SPI .010 Over Bore Piston Kit for Polaris XC 500, XC SP 500 RMK Classic 70.75mm

SPI .010 Over Bore Piston Kit for Polaris

This SPI .010 over bore piston kit is a direct replacement engine component for Polaris XC 500, XC SP 500, and RMK Classic snowmobiles, providing a 70.75mm bore size for engine rebuilds. Designed as an aftermarket oversize piston kit, it restores compression and performance in two-stroke Polaris engines.

Overview

The SPI .010 over bore piston kit is a high-quality aftermarket replacement for Polaris XC 500, XC SP 500, and RMK Classic snowmobile engines. This piston kit features a 70.75mm bore diameter with a .010 over size, ideal for cylinders that have been honed or bored oversize. It provides everything needed for a reliable top-end rebuild to get your Polaris back on the trail.

Built For Performance

• Manufactured from high-strength aluminum alloy for durability
• Includes rings, wrist pin, and circlips for a complete install
• Precision-machined to .010 over specification for accurate fit
• Designed to match OEM compression and ring tension

Fits These Machines

• for Polaris XC 500
• for Polaris XC SP 500
• for Polaris RMK Classic

On-The-Job Use

• Commonly used for engine rebuilds on Polaris snowmobiles
• Ideal for restoring lost compression and power in high-mileage engines
• Suitable for trail riding, mountain riding, and recreational snowmobiling

Specs At A Glance

Good To Know

Q: Does this piston kit include all necessary components? A: Yes, the kit comes with piston, rings, wrist pin, and circlips, but you will need to reuse or replace the cylinder and bearings.

Q: Can this piston be used with a standard bore cylinder? A: No, this .010 over piston requires the cylinder to be bored to the matching oversize specification.

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