Namura Standard Bore Piston & Gasket Kit for Honda Rancher 420 2009-2026 86.5mm

Namura Standard Bore Piston & Gasket Kit for Honda

This Namura standard bore piston and gasket kit is a replacement top-end component designed to restore compression and performance in compatible Honda Rancher 420 engines from 2009-2026, featuring an 86.5mm bore size. It includes the piston, rings, wrist pin, and necessary gaskets for a complete rebuild. Ideal for DIY maintenance or professional repair, this Namura standard bore piston kit provides a reliable OEM-style replacement.

Overview

The Namura standard bore piston & gasket kit is a direct-fit replacement assembly for Honda Rancher 420 models, providing the piston, rings, wrist pin, and gaskets needed to refresh your engine's top end. This kit is specifically engineered for 86.5mm bore engines, making it suitable for standard-bore rebuilds without overboring. Whether you are addressing low compression or performing preventive maintenance, this Namura standard bore piston & gasket kit delivers dependable performance for your Honda ATV.

Built For Performance

• Precision-cast piston for consistent fit and reliable operation
• Includes high-quality piston rings for optimal compression and oil control
• Complete gasket set ensures a proper seal and simplifies the rebuild process
• Engineered to meet or exceed OEM specifications for Honda 420 engines
• Includes wrist pin and circlips for a complete piston assembly

Fits These Machines

• for Honda Rancher 420 (2009-2026)

On-The-Job Use

• Trail riding and recreational ATV use requiring reliable engine performance
• Farm and ranch work where the Rancher 420 is used for hauling or utility tasks
• Engine rebuild or top-end repair due to wear, loss of compression, or ring failure
• DIY at-home engine maintenance and restoration projects

Specs At A Glance

Good To Know

Q: Is the piston pre-installed with rings? A: No, the rings are included separately and must be installed onto the piston crown with proper ring gap orientation during assembly.

Q: Will this kit work if my cylinder has been previously overbored? A: No, this is a standard bore (86.5mm) kit intended for cylinders at original factory diameter; it will not fit a cylinder that has been machined to an oversize.

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