Namura .040 Over Bore Piston Kit fits Polaris 850 Scrambler & Sportsman 88mm

Namura .040 Over Bore Piston Kit for Polaris

This .040 over bore piston kit by Namura is designed to fit Polaris 850 Scrambler and Sportsman models with an 88mm bore, providing a direct replacement performance piston for engine rebuilding.

Overview

This Namura .040 over bore piston kit for Polaris 850 Scrambler and Sportsman is a high-quality aftermarket replacement for engines requiring a .040 oversize piston. It includes the piston, rings, and wrist pin, designed to restore compression and power. Compatible with 88mm bore Polaris engines, this kit is ideal for rebuilding or upgrading your ATV's engine.

Built For Performance

• Precision-machined from high-grade aluminum alloy
• Includes premium piston rings for optimal sealing
• Designed for .040 oversize bore to clean up worn cylinders
• Matched wrist pin for secure connection
• Proven performance in Polaris 850 engines
• Manufactured by Namura, a trusted aftermarket brand

Fits These Machines

• for Polaris 850 Scrambler
• for Polaris 850 Sportsman

On-The-Job Use

• Rebuilding the top end of Polaris 850 engines
• Restoring lost compression and performance
• Installing during cylinder boring to .040 oversize
• Used in recreational and utility Polaris ATVs
• Commonly performed by experienced mechanics and DIY builders

Specs At A Glance

Good To Know

Q: What is the bore size for this piston kit? A: This kit is for an 88mm bore, which is the standard bore for Polaris 850 engines with a .040 oversize.

Q: Does this kit come with piston rings? A: Yes, the Namura piston kit includes the piston, rings, and wrist pin for a complete replacement.

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