Namura .040 Over Bore Piston Kit for Honda Rancher 420 fits 2007-2026 87.5mm

Namura .040 Over Bore Piston Kit for Honda

This .040 oversize piston kit replaces the stock piston in Honda Rancher 420 engines, increasing displacement and restoring compression. This piston kit is designed to fit 2007-2026 models and features a 87.5mm bore diameter.

Overview

The Namura .040 Over Bore Piston Kit for Honda is a direct replacement for worn pistons in Rancher 420 ATVs. This piston kit features a cast aluminum design with a reinforced skirt for durability. Installing this piston kit can help restore lost power and extend engine life.

Built For Performance

• Cast aluminum alloy construction for strength and heat dissipation
• Precision-machined 87.5mm bore
• Includes piston rings and wrist pin
• Reinforced piston skirt reduces slap
• Moly-coated skirt for reduced friction

Fits These Machines

• for Honda Rancher 420 (2007-2026)

On-The-Job Use

• Trail riding
• Utility work
• Farm and ranch chores
• Recreational ATV riding

Specs At A Glance

Good To Know

Q: Do I need to recondition the cylinder for this piston? A: Yes, a .040 over bore requires the cylinder to be bored and honed to the correct size before installation.

Q: Is this piston kit compatible with the stock cylinder head? A: This piston kit is designed to work with the stock cylinder head and camshaft on the Honda Rancher 420.

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