420832440 Wrist Pin Bearing for Polaris SLX 1050 1999

Wrist Pin Bearing for Polaris

A wrist pin bearing that sits between the connecting rod and the piston pin, allowing smooth rotation under load and helping reduce friction and wear inside the top end.

Overview

This wrist pin bearing is a direct replacement top end component built to handle the demands of a two stroke engine. It fits between the connecting rod small end and the piston pin on Polaris SLX 1050 machines, keeping the joint turning freely at high rpm. It is a practical choice for rebuilds and routine top end service.

Built For Performance

• Needle roller design spreads load evenly across the pin surface
• Precision ground rollers for smooth rotation inside the rod
• Hardened steel construction resists wear under high rpm
• Compact cage keeps needles aligned during installation
• Designed as a direct fit replacement for the listed part number

Fits These Machines

• for Polaris SLX 1050, 1999

On-The-Job Use

• Top end rebuilds and piston replacement jobs
• Connecting rod and piston pin service
• Routine maintenance on two stroke watercraft engines
• Restoring compression after piston wear

Specs At A Glance

Good To Know

Q: Should the wrist pin bearing be replaced every time the piston is changed? A: Replacing the wrist pin bearing during any top end rebuild is standard practice, since the bearing takes the same load and wear as the piston. Reusing a worn bearing can lead to noise, play, or early failure.

Q: Does this bearing need special lubrication before installation? A: Needle roller wrist pin bearings are normally fitted dry and receive lubrication from the fuel and oil mixture once the engine runs. Follow the service manual for your specific model during assembly.

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