Namura Standard Bore Piston & Gasket Kit Sportsman 400 & 450 Ranger 425 87.9mm

Standard Bore Piston & Gasket Kit for Namura

This standard bore piston and gasket kit for Namura restores engine compression and performance in Polaris Sportsman and Ranger models. The standard bore piston and gasket kit includes a precision-machined piston, rings, and gaskets for a complete rebuild. 87.9mm bore size ensures a direct fit for these specific engines.

Overview

This standard bore piston and gasket kit for Namura is designed to replace worn components in Polaris Sportsman 400, 450, and Ranger 425 engines. It provides a reliable, cost-effective solution for restoring power and reliability. The kit is built to meet or exceed original specifications, making it a trusted choice for ATV and UTV owners.

Built For Performance

• Includes piston, rings, and gaskets for a complete top-end rebuild
• 87.9mm standard bore diameter for precise fitment
• Machined from high-strength aluminum alloy for durability
• Direct replacement design simplifies installation
• Engineered to match OEM clearance and compression ratios

Fits These Machines

• for Sportsman 400
• for Sportsman 450
• for Ranger 425

Specs At A Glance

Good To Know

Q: Does this kit come with wrist pin and clips? A: The kit includes piston, rings, and gaskets; wrist pin and clips are typically included, but verify with your specific order.

Q: Can I use this piston with a different bore size? A: No, this is a standard bore 87.9mm piston, not oversized; use only if your cylinder is within spec.

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