{"product_id":"namura-040-over-bore-piston-rings-for-polaris-trail-boss-250-1985-1999-73mm","title":"Namura .040 Over Bore Piston Rings for Polaris Trail Boss 250 1985-1999 73mm","description":"\u003ch2\u003e.040 Over Bore Piston Rings for Polaris\u003c\/h2\u003e\u003cp\u003eThese .040 over bore piston rings provide the necessary compression seal for rebuilt engines. These .040 over bore piston rings are manufactured for durability in two-stroke engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe .040 over bore piston rings are required when the cylinder has been bored out to accommodate a larger piston. Installing new .040 over bore piston rings restores power and prevents blow-by in the combustion chamber. Precision engineering makes these .040 over bore piston rings a standard choice for engine repair.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHeat resistant alloy construction\u003c\/li\u003e\n\u003cli\u003ePrecision sizing for bore clearance\u003c\/li\u003e\n\u003cli\u003eOptimized tension for compression sealing\u003c\/li\u003e\n\u003cli\u003eEngineered for high-RPM operation\u003c\/li\u003e\n\u003cli\u003eDurable against ring groove wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris Trail Boss 250 1985-1999\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine top end rebuilds\u003c\/li\u003e\n\u003cli\u003eCylinder machining projects\u003c\/li\u003e\n\u003cli\u003eRestoring compression lost to wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 Over Bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e73mm\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 hone the cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, a proper hone pattern is necessary to seat new rings correctly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Are these for a stock piston? \u003cstrong\u003eA:\u003c\/strong\u003e No, these are specifically sized for an .040 overbore piston.\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":44792277991510,"sku":"SZ1F02031","price":32.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_8ac72d9d-8367-440b-b0c6-686d65e19bdc.jpg?v=1780066164","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-rings-for-polaris-trail-boss-250-1985-1999-73mm","provider":"Solid Spare","version":"1.0","type":"link"}