{"product_id":"universal-parts-wrist-pin-bearing-10mm-13-7mm-outer-dia-105-29","title":"Universal Parts 10mm Wrist Pin Bearing: 2-Stroke","description":"\u003ch2\u003eSmooth Rotation: Universal Parts 10mm Wrist Pin Bearing\u003c\/h2\u003e\u003cp\u003eEnsure the vital connection between your piston and connecting rod remains friction-free with the \u003cstrong\u003eUniversal Parts 10mm Wrist Pin Bearing\u003c\/strong\u003e. 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.\u003c\/p\u003e\u003ch3\u003eTechnical Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Needle Rollers:\u003c\/strong\u003e High-grade steel rollers provide maximum load-bearing capacity while maintaining a thin profile for tight engine tolerances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriction-Reducing Design:\u003c\/strong\u003e Optimized cage architecture allows for maximum oil penetration, ensuring the bearing stays lubricated even at high RPMs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Metal Construction:\u003c\/strong\u003e Manufactured to resist thermal expansion and shock-loading, essential for the longevity of small-displacement 2-stroke builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fitment:\u003c\/strong\u003e Engineered as a standard replacement for 10mm wrist pin applications across various scooter and moped platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThis bearing is a standard fit for many \u003cstrong\u003e50cc 2-Stroke\u003c\/strong\u003e engines using a 10mm wrist pin:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eEngine Family\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eTypical Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinarelli \/ Yamaha Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJog, Zuma 50 (Pre-2002), BWS 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGenuine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuddy 50, Roughhouse 50, Rattler 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChinese 2-Stroke (1PE40QMB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdly, Hammerhead, Keeway, Vento\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGeneral Size Match\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFits most 10mm ID \/ 13.7mm OD applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter (ID):\u003c\/strong\u003e 10.2mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter (OD):\u003c\/strong\u003e 13.75mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 12.6mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hardened Steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e The wrist pin bearing is often the most overlooked part of a top-end rebuild.\u003c\/blockquote\u003e\u003cblockquote\u003e\n\u003cstrong\u003eSafety Warning:\u003c\/strong\u003e A worn bearing can lead to wrist pin \"slap\" which eventually destroys both the piston and the rod.\u003c\/blockquote\u003e\u003cblockquote\u003e\n\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always soak your new bearing in \u003cstrong\u003e\u003ca href=\"https:\/\/www.scooterworks.com\"\u003e2-Stroke Oil\u003c\/a\u003e\u003c\/strong\u003e for several minutes before installation to ensure it isn't \"dry\" during the critical first few seconds of engine startup!\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 105-29 \u003cbr\u003e\u003cstrong\u003eVendor:\u003c\/strong\u003e Universal Parts\u003c\/p\u003e","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":50006494019864,"sku":"105-29","price":8.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/453705.jpg?v=1776880966","url":"https:\/\/www.scooterworks.com\/products\/universal-parts-wrist-pin-bearing-10mm-13-7mm-outer-dia-105-29","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}