Namura .040 Over Bore Piston & Gasket Kit for Arctic Cat 1999-2005 250 ATV 67mm

Namura .040 Over Bore Piston & Gasket Kit for Arctic Cat

This Namura .040 over bore piston and gasket kit is a replacement for Arctic Cat 1999-2005 250 ATV engines with a 67mm bore. It includes a cast piston, rings, and all necessary gaskets for a complete upper engine rebuild.

Overview

This Namura .040 over bore piston and gasket kit is designed for Arctic Cat 250 ATVs from 1999-2005, featuring a 67mm piston size. The kit provides everything needed for a top-end rebuild, including piston, rings, wrist pin, and gaskets. Using this piston and gasket kit restores compression and performance to worn engines.

Built For Performance

• Cast aluminum piston with .040 over bore size for increased displacement
• Includes high-quality rings for proper sealing
• Complete gasket set for accurate reassembly
• Precision-machined to factory specifications
• Wrist pin and circlips included for a complete kit
• Designed for reliable operation in ATV applications

Fits These Machines

• for Arctic Cat 250 ATV (1999-2005)

On-The-Job Use

• Used for rebuilding worn Arctic Cat 250 ATV engines
• Ideal for restoring power and performance after high mileage
• Suitable for trail riding, utility work, and recreational ATV use
• Commonly installed during full top-end overhauls

Specs At A Glance

Good To Know

Q: Is this piston and gasket kit for a standard bore or overbore? A: This kit is for a .040 over bore (67mm) so the cylinder must be bored to match the oversized piston.

Q: Does the kit include cylinder head gasket? A: Yes, the gasket set includes all necessary top-end gaskets including the head gasket and base gasket.

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