{"product_id":"namura-standard-bore-top-end-kit-for-polaris-big-boss-250-4x6-6x6-1989-1993-72mm","title":"Namura Standard Bore Top End Kit for Polaris Big Boss 250 4x6 6x6 1989-1993 72mm","description":"\u003ch2\u003eStandard Bore Top End Kit for Polaris\u003c\/h2\u003e\u003cp\u003eThis Namura Standard Bore Top End Kit provides all necessary components to rebuild the top end of a Polaris Big Boss 250 engine. Designed for 1989-1993 models, this 72mm bore kit restores compression and power. The Standard Bore Top End Kit is a reliable replacement for worn-out pistons, rings, and gaskets.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Namura Standard Bore Top End Kit is a direct-fit aftermarket top end assembly for Polaris Big Boss 250 utility vehicles from 1989 to 1993. It includes a piston, rings, wrist pin, circlips, and gaskets to completely rebuild the cylinder. The 72mm standard bore size ensures compatibility with the original cylinder.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIncludes complete piston, rings, wrist pin, and circlips\u003c\/li\u003e\n\u003cli\u003eMachined to precise tolerances for consistent compression\u003c\/li\u003e\n\u003cli\u003eHeat-treated components for long-term durability\u003c\/li\u003e\n\u003cli\u003eDirect fit for Polaris Big Boss 250 4x6 and 6x6 models\u003c\/li\u003e\n\u003cli\u003eKit includes all necessary gaskets for installation\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\u003eUsed for agricultural and utility work\u003c\/li\u003e\n\u003cli\u003eDesigned for off-road trail riding\u003c\/li\u003e\n\u003cli\u003eRestores engine power on aging Big Boss models\u003c\/li\u003e\n\u003cli\u003eCommonly used in recreational off-road driving\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris Big Boss 250 (1989-1993)\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 Is this kit compatible with 4x6 and 6x6 models? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it fits both Polaris Big Boss 250 4x6 and 6x6 models from 1989 to 1993.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What gaskets are included? \u003cstrong\u003eA:\u003c\/strong\u003e The kit includes all necessary base and head gaskets for a complete installation.\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":44890825293910,"sku":"SZ1F13435","price":171.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_f1a81a90-be95-4112-a304-c0fe62235333.jpg?v=1781144117","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-top-end-kit-for-polaris-big-boss-250-4x6-6x6-1989-1993-72mm","provider":"Solid Spare","version":"1.0","type":"link"}