{"product_id":"2-spi-020-over-bore-piston-kits-fits-arctic-cat-many-1976-1988-500-sleds-70-5mm","title":"2 SPI .020 Over Bore Piston Kits fits Arctic Cat Many 1976-1988 500 Sleds 70.5mm","description":"\u003ch2\u003e2 SPI .020 Over Bore Piston Kits for Arctic Cat\u003c\/h2\u003e\u003cp\u003eThis set of two over bore piston kits, sized at 70.5mm, provides replacement pistons for many 1976-1988 Arctic Cat 500 snowmobile engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThese SPI piston kits are designed for .020 over bore applications in Arctic Cat 500 series snowmobiles, offering a direct fit for rebuilding engines across multiple model years from 1976 through 1988. Each kit includes the piston, rings, wrist pin, and circlips, delivering a complete solution for restoring compression and performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMachined from high-strength aluminum alloy for durability and heat resistance\u003c\/li\u003e\n\u003cli\u003e.020 over bore (70.5mm) corrects worn cylinder walls\u003c\/li\u003e\n\u003cli\u003ePrecision-ground ring grooves ensure optimal ring seal\u003c\/li\u003e\n\u003cli\u003eFull floating wrist pin with circlips reduces friction\u003c\/li\u003e\n\u003cli\u003eBalanced design minimizes vibration under load\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Arctic Cat 500 snowmobiles (1976-1988)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine rebuilding for vintage Arctic Cat sleds\u003c\/li\u003e\n\u003cli\u003eRestoration of 500cc two-stroke engines\u003c\/li\u003e\n\u003cli\u003ePerformance restoration after cylinder overboring\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\u003e70.5mm (0.020 over)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eArctic Cat 500 snowmobiles (1976-1988)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, pin, circlips (2 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 Are these pistons compatible with standard bore cylinders? \u003cstrong\u003eA:\u003c\/strong\u003e No, these are specifically for cylinders that have been bored 0.020 oversize; they will not fit standard bore dimensions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do the kits include gaskets? \u003cstrong\u003eA:\u003c\/strong\u003e No, these are piston-only kits; you will need a separate top-end gasket set for assembly.\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":44949833187414,"sku":"SZ1F15480","price":296.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_aec20079-8ab1-4bb3-88f0-e8995a64cce2.jpg?v=1781399820","url":"https:\/\/www.solidspare.com\/products\/2-spi-020-over-bore-piston-kits-fits-arctic-cat-many-1976-1988-500-sleds-70-5mm","provider":"Solid Spare","version":"1.0","type":"link"}