{"product_id":"namura-na-50004-6k-top-end-kit-93-47-mm-11-1-compression-for-polaris-500-models","title":"Namura NA-50004-6K Top End Kit 93.47 mm, 11:1 Compression for Polaris 500 Models","description":"\u003cp\u003eRestore top-end performance with the Namura NA-50004-6K Top End Kit, designed for select Polaris 500 ATV applications. This complete kit includes a piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit for a convenient rebuild solution. The 93.47 mm piston size and 11:1 compression ratio are engineered to support reliable fitment and performance when servicing compatible engines.\u003c\/p\u003e\u003cp\u003eThe piston features MOS2, or Teflon and molybdenum, coated skirts applied through a rolled-on process for a strong, durable bond. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures. Machined smooth piston heads help reflect combustion heat and reduce carbon buildup, while anodized domes improve heat resistance and durability.\u003c\/p\u003e\u003cp\u003eNamura uses a hypereutectic casting process that increases silicon content to help control expansion, improve wear resistance, and withstand elevated cylinder temperatures. These features make the NA-50004-6K a dependable choice for top-end engine service and replacement.\u003c\/p\u003e\u003cp\u003eFitment includes the 1998 and 1999 Polaris Big Boss 500 6X6; 1997 Polaris Xplorer 500 4X4; and 2000 through 2006 Polaris Scrambler 500 4X4 models. Verify the model year, engine configuration, piston size, and compression requirements before installation.\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\u003ePiston Size: 93.47 mm piston designed for compatible Polaris 500 engine applications.\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 11:1 compression configuration for select Polaris 500 models.\u003c\/li\u003e\n\u003cli\u003eMOS2-Coated Skirts: Teflon and molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk.\u003c\/li\u003e\n\u003cli\u003eMachined Smooth Head: Helps reflect combustion heat and reduce carbon buildup on the piston crown.\u003c\/li\u003e\n\u003cli\u003eAnodized Dome: Improves heat resistance and piston durability.\u003c\/li\u003e\n\u003cli\u003eHypereutectic Construction: Higher silicon content helps reduce expansion, improve wear resistance, and withstand higher cylinder temperatures.\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 1998-1999 Polaris Big Boss 500 6X6, 1997 Polaris Xplorer 500 4X4, and 2000-2006 Polaris Scrambler 500 4X4.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1996 Polaris Sportsman 500 4X4\u003cbr\u003e\n1997 Polaris Scrambler 500 4X4\u003cbr\u003e\n1997 Polaris Sportsman 500 4X4\u003cbr\u003e\n1997 Polaris Xplorer 500 4X4\u003cbr\u003e\n1998 Polaris Big Boss 500 6X6\u003cbr\u003e\n1998 Polaris Scrambler 500 4X4\u003cbr\u003e\n1998 Polaris Sportsman 500 4X4\u003cbr\u003e\n1999 Polaris Big Boss 500 6X6\u003cbr\u003e\n1999 Polaris Magnum 500 4X4\u003cbr\u003e\n1999 Polaris Scrambler 500 4X4\u003cbr\u003e\n1999 Polaris Sportsman 500 4X4\u003cbr\u003e\n2000 Polaris Magnum 500 4X4\u003cbr\u003e\n2000 Polaris Scrambler 500 4X4\u003cbr\u003e\n2000 Polaris Sportsman 500 4X4\u003cbr\u003e\n2001 Polaris Magnum 500 4X4\u003cbr\u003e\n2001 Polaris Ranger 500 4X4\u003cbr\u003e\n2001 Polaris Scrambler 500 2X4\u003cbr\u003e\n2001 Polaris Scrambler 500 4X4\u003cbr\u003e\n2002 Polaris Magnum 500 2X4\u003cbr\u003e\n2002 Polaris Magnum 500 4X4\u003cbr\u003e\n2002 Polaris Ranger 500 4X4\u003cbr\u003e\n2002 Polaris Scrambler 500 2X4\u003cbr\u003e\n2002 Polaris Scrambler 500 4X4\u003cbr\u003e\n2003 Polaris Magnum 500 4X4\u003cbr\u003e\n2003 Polaris Ranger 500 4X4\u003cbr\u003e\n2003 Polaris Scrambler 500 4X4\u003cbr\u003e\n2004 Polaris Atp 500\u003cbr\u003e\n2004 Polaris Ranger 500 4X4\u003cbr\u003e\n2004 Polaris Scrambler 500 4X4\u003cbr\u003e\n2005 Polaris Atp 500\u003cbr\u003e\n2005 Polaris Ranger 500 2X4\u003cbr\u003e\n2005 Polaris Ranger 500 4X4\u003cbr\u003e\n2005 Polaris Scrambler 500 4X4\u003cbr\u003e\n2006 Polaris Ranger 500 2X4\u003cbr\u003e\n2006 Polaris Ranger 500 4X4\u003cbr\u003e\n2006 Polaris Scrambler 500 4X4\u003cbr\u003e\n2007 Polaris Ranger 500 2X4\u003cbr\u003e\n2007 Polaris Ranger 500 4X4\u003cbr\u003e\n2007 Polaris Scrambler 500 4X4\u003cbr\u003e\n2008 Polaris Ranger 500 2X4\u003cbr\u003e\n2008 Polaris Scrambler 500 4X4\u003cbr\u003e\n2009 Polaris Scrambler 500 4X4\u003cbr\u003e\n2010 Polaris Scrambler 500 4X4\u003cbr\u003e\n2011 Polaris Scrambler 500 4X4\u003cbr\u003e\n2012 Polaris Scrambler 500 4X4","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67558674956523,"sku":"186-50046","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/dd77-572a583cd9540_f19caef6-eec1-466e-b7e8-ac5b9a27cd67.jpg?v=1790768588","url":"https:\/\/ctracingservices.com\/products\/namura-na-50004-6k-top-end-kit-93-47-mm-11-1-compression-for-polaris-500-models","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}