{"product_id":"naraku-heavy-duty-12mm-wrist-pin-bearing-50cc-2t","title":"Naraku Heavy Duty 12mm Wrist Pin Bearing: 50cc 2T","description":"\u003cp\u003eHigh-RPM Reliability: Naraku Heavy Duty Small End Bearing Ensure the heart of your engine remains stable with the Naraku Heavy Duty Wrist Pin Bearing . Engineered for 50cc 2-stroke engines, this \"small end\" needle bearing features a reinforced silver-plated cage designed to withstand the extreme thermal stress and high rotational speeds of performance tuning. Whether you are performing a routine top-end refresh or installing a high-compression cylinder kit, this bearing provides the precision fit and reduced friction necessary to prevent catastrophic engine failure. Technical Performance Features Heavy Duty Silver Cage: Specifically designed for superior heat dissipation and reduced friction compared to standard steel-caged bearings. Precision Needle Rollers: Features high-grade hardened steel rollers for maximum load-bearing capacity and smooth piston articulation. Optimized for Performance: The ideal choice for \"Sport\" and \"Mid-Race\" 70cc kits where crankshaft RPM exceeds factory limits. OEM-Spec Dimensions: A direct 12x17x13mm replacement for a wide range of European and Japanese 2-stroke scooters. Comprehensive Fitment Guide This bearing fits a massive variety of 50cc 2-Stroke models using a 12mm wrist pin: Brand Compatible Models Vespa \/ Piaggio ET2, LX\/LXV, Primavera, Sprint 50, Fly 50, Typhoon 50 Honda Dio, Elite 50 (1994+ \/ AF27\/AF28\/AF34\/AF35) Aprilia SR 50, Mojito, Scarabeo, Sport City One 50 Kymco \/ SYM Super 9, Agility, Like 50, DD 50, Fiddle I, Jet 50 Vintage Vespa PK 50, V 50 Technical Specifications Inner Diameter: 12mm Outer Diameter: 17mm Length: 13mm Cage Type: Silver-Plated Heavy Duty Mechanic's Note: The wrist pin bearing is the most stressed bearing in a 2-stroke engine. Safety Warning: Never reuse an old wrist pin bearing during a top-end rebuild. Pro Tip: When installing, liberally coat the bearing in high-quality 2-Stroke Racing Oil to ensure immediate lubrication upon the first start-up. Check your Piston Circlips for tension while you're in there! SKU: 137-73 Vendor: Naraku\u003c\/p\u003e","brand":"naraku","offers":[{"title":"Default Title","offer_id":48045875888315,"sku":"137-73","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/617288_ae6c5fbb-6d5b-4d2a-8458-f88411b06fc6.jpg?v=1783060603","url":"https:\/\/thriftyscooters.com\/products\/naraku-heavy-duty-12mm-wrist-pin-bearing-50cc-2t","provider":"Thrifty Scooters","version":"1.0","type":"link"}