Namura .030 Over Bore Piston Kit for Honda Rancher 420 fits 2007-2026 87.25mm

Namura .030 Over Bore Piston Kit for Honda Rancher 420

This .030 over bore piston kit with 87.25mm diameter is designed to replace the original piston in Honda Rancher 420 ATVs from 2007 to 2026.

Overview

This Namura .030 over bore piston kit provides a direct replacement for worn pistons in Honda Rancher 420 models. The 87.25mm bore size accommodates cylinder wear, restoring compression and performance. It is an ideal solution for rebuilding engines in 2007-2026 Rancher 420 ATVs.

Built For Performance

• Precision cast aluminum piston with reinforced skirt
• Includes piston rings, wrist pin, and circlips
• .030 over size compensates for cylinder wear
• Matching 87.25mm diameter ensures proper clearance
• Designed for reliable operation in air-cooled engines

Fits These Machines

• for Honda Rancher 420 (2007-2026)

On-The-Job Use

• Engine rebuilds after high mileage or wear
• Restoration of older Rancher 420 models
• Rebuilding after cylinder scoring or ring failure
• Performance restoration for farm and trail ATVs

Specs At A Glance

Good To Know

Q: Do I need to hone the cylinder before installing this piston? A: Yes, the cylinder should be honed to the correct crosshatch pattern to ensure proper ring seating and oil retention with the new .030 over piston.

Q: Is this piston kit compatible with stock cylinder heads? A: Yes, it matches the original piston dimensions and will work with stock cylinder heads and valves 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.