{"product_id":"namura-040-over-bore-piston-kit-for-polaris-570-sportsman-rzr-ranger-100mm","title":"Namura .040 Over Bore Piston Kit for Polaris 570 Sportsman, RZR \u0026 Ranger 100mm","description":"\u003ch2\u003e.040 Over Bore Piston Kit for Polaris 570 Sportsman, RZR \u0026amp; Ranger\u003c\/h2\u003e\u003cp\u003eThis aftermarket .040 over bore piston kit for Polaris 570 Sportsman, RZR, and Ranger models provides a 100mm replacement piston designed to restore compression and performance in worn engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .040 over bore piston kit is a direct replacement for Polaris 570 Sportsman, RZR, and Ranger engines, offering a 100mm bore size to refresh top-end power. It includes a piston, rings, and wrist pin for a complete rebuild. Ideal for restoring lost compression and reducing oil consumption in high-mileage machines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined 100mm piston with .040 overbore for tight cylinder clearance\u003c\/li\u003e\n\u003cli\u003eHigh-strength aluminum alloy construction for durability under load\u003c\/li\u003e\n\u003cli\u003eIncludes premium piston rings for optimal sealing and reduced blow-by\u003c\/li\u003e\n\u003cli\u003eWrist pin with retention clips for secure installation\u003c\/li\u003e\n\u003cli\u003eDesigned to meet or exceed OEM specifications for reliable performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Polaris Sportsman 570 (all years using 100mm bore)\u003c\/li\u003e\n\u003cli\u003efor Polaris RZR 570 (all years using 100mm bore)\u003c\/li\u003e\n\u003cli\u003efor Polaris Ranger 570 (all years using 100mm bore)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTrail riding and recreational off-road use\u003c\/li\u003e\n\u003cli\u003eUtility farming and ranching tasks requiring reliable engine power\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds for ATVs and side-by-sides needing top-end refresh\u003c\/li\u003e\n\u003cli\u003eRacing or high-performance applications where consistent power is critical\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-strength aluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this piston fit my Polaris 570 without additional machining? \u003cstrong\u003eA:\u003c\/strong\u003e This .040 over bore piston requires the cylinder to be bored to the correct clearance for the new piston. Professional machining is recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I use this piston kit for a complete engine rebuild? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this kit includes the piston, rings, wrist pin, and clips needed for a top-end rebuild. Always replace the cylinder bore and check ring end gap per service manual.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44949764210774,"sku":"SZ1F14368","price":208.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_846345eb-dfe7-4cd2-92e8-6e60f9c17918.jpg?v=1781398367","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-kit-for-polaris-570-sportsman-rzr-ranger-100mm","provider":"Solid Spare","version":"1.0","type":"link"}