{"product_id":"namura-060-over-bore-piston-kit-for-polaris-big-boss-250-4x6-6x6-1989-93-73-5mm","title":"Namura .060 Over Bore Piston Kit for Polaris Big Boss 250 4x6 6x6 1989-93 73.5mm","description":"\u003ch2\u003e.060 Over Bore Piston Kit for Polaris Big Boss 250\u003c\/h2\u003e\u003cp\u003eThis Namura .060 over bore piston kit is designed for Polaris Big Boss 250 4x6 and 6x6 models from 1989 to 1993, with a 73.5mm bore. It provides a precise oversize fit for cylinder reconditioning, restoring engine power and reliability. Ideal for rebuilding top ends on these classic workhorse ATVs.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .060 over bore piston kit from Namura is a direct replacement for Polaris Big Boss 250 4x6 and 6x6 ATVs (1989-1993) with a 73.5mm bore. It renews cylinder compression after overboring the cylinder. Perfect for bringing worn engines back to like-new condition.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHigh-strength aluminum alloy construction\u003c\/li\u003e\n\u003cli\u003ePrecision-machined for .060 overbore clearance\u003c\/li\u003e\n\u003cli\u003eMoly coated skirt minimizes friction\u003c\/li\u003e\n\u003cli\u003eQuality piston rings for optimal sealing\u003c\/li\u003e\n\u003cli\u003eIncludes wrist pin and circlips\u003c\/li\u003e\n\u003cli\u003eManufactured to exacting specifications\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\u003eHeavy utility work and trail maintenance\u003c\/li\u003e\n\u003cli\u003eFarm and ranch operations requiring reliable power\u003c\/li\u003e\n\u003cli\u003eOff-road recreational riding\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds for older model ATVs\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\u003e73.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.060 (1.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOver Bore Piston Kit\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 4x6\/6x6 (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 Will this .060 over piston kit work on a 1991 Polaris Big Boss 250 6x6? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it fits 1989-1993 Big Boss 250 4x6 and 6x6 models. Ensure your cylinder has been bored to 73.5mm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is included in this piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e The kit includes the piston, rings, wrist pin, and circlips. Always compare with your original components before 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":44890489552982,"sku":"SZ1F11833","price":136.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_c4ba7395-2e6f-48ad-8328-95fa50ef6504.jpg?v=1781140576","url":"https:\/\/www.solidspare.com\/products\/namura-060-over-bore-piston-kit-for-polaris-big-boss-250-4x6-6x6-1989-93-73-5mm","provider":"Solid Spare","version":"1.0","type":"link"}