{"product_id":"namura-040-over-bore-piston-rings-for-polaris-big-boss-250-4x6-6x6-1989-93-73mm","title":"Namura .040 Over Bore Piston Rings for Polaris Big Boss 250 4x6 6x6 1989-93 73mm","description":"\u003ch2\u003e.040 Over Bore Piston Rings for for Namura\u003c\/h2\u003e\u003cp\u003eThese .040 over bore piston rings for for Namura provide an essential seal for rebuilt 73mm bores on Polaris Big Boss 250 machines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eEngine builders select these .040 over bore piston rings for for Namura when restoring performance to worn Polaris engines. The .040 over bore piston rings for for Namura maintain critical combustion chamber pressure for reliable operation. Precision tolerances ensure these .040 over bore piston rings for for Namura perform under load.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDesigned for 73mm cylinder bores\u003c\/li\u003e\n\u003cli\u003eResists thermal fatigue\u003c\/li\u003e\n\u003cli\u003eHigh-precision manufacturing\u003c\/li\u003e\n\u003cli\u003eOptimized ring tension\u003c\/li\u003e\n\u003cli\u003eDurable metallurgical composition\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Polaris Big Boss 250 4x6 1989-1993\u003c\/li\u003e\n\u003cli\u003efor Polaris Big Boss 250 6x6 1989-1993\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine overhaul projects\u003c\/li\u003e\n\u003cli\u003eRestoring compression in heavy-duty utility quads\u003c\/li\u003e\n\u003cli\u003eImproving seal in aged cylinder bores\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\u003e73mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOver Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040\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 piston? \u003cstrong\u003eA:\u003c\/strong\u003e It is standard practice to use a matching oversized piston with these rings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do these rings handle heat? \u003cstrong\u003eA:\u003c\/strong\u003e These rings are designed to withstand the high temperatures of air-cooled 250cc engines.\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":44792299257942,"sku":"SZ1F02417","price":32.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_7e9198b8-67ea-405e-92dd-6da2eddd6343.jpg?v=1780066700","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-rings-for-polaris-big-boss-250-4x6-6x6-1989-93-73mm","provider":"Solid Spare","version":"1.0","type":"link"}