Namura .020 Over Bore Piston Kit for Honda Foreman 400 4x4 fits 1995-2003 86.5mm

Namura .020 Over Bore Piston Kit for Honda

This Namura .020 over bore piston kit is a direct replacement for Honda Foreman 400 4x4 ATVs, featuring an oversized 86.5mm piston to restore engine performance in models from 1995 to 2003.

Overview

The Namura .020 over bore piston kit offers a reliable solution for rebuilding the top end of Honda Foreman 400 4x4 engines. Designed for 1995-2003 models, this 86.5mm piston kit helps restore lost power and compression after many hours of ATV use.

Built For Performance

• High-strength aluminum alloy construction withstands demanding utility ATV operation
• .020 over bore size allows cylinder resurfacing while maintaining precise fit
• Includes piston rings, wrist pin, and pin clips for complete installation
• Skirt-coated for reduced wear and improved cold-start performance
• Engineered to match factory compression ratios for reliable power

Fits These Machines

• for Honda Foreman 400 4x4 (1995-2003)

On-The-Job Use

• Utility ATV work such as hauling, plowing, and trail maintenance
• Recreational trail riding and hunting where engine reliability is critical
• Engine rebuilds for aging Foreman 400 models to extend service life
• Performance restoration after high-mileage wear on the cylinder and piston

Specs At A Glance

Good To Know

Q: Can I install this piston kit without boring the cylinder? A: No, this is a .020 over bore piston, so the cylinder must be bored to 86.5mm by a qualified machine shop before installation.

Q: Is this kit compatible with the Honda Foreman 400 2WD model? A: The kit is specifically listed for the Foreman 400 4x4; for 2WD models, confirm compatibility with your engine serial number.

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