Namura Standard Bore Piston Kit for Polaris Magnum 425 fits 1997-1998 87.9mm

Standard Bore Piston Kit for Polaris Magnum 425

This standard bore piston kit for Polaris Magnum 425 is a direct replacement that restores compression and power to your engine.

Overview

This piston kit for Polaris Magnum 425 includes a piston, rings, and wrist pin for a complete rebuild. Designed as a standard bore replacement with 87.9mm diameter, it ensures proper fitment for 1997-1998 models. Whether you are refreshing a tired engine or rebuilding after a failure, this piston kit delivers reliable performance.

Built For Performance

• Precision-machined from high-silicone aluminum alloy for strength and heat dissipation
• Includes chrome-plated piston rings for reduced friction and improved seal
• Weight-matched to OEM specifications for balanced engine operation
• Heat-treated for durability under high-temperature conditions
• Includes wrist pin and circlips for a complete installation

Fits These Machines

• for Polaris Magnum 425 (1997-1998)

On-The-Job Use

• Trail riding and recreational off-road use
• Farm and ranch utility tasks
• Engine rebuilds and top-end overhauls
• Restoring lost compression and power in aging ATVs

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with standard bore cylinders? A: Yes, this kit is designed for standard bore (87.9mm) cylinders and includes matching rings for a proper seal.

Q: Do I need to replace the wrist pin or can I reuse the old one? A: The kit includes a new wrist pin and circlips for a complete installation; it is recommended to replace them for optimal performance.

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