Namura .040 Over Bore Piston Kit for Polaris Trail Boss 250 fits 1985-1999 73mm

Namura .040 Over Bore Piston Kit for Polaris

This Namura .040 over bore piston kit is designed to replace the original piston in Polaris Trail Boss 250 ATV engines from 1985-1999, featuring a 73mm bore and .040 over size.

Overview

This Namura .040 over bore piston kit provides a direct replacement for worn pistons in Polaris Trail Boss 250 ATVs built between 1985 and 1999. The 73mm bore and .040 over size help restore compression and engine performance. This piston kit is a cost-effective solution for keeping your Polaris Trail Boss 250 running strong.

Built For Performance

• Precision-cast from durable aluminum alloy
• Includes piston rings, wrist pin, and circlips for a complete kit
• Engineered for .040 oversize bore to match cylinder wear
• Designed to OEM specifications for Polaris Trail Boss 250 engines
• Provides reliable performance and long service life

Fits These Machines

• for Polaris Trail Boss 250

On-The-Job Use

• Engine top-end rebuild after many hours of use
• Restoring power and compression in ATV engines
• Commonly used during routine engine maintenance
• Suitable for utility and recreational ATV riding

Specs At A Glance

Good To Know

Q: Does this piston kit fit my Polaris Trail Boss 250? A: This kit is designed for 1985-1999 Polaris Trail Boss 250 models with a 73mm bore. Verify your engine identification number before ordering.

Q: What is included in the kit? A: The kit includes a piston, rings, wrist pin, and circlips for a complete top-end replacement.

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