Universal Parts Wrist Pin Bearing, 10mm 13.8mm Outer Dia.

Smooth Rotation: Universal Parts 10mm Wrist Pin Bearing

Ensure the vital connection between your piston and connecting rod remains friction-free with the Universal Parts 10mm Wrist Pin Bearing. Engineered for 50cc 2-stroke engines, this small-end needle bearing is designed to withstand the rapid oscillating movements and high temperatures of the combustion chamber. Whether you are performing a top-end refresh or a full engine rebuild, this precision-ground bearing provides the stable support needed to prevent premature wrist pin wear and engine vibration.

Technical Performance Features

• Precision Needle Rollers: High-grade steel rollers provide maximum load-bearing capacity while maintaining a thin profile for tight engine tolerances.
• Friction-Reducing Design: Optimized cage architecture allows for maximum oil penetration, ensuring the bearing stays lubricated even at high RPMs.
• Durable Metal Construction: Manufactured to resist thermal expansion and shock-loading, essential for the longevity of small-displacement 2-stroke builds.
• Direct Fitment: Engineered as a standard replacement for 10mm wrist pin applications across various scooter and moped platforms.

Comprehensive Fitment Guide

This bearing is a standard fit for many 50cc 2-Stroke engines using a 10mm wrist pin:

Specifications

• Inner Diameter (ID): 10.4mm
• Outer Diameter (OD): 13.8mm
• Length: 12.6mm
• Material: Hardened Steel

Mechanic's Note: The wrist pin bearing is often the most overlooked part of a top-end rebuild. Safety Warning: A worn bearing can lead to wrist pin "slap" which eventually destroys both the piston and the rod. Pro Tip: Always soak your new bearing in 2-Stroke Oil for several minutes before installation to ensure it isn't "dry" during the critical first few seconds of engine startup!

SKU: 105-29
Vendor: Universal Parts