{"product_id":"namura-na-50000-4-72-96-mm-1-00-mm-piston-kit-for-polaris-250-atv","title":"Namura NA-50000-4 72.96 mm +1.00 mm Piston Kit for Polaris 250 ATV","description":"Will not accept OEM rings and rings will not work on OEM piston\n\u003cp\u003eThe Namura NA-50000-4 piston kit is designed for select Polaris 250 ATV applications requiring a 72.96 mm piston with a +1.00 mm oversize specification. Manufactured by Namura, this replacement piston kit supports dependable engine service and is intended for rebuilds where the cylinder has been appropriately bored and finished for the specified piston size.\u003c\/p\u003e\u003cp\u003eThis kit fits the 1991 and 1992 Polaris Big Boss 250 6X6, as well as the 1988 through 1993 Polaris Trail Boss 250 2X4 and the 1989 and 1990 Polaris Trail Boss 250 4X4. Confirm the model year, engine configuration, bore specification, and service requirements before installation to ensure proper application and clearance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The Namura NA-50000-4 piston kit will not accept OEM piston rings, and the supplied rings are not compatible with an OEM piston. Use the matching rings and components intended for this Namura piston kit. Professional installation and measurement of the cylinder, piston-to-cylinder clearance, ring end gap, and related engine components are recommended for proper performance and service life.\u003c\/p\u003e\u003cp\u003eManufacturer: Namura. Vendor part number: NA-50000-4. This piston kit is a direct replacement-style component for the listed Polaris applications and is intended for use during engine repair or overhaul work.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 72.96 mm piston with +1.00 mm oversize specification\u003c\/li\u003e\n\u003cli\u003eModel: Polaris Big Boss 250 6X6 and Trail Boss 250 2X4 or 4X4 applications\u003c\/li\u003e\n\u003cli\u003eBrand: Namura\u003c\/li\u003e\n\u003cli\u003eManufacturer: Namura\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: NA-50000-4\u003c\/li\u003e\n\u003cli\u003eVendor part number: NA-50000-4\u003c\/li\u003e\n\u003cli\u003eFitment: 1991-1992 Polaris Big Boss 250 6X6\u003c\/li\u003e\n\u003cli\u003eFitment: 1988-1993 Polaris Trail Boss 250 2X4\u003c\/li\u003e\n\u003cli\u003eFitment: 1989-1990 Polaris Trail Boss 250 4X4\u003c\/li\u003e\n\u003cli\u003eCompatibility: Will not accept OEM piston rings, and Namura rings will not work on an OEM piston\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1985 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1986 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1987 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1987 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1988 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1988 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1988 Polaris Trail Boss 250R\/Es\u003cbr\u003e\n1989 Polaris Big Boss 250 4X6\u003cbr\u003e\n1989 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1989 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1990 Polaris Big Boss 250 4X6\u003cbr\u003e\n1990 Polaris Trail Blazer 250\u003cbr\u003e\n1990 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1990 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1991 Polaris Big Boss 250 4X6\u003cbr\u003e\n1991 Polaris Big Boss 250 6X6\u003cbr\u003e\n1991 Polaris Trail Blazer 250\u003cbr\u003e\n1991 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1991 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1992 Polaris Big Boss 250 4X6\u003cbr\u003e\n1992 Polaris Big Boss 250 6X6\u003cbr\u003e\n1992 Polaris Trail Blazer 250\u003cbr\u003e\n1992 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1992 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1993 Polaris Trail Blazer 250\u003cbr\u003e\n1993 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1993 Polaris Trail Boss 250 4X4\u003cbr\u003e\n1994 Polaris Trail Blazer 250\u003cbr\u003e\n1994 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1995 Polaris Trail Blazer 250\u003cbr\u003e\n1995 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1996 Polaris Trail Blazer 250\u003cbr\u003e\n1996 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1997 Polaris Trail Blazer 250\u003cbr\u003e\n1997 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1998 Polaris Trail Blazer 250\u003cbr\u003e\n1998 Polaris Trail Boss 250 2X4\u003cbr\u003e\n1999 Polaris Trail Blazer 250\u003cbr\u003e\n1999 Polaris Trail Boss 250 2X4\u003cbr\u003e\n2000 Polaris Trail Blazer 250\u003cbr\u003e\n2000 Polaris Xplorer 250 4X4\u003cbr\u003e\n2001 Polaris Trail Blazer 250\u003cbr\u003e\n2001 Polaris Xplorer 250 4X4\u003cbr\u003e\n2002 Polaris Trail Blazer 250\u003cbr\u003e\n2002 Polaris Xplorer 250 4X4\u003cbr\u003e\n2003 Polaris Trail Blazer 250\u003cbr\u003e\n2004 Polaris Trail Blazer 250\u003cbr\u003e\n2005 Polaris Trail Blazer 250\u003cbr\u003e\n2006 Polaris Trail Blazer 250","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67557471224043,"sku":"187-500004","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/269e-5e99e0305793e_f3bba8c1-77f4-4e1a-bba3-0a4c5f302a7b.jpg?v=1790754373","url":"https:\/\/ctracingservices.com\/products\/namura-na-50000-4-72-96-mm-1-00-mm-piston-kit-for-polaris-250-atv","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}