Namura .040 Over Bore Piston Kit for Polaris Scrambler 1000 Sportsman 91.5mm

Namura .040 Over Bore Piston Kit for Polaris Scrambler 1000 Sportsman

This .040 over bore piston kit is a direct-fit replacement for Polaris Scrambler 1000 and Sportsman models, providing a 91.5mm piston for rebuilding engines with worn cylinders.

Overview

The Namura .040 over bore piston kit is designed to restore lost compression and power in Polaris Scrambler 1000 and Sportsman engines. This 91.5mm piston set accommodates cylinder wear, allowing a precise rebuild without reboring to a larger size. It is a reliable option for ATV and UTV owners looking to refresh their top end.

Built For Performance

• Precision-machined 91.5mm piston for .040 over bore applications
• High-strength aluminum alloy construction for durability
• Includes piston rings and wrist pin for a complete replacement
• Designed to match OEM clearances and tolerances
• Resists scuffing and galling under high load

On-The-Job Use

• Used during engine rebuilds for Polaris Scrambler 1000 and Sportsman models
• Suitable for trail riding, mudding, and recreational off-road use
• Ideal for restoring performance in high-mileage engines

Specs At A Glance

Good To Know

Q: Does this kit include a circlip? A: The kit includes the piston, rings, and wrist pin; circlips may be included depending on the specific set, so verify with your existing hardware.

Q: Can I use this piston with a standard bore cylinder? A: No, this is a .040 over bore piston designed for cylinders that have been bored to 91.5mm; it will not fit a standard bore cylinder.

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