Namura .040 Over Bore Piston Kit for Polaris Trail Blazer 250 1990-2006 73mm

Namura .040 Over Bore Piston Kit for Polaris

This .040 over bore piston kit is a direct replacement for the Polaris Trail Blazer 250, providing the necessary components to rebuild the engine with an oversized piston for restoring compression and performance.

Overview

The Namura .040 over bore piston kit is designed for the Polaris Trail Blazer 250 from 1990 through 2006, delivering a reliable and durable piston assembly with rings, pin, and clips to refresh a worn cylinder. This kit ensures proper fitment and longevity for your ATV's engine rebuild.

Built For Performance

• High‑silicon aluminum alloy construction reduces expansion and noise
• Precision‑machined to .040 over bore specification (73mm) for a proper cylinder fit
• Includes a matched set of piston rings for optimal sealing
• Wrist pin and retaining clips are included for complete installation
• CNC‑profiled skirt reduces friction and wear

Fits These Machines

• for Polaris Trail Blazer 250 (1990‑2006)

On‑The‑Job Use

• ATV trail riding and recreational off‑road use
• Engine rebuilds where cylinder bore correction is needed
• Restoring performance in high‑mileage Polaris Trail Blazer 250 engines

Specs At A Glance

Good To Know

Q: Will this piston kit work with a standard cylinder? A: No, the .040 over bore piston requires the cylinder to be bored to the matching oversize dimension; a standard cylinder will not fit.

Q: Does this kit include a top end gasket set? A: No, this is a piston kit only; you will need to purchase a separate gasket set for a complete top end rebuild.

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