{"product_id":"2-spi-040-over-bore-piston-kits-for-polaris-500-snow-1985-2006-488cc-73mm","title":"2 SPI .040 Over Bore Piston Kits for Polaris 500 Snow 1985-2006 488cc 73mm","description":"\u003ch2\u003e.040 Over Bore Piston Kits for Polaris\u003c\/h2\u003e\u003cp\u003eThis pair of SPI .040 over bore piston kits is designed for Polaris 500 Snow engines from 1985-2006, offering a 73mm bore size and 488cc displacement for reliable engine rebuilds.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThese SPI .040 over bore piston kits provide a direct replacement for worn pistons in Polaris 500 Snow snowmobiles built between 1985 and 2006. Each kit includes one piston and rings, sized at 73mm (0.040 over) to restore compression and performance after cylinder boring. Perfect for the 488cc engine family, these kits help bring older Polaris snowmobile engines back to life.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast from high-silicon aluminum alloy for thermal stability\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves reduce blow-by\u003c\/li\u003e\n\u003cli\u003eOversized 73mm (.040 over) compensates for cylinder wear\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings for complete top-end rebuild\u003c\/li\u003e\n\u003cli\u003eWeight-matched for balanced engine operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris 500 Snow (488cc, 73mm bore) – 1985 to 2006 models\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine overhaul and top-end rebuilds\u003c\/li\u003e\n\u003cli\u003eRestoring compression in high-mileage snowmobiles\u003c\/li\u003e\n\u003cli\u003eTrail riding and recreational snowmobile use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSPI 73mm .040 over piston kit (2 kits included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e73mm (.040 over stock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e488cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 piston kits\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 Do these pistons include wrist pins? \u003cstrong\u003eA:\u003c\/strong\u003e Each piston kit typically includes the piston, rings, and wrist pin; please confirm with your engine's specifications before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Are these for a standard bore or overbore? \u003cstrong\u003eA:\u003c\/strong\u003e These are .040 over size (73mm) and require the cylinder to be bored accordingly; they are not for standard bore engines.\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":44949783609430,"sku":"SZ1F14808","price":241.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_b05720e8-f433-443b-92b9-e86c30b364d0.jpg?v=1781398914","url":"https:\/\/www.solidspare.com\/products\/2-spi-040-over-bore-piston-kits-for-polaris-500-snow-1985-2006-488cc-73mm","provider":"Solid Spare","version":"1.0","type":"link"}