{"product_id":"namura-060-over-bore-piston-kit-for-polaris-1990-1993-350-2-stroke-atv-s-81-5mm","title":"Namura .060 Over Bore Piston Kit for Polaris 1990-1993 350 2-Stroke ATV's 81.5mm","description":"\u003ch2\u003eNamura .060 Over Bore Piston Kit for Polaris\u003c\/h2\u003e\u003cp\u003eThis Namura .060 over bore piston kit is a direct replacement piston assembly for Polaris 350cc 2-stroke ATV engines from 1990 to 1993, featuring an 81.5mm bore size to restore compression and performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura .060 over bore piston kit is designed for Polaris 350cc 2-stroke ATVs, offering an 81.5mm oversized piston to renew worn cylinders. It provides a reliable rebuild option for vintage Polaris 350 ATV engines, ensuring strong power delivery and longevity. This piston kit is ideal for enthusiasts restoring or maintaining their Polaris 1990-1993 350 2-stroke ATVs.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOversized .060 over bore piston for increased displacement and compression\u003c\/li\u003e\n\u003cli\u003ePremium aluminum alloy construction for strength and heat dissipation\u003c\/li\u003e\n\u003cli\u003ePrecision-machined 81.5mm diameter for accurate fit\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings and wrist pin for complete installation\u003c\/li\u003e\n\u003cli\u003eDesigned for Polaris 350cc 2-stroke engines\u003c\/li\u003e\n\u003cli\u003eDirect replacement without modification in compatible engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris 350 2-Stroke ATV (1990-1993)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTrail riding and recreational ATV use\u003c\/li\u003e\n\u003cli\u003eMudding and off-road adventures\u003c\/li\u003e\n\u003cli\u003eRestoration of vintage Polaris 350 ATVs\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds and overhauls\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\u003e81.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e350cc 2-Stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris 1990-1993 350 ATV\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 Do I need to replace the cylinder with this piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e Typically the cylinder can be re-used if it is within spec for the .060 overbore, but you should have it honed or bored to match the new piston size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this piston kit work with the original Polaris head gasket? \u003cstrong\u003eA:\u003c\/strong\u003e The original head gasket may still be used, but we recommend replacing it with a new one during the rebuild for a proper seal.\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":44890923040854,"sku":"SZ1F13577","price":175.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_73769225-95f1-4e3a-9067-23c259631ef3.jpg?v=1781144299","url":"https:\/\/www.solidspare.com\/products\/namura-060-over-bore-piston-kit-for-polaris-1990-1993-350-2-stroke-atv-s-81-5mm","provider":"Solid Spare","version":"1.0","type":"link"}