• Oversize of .040 in (1.0mm) for worn cylinders
• Direct fit for Honda Foreman 450 4x4 (1998-2004)
• Manufactured by Namura to aftermarket standards
• Includes piston and rings as a complete kit

Fits These Machines

• for Honda Foreman 450 4x4 (1998-2004)

On-The-Job Use

• ATV trail and recreational riding
• Farm and ranch utility work
• Hunting and outdoor exploration
• Engine top-end rebuilds

Specs At A Glance

Good To Know

Q: How do I know if my cylinder needs an overbore? A: If the cylinder shows visible scoring or is out of round beyond service limits, an overbore piston kit can restore proper fit and compression.

Q: Do I need to replace the cylinder when using an overbore piston? A: Typically the cylinder is bored to match the new piston size; the kit includes the piston and rings, and the cylinder is reused after machining.

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