{"product_id":"namura-top-end-kit-for-polaris-700-nikasil-cylinder-79-97-mm-part-number-na-50070-ck1","title":"Namura Top End Kit for Polaris 700, Nikasil Cylinder, 79.97 mm, Part Number NA-50070-CK1","description":"\u003cp\u003eRestore reliable top-end performance with the Namura NA-50070-CK1 Top End Kit for select Polaris 700 engines. Designed for Nikasil-plated cylinders, this kit includes the piston, piston rings, wrist pin, retaining clips, top-end bearing, and complete gasket kit needed for a comprehensive upper-engine rebuild. The precision-engineered components are designed to support proper fitment, durability, and consistent engine operation.\u003c\/p\u003e\u003cp\u003eThe piston uses a hypereutectic casting process that increases silicon content to help reduce expansion, improve wear resistance, and withstand higher cylinder temperatures. The MOS2 Teflon\/molybdenum-coated skirts are applied using a rolled-on process for a stronger bond than conventional spray-on coatings. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures during startup and operation.\u003c\/p\u003e\u003cp\u003eAdditional piston features include machined smooth heads that reflect combustion heat and help reduce carbon buildup, along with anodized domes engineered for increased heat resistance and durability. The kit is sized for a 79.97 mm piston application and is intended for use with compatible Polaris 700 models equipped with Nikasil cylinders. Verify engine configuration and cylinder type before installation.\u003c\/p\u003e\u003cp\u003eFitment includes the 2006-2009 Polaris Ranger 700 6X6, 2007 Polaris Ranger 700 4X4, 2004-2007 Polaris Sportsman 700 EFI 4X4, and 2005 Polaris Sportsman 700 4X4. Manufactured by Namura and supplied under vendor part number 186-5070C1, this top-end kit provides the core components required for dependable service and engine rebuilding.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit\u003c\/li\u003e\n\u003cli\u003e79.97 mm piston size for compatible Polaris 700 Nikasil cylinder applications\u003c\/li\u003e\n\u003cli\u003eMOS2 Teflon\/molybdenum-coated skirts help reduce friction, improve heat transfer, and minimize cold-seizure risk\u003c\/li\u003e\n\u003cli\u003eMachined smooth piston head helps reflect combustion heat and reduce carbon buildup\u003c\/li\u003e\n\u003cli\u003eAnodized piston dome improves heat resistance and durability\u003c\/li\u003e\n\u003cli\u003eHypereutectic casting process provides reduced expansion, increased wear resistance, and improved high-temperature capability\u003c\/li\u003e\n\u003cli\u003eFits select 2004-2009 Polaris Ranger 700 and Sportsman 700 models\u003c\/li\u003e\n\u003cli\u003eBrand: Namura\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: NA-50070-CK1\u003c\/li\u003e\n\u003cli\u003eVendor part number: 186-5070C1\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2004 Polaris Sportsman 700 4x4\u003cbr\u003e\n2004 Polaris Sportsman 700 Efi 4x4\u003cbr\u003e\n2005 Polaris Sportsman 700 4x4\u003cbr\u003e\n2005 Polaris Sportsman 700 Efi 4x4\u003cbr\u003e\n2006 Polaris Ranger 700 6X6\u003cbr\u003e\n2006 Polaris Sportsman 700 4x4\u003cbr\u003e\n2006 Polaris Sportsman 700 Efi 4x4\u003cbr\u003e\n2007 Polaris Ranger 700 4X4\u003cbr\u003e\n2007 Polaris Ranger 700 6X6\u003cbr\u003e\n2007 Polaris Sportsman 700 Efi 4x4\u003cbr\u003e\n2008 Polaris Ranger 700 4X4\u003cbr\u003e\n2008 Polaris Ranger 700 6X6\u003cbr\u003e\n2009 Polaris Ranger 700 4X4\u003cbr\u003e\n2009 Polaris Ranger 700 6X6","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67558607651051,"sku":"186-5070C1","price":270.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/896a-5d76d54e8282a.jpg?v=1790767601","url":"https:\/\/ctracingservices.com\/products\/namura-top-end-kit-for-polaris-700-nikasil-cylinder-79-97-mm-part-number-na-50070-ck1","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}