{"product_id":"namura-020-over-bore-piston-kit-for-polaris-trail-blazer-250-1990-2006-72-5mm","title":"Namura .020 Over Bore Piston Kit for Polaris Trail Blazer 250 1990-2006 72.5mm","description":"\u003ch2\u003eNamura .020 Over Bore Piston Kit for Polaris Trail Blazer 250\u003c\/h2\u003e\u003cp\u003eThis Namura .020 over bore piston kit is a direct replacement piston assembly for Polaris Trail Blazer 250 models from 1990 to 2006, featuring a 72.5mm bore diameter to restore compression and performance after cylinder overbore.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura .020 over bore piston kit for Polaris Trail Blazer 250 provides a precision-machined piston with rings and pin, engineered to match the factory specifications for 1990-2006 Trail Blazer 250 engines. This overbore piston kit allows you to refresh your top end when standard bore is no longer viable, delivering reliable power and longevity for your Polaris ATV.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-cast piston for consistent expansion and heat transfer\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings, wrist pin, and circlips for a complete top-end rebuild\u003c\/li\u003e\n\u003cli\u003e.020 inch oversize (72.5mm) compensates for cylinder wear\u003c\/li\u003e\n\u003cli\u003eMatching skirt profile reduces piston slap and noise\u003c\/li\u003e\n\u003cli\u003eDesigned to meet or exceed OEM specifications for Polaris engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris Trail Blazer 250 (1990-2006)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTrail riding and recreational off-roading\u003c\/li\u003e\n\u003cli\u003eUtility and farm use requiring reliable engine performance\u003c\/li\u003e\n\u003cli\u003eRestoration of vintage Polaris Trail Blazer 250 quads\u003c\/li\u003e\n\u003cli\u003eTop-end rebuild during routine engine maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOverbore Piston Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e72.5mm (.020 over)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris Trail Blazer 250 1990-2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, pin, circlips\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 kit fit my Polaris Trail Blazer 250 if it has not been bored? \u003cstrong\u003eA:\u003c\/strong\u003e This .020 over bore kit is intended for cylinders that have been bored 0.020 inch oversize; it will not fit a standard bore cylinder. Always measure your cylinder before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need any additional parts to complete the installation? \u003cstrong\u003eA:\u003c\/strong\u003e You will need a new head gasket, base gasket, and possibly a new cylinder if wear exceeds the overbore limit. We recommend replacing the piston pin bearing at the same time.\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":44890489782358,"sku":"SZ1F11840","price":136.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_01f6956f-0eb4-4c94-9c01-d2d9057d1c42.jpg?v=1781140586","url":"https:\/\/www.solidspare.com\/products\/namura-020-over-bore-piston-kit-for-polaris-trail-blazer-250-1990-2006-72-5mm","provider":"Solid Spare","version":"1.0","type":"link"}