{"product_id":"2-spi-030-over-bore-piston-kits-for-polaris-500-snow-1985-2006-488cc-72-75mm","title":"2 SPI .030 Over Bore Piston Kits for Polaris 500 Snow 1985-2006 488cc 72.75mm","description":"\u003ch2\u003eSPI .030 Over Bore Piston Kits for Polaris 500 Snow\u003c\/h2\u003e\u003cp\u003eThese SPI .030 over bore piston kits for Polaris 500 snowmobiles replace the original pistons in 1985-2006 488cc engines, sized at 72.75mm with OEM cross-reference numbers 3080422, 4040393, and 4040444.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThese SPI .030 over bore piston kits for Polaris 500 snowmobiles provide a precision fit for 488cc engines from 1985-2006, restoring compression and power during a top-end rebuild. Each kit includes the piston, rings, wrist pin, and circlips, making this piston kit a complete solution for Polaris 500 snowmobile engine restoration.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e72.75mm diameter matched to .030 oversize bore\u003c\/li\u003e\n\u003cli\u003eCast aluminum piston for reliable daily operation\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings, wrist pin, and circlips for full rebuild\u003c\/li\u003e\n\u003cli\u003eDesigned to match OEM specifications for 488cc Polaris engines\u003c\/li\u003e\n\u003cli\u003eDurable ring set ensures proper cylinder sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Polaris 500 snowmobile 1985-2006\u003c\/li\u003e\n\u003cli\u003efor Polaris 488cc engine family\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePerfect for rebuilding worn-out Polaris 500 snowmobile engines\u003c\/li\u003e\n\u003cli\u003eUsed during top-end overhauls to restore lost compression\u003c\/li\u003e\n\u003cli\u003eCommonly installed in trail and utility snowmobiles requiring bore repair\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 .030 Over Bore Piston Kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e72.75mm (.030 Over)\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\u003eKit Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Wrist Pin, Circlips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOEM Cross-Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3080422, 4040393, 4040444\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Polaris 500 Snowmobile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1985-2006\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 I need to hone the cylinder before installing these piston kits? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the cylinder must be honed or bored to the matching .030 over specification to ensure correct ring seal and proper clearance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will these pistons work in any Polaris 500 model from 1985-2006? \u003cstrong\u003eA:\u003c\/strong\u003e These piston kits fit Polaris 500 snowmobiles with the 488cc engine; verify your engine code and cylinder bore condition before ordering.\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":44949780332630,"sku":"SZ1F14767","price":241.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_0bc7c714-bfac-4fbe-9f3c-de2a4d48f3e5.jpg?v=1781398868","url":"https:\/\/www.solidspare.com\/products\/2-spi-030-over-bore-piston-kits-for-polaris-500-snow-1985-2006-488cc-72-75mm","provider":"Solid Spare","version":"1.0","type":"link"}