Namura Size B Standard Bore Piston Kit for Polaris 850 Scrambler, Sportsman 87mm

Size B Standard Bore Piston Kit for Polaris

This Namura size B standard bore piston kit (87mm) replaces the factory piston in Polaris 850 Scrambler and Sportsman engines, restoring compression and performance.

Overview

This Namura size B standard bore piston kit is engineered for Polaris 850 Scrambler and Sportsman ATVs. It provides a direct replacement for the original piston, ensuring reliable power delivery and long service life. The 87mm bore size maintains factory specifications for optimal engine performance.

Built For Performance

• Precision-machined from high-strength aluminum alloy for durability
• Size B standard bore maintains factory clearance specifications
• Includes piston rings and wrist pin for complete installation
• Rigid quality control ensures consistent weight and dimensions
• Designed to match Polaris 850 engine tolerances

Fits These Machines

• for Polaris 850 Scrambler
• for Polaris 850 Sportsman

On-The-Job Use

• Rebuilding high-performance Polaris 850 ATV engines
• Replacing worn pistons in Scrambler models
• Restoring engine compression in Sportsman utility vehicles
• Overhauling after top-end failure or high mileage

Specs At A Glance

Good To Know

Q: Will this piston kit work with my Polaris 850 Scrambler? A: Yes, it is designed as a direct replacement for the factory piston in Polaris 850 Scrambler and Sportsman models with standard bore specifications.

Q: Do I need to hone the cylinder before installation? A: For best results, the cylinder should be honed to match the new piston rings and ensure proper seating.

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