Wrist Pin Bearing for Kawasaki Astro 340 & 440 1977

Wrist Pin Bearing for Kawasaki Astro 340 & 440

This wrist pin bearing is a replacement connecting-rod bearing for the Kawasaki Astro 340 and Astro 440 snowmobiles of 1977, seating the piston pin inside the connecting rod so the piston can pivot smoothly under load.

Overview

This wrist pin bearing serves as the pivot between piston pin and connecting rod in the Kawasaki Astro 340 and 440 engines. It is built as a direct replacement for the original bearing, restoring the free rotation the piston needs at high rpm. Riders and mechanics rebuilding a 1977 Astro top end will find this wrist pin bearing a practical match for the job.

Built For Performance

• Roller bearing design keeps the piston pin rotating freely inside the connecting rod
• Hardened steel rollers resist the shock loads of two-stroke combustion
• Caged construction holds rollers evenly spaced around the pin
• Sized to match the Kawasaki Astro 340 and 440 piston pin and rod bore
• Replaces the worn bearing during a top-end rebuild

Fits These Machines

• for Kawasaki Astro 340, 1977
• for Kawasaki Astro 440, 1977

On-The-Job Use

• Top-end rebuilds on 1977 Astro 340 and 440 engines
• Replacing a noisy or seized wrist pin bearing
• Piston and ring service on vintage Kawasaki snowmobiles
• Refresh work before a season of trail riding

Specs At A Glance

Good To Know

Q: How do I know my wrist pin bearing needs replacing? A: A rattling top end, metal debris in the crankcase, or a pin that rocks loosely in the rod all point to a worn wrist pin bearing. Measure the pin and rod bore against spec before ordering.

Q: Should I replace other parts at the same time? A: Bearings, pin, and piston are best renewed together during a top-end rebuild. Inspect the rod bore and piston skirt while the cylinder is off.

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