Universal Parts 10mm Wrist Pin Bearing: 2-Stroke

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: Engine Family Typical Models Minarelli / Yamaha Style Jog, Zuma 50 (Pre-2002), BWS 50 Genuine Buddy 50, Roughhouse 50, Rattler 50 Chinese 2-Stroke (1PE40QMB) Adly, Hammerhead, Keeway, Vento General Size Match Fits most 10mm ID / 13.7mm OD applications Technical Specifications Inner Diameter (ID): 10.2mm Outer Diameter (OD): 13.75mm 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