Namura .040 Over Bore Piston & Gasket Kit Sportsman 400 & 450 Ranger 425 88.9mm

.040 Over Bore Piston & Gasket Kit for Sportsman 400 & 450 and Ranger 425

This aftermarket piston and gasket kit provides a .040 inch oversized bore (88.9mm) for rebuilding engines in Polaris Sportsman 400, Sportsman 450, and Ranger 425 models, offering reliable performance and a direct fit replacement.

Overview

The .040 over bore piston and gasket kit is designed for rebuilding the engine of your Sportsman 400, Sportsman 450, or Ranger 425. This kit includes the piston, rings, and necessary gaskets to restore compression and power. It is a cost-effective solution for refreshing your ATV or UTV engine.

Built For Performance

• .040 inch oversize compensates for cylinder wear
• Precision-machined piston for consistent fit
• Complete gasket set included for a reliable seal
• High-quality piston rings ensure proper compression
• Designed for 88.9mm bore diameter

Fits These Machines

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

On-The-Job Use

• Trail riding and recreational off-roading
• Hunting and outdoor utility work
• Farm and ranch light-duty tasks
• Engine rebuild during maintenance or repair

Specs At A Glance

Good To Know

Q: Will this kit work with my specific engine? A: This kit is designed for the listed Polaris models, but always confirm your engine serial number and cylinder condition before ordering.

Q: What gaskets are included? A: The kit includes the necessary head gasket, base gasket, and other sealing components needed for a complete piston and gasket replacement.

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