{"product_id":"namura-standard-bore-piston-kit-for-polaris-big-boss-250-4x6-6x6-1989-1993-72mm","title":"Namura Standard Bore Piston Kit for Polaris Big Boss 250 4x6 6x6 1989-1993 72mm","description":"\u003ch2\u003eStandard Bore Piston Kit (72mm) for Polaris Big Boss 250\u003c\/h2\u003e\u003cp\u003eThis Namura standard bore piston kit is a direct replacement for Polaris Big Boss 250 4x6 and 6x6 models from 1989 to 1993, restoring lost compression and power with a 72mm bore size.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis piston kit from Namura is designed for Polaris Big Boss 250 ATVs, delivering a reliable standard bore replacement that renews engine performance. It includes a high-strength piston, rings, wrist pin, and circlips, making it a complete solution for top-end rebuilds.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined 72mm piston from forged aluminum alloy\u003c\/li\u003e\n\u003cli\u003eMoly-coated skirt reduces friction and wear\u003c\/li\u003e\n\u003cli\u003eIncluded chrome-plated rings for improved seal and durability\u003c\/li\u003e\n\u003cli\u003eQuality wrist pin and circlips ensure secure installation\u003c\/li\u003e\n\u003cli\u003eTested to meet OEM specifications for reliable fit and function\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\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\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard (0.00mm over)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Engines\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 Does this piston kit include all necessary components? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit comes with the piston, rings, wrist pin, and circlips – everything needed for a standard bore rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this without removing the engine? \u003cstrong\u003eA:\u003c\/strong\u003e While possible on some models, we recommend removing the cylinder head and barrel for proper installation and inspection of the cylinder wall.\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":44890489323606,"sku":"SZ1F11826","price":136.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_a1fbfece-4d32-4f3d-901a-de5bee864e63.jpg?v=1781140566","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-piston-kit-for-polaris-big-boss-250-4x6-6x6-1989-1993-72mm","provider":"Solid Spare","version":"1.0","type":"link"}