{"product_id":"namura-standard-bore-top-end-kit-for-polaris-trail-boss-250-1985-1999-72mm","title":"Namura Standard Bore Top End Kit for Polaris Trail Boss 250 1985-1999 72mm","description":"\u003ch2\u003eNamura Standard Bore Top End Kit for Polaris Trail Boss 250 1985-1999 72mm\u003c\/h2\u003e\u003cp\u003eThis top end kit provides all components needed to rebuild the cylinder of a Polaris Trail Boss 250 (1985-1999) with standard bore 72mm piston, restoring engine performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura Standard Bore Top End Kit is designed for the Polaris Trail Boss 250 models produced from 1985 to 1999. It includes a 72mm piston, rings, wrist pin, circlips, and gaskets to replace worn top-end parts. This kit is ideal for maintaining the original bore size and getting your ATV back on the trail.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStandard 72mm piston for factory specification rebuilds\u003c\/li\u003e\n\u003cli\u003eDurable cast aluminum construction matched to OEM tolerances\u003c\/li\u003e\n\u003cli\u003ePrecision-ground ring set for consistent compression\u003c\/li\u003e\n\u003cli\u003eIncludes wrist pin and circlips for secure piston attachment\u003c\/li\u003e\n\u003cli\u003eComplete gasket set for a reliable seal\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\u003eRebuilding top end of a Polaris Trail Boss 250 engine\u003c\/li\u003e\n\u003cli\u003eRestoring compression and power after normal wear\u003c\/li\u003e\n\u003cli\u003eMaintaining a stock bore ATV for recreational or utility use\u003c\/li\u003e\n\u003cli\u003ePerforming a preventive top-end refresh on older models\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\u003e72mm (Standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris Trail Boss 250 1985-1999\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 Does this kit work on other Polaris 250 2-stroke models? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is specifically designed for the Polaris Trail Boss 250; other models may require a different piston size or stroke, so always confirm your engine specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the cylinder head included? \u003cstrong\u003eA:\u003c\/strong\u003e No, this is a top end repair kit that includes piston, rings, pin, clips, and gaskets; cylinder head and cylinder must be reused or sourced separately.\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":44890883391574,"sku":"SZ1F13469","price":171.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_2d41f32c-3b13-4e42-84d8-8a3cb2c8b1f8.jpg?v=1781144159","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-top-end-kit-for-polaris-trail-boss-250-1985-1999-72mm","provider":"Solid Spare","version":"1.0","type":"link"}