SPI .040 Over Bore Piston Kit for Polaris Widetrak LX 500 fits 1998-2011 73mm

.040 Over Bore Piston Kit for Polaris

This .040 over bore piston kit is a high-performance replacement for Polaris Widetrak LX 500 snowmobiles from 1998 to 2011, featuring a 73mm bore size.

Overview

This .040 over bore piston kit is designed to restore and enhance engine performance for Polaris Widetrak LX 500 models. Built as a direct replacement, the piston kit provides a reliable and durable upgrade for your snowmobile's engine. Ideal for those seeking an overbore solution to refresh worn cylinders, this kit ensures a precise fit and long-lasting operation.

Built For Performance

• .040 over bore increases displacement for more power
• 73mm piston diameter provides optimized cylinder wall clearance
• High-strength aluminum alloy construction reduces weight and resists wear
• Precision-machined ring grooves ensure proper ring sealing
• Includes piston rings, wrist pin, and circlips for complete installation

Fits These Machines

• for Polaris Widetrak LX 500 (1998-2011)

On-The-Job Use

• Rebuilding snowmobile engines after wear or damage
• Restoring compression and performance in high-mileage machines
• Upgrading for better throttle response in deep snow conditions
• Overbore repair when cylinders are already worn past stock limits

Specs At A Glance

Good To Know

Q: Will this piston kit fit my engine without modifications? A: It is designed as a direct replacement for the stock piston in the listed models, but you must ensure your cylinder is properly bored to .040 over and honed to the correct finish.

Q: Do I need to replace the cylinder or just recondition it? A: Typically the cylinder can be bored to remove scoring or wear and then fitted with this oversized piston. Confirm your cylinder wall thickness allows a .040 overbore.

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