{"product_id":"spi-040-over-bore-top-end-repair-kit-for-ski-doo-550-fan-cooled-2003-2020-77mm","title":"SPI .040 Over Bore Top End Repair Kit for Ski-Doo 550 Fan Cooled 2003-2020 77mm","description":"\u003ch2\u003eSPI .040 Over Bore Top End Repair Kit for Ski‑Doo 550 Fan Cooled\u003c\/h2\u003e\u003cp\u003eThis top end repair kit includes a .040 over bore piston, rings, and gaskets to restore compression and performance on Ski‑Doo 550 fan‑cooled engines. The kit is precision‑engineered to match OEM specifications for a reliable rebuild.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis SPI .040 over bore top end repair kit is designed for Ski‑Doo 550 fan‑cooled snowmobile engines from 2003 to 2020. It contains everything needed to refresh the cylinder, piston, and sealing surfaces after a bore job. The kit provides a cost‑effective way to bring back lost power and reliability to your two‑stroke engine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIncludes .040 over bore piston matched to 77mm bore\u003c\/li\u003e\n\u003cli\u003eHigh‑strength cast piston with precision ring grooves\u003c\/li\u003e\n\u003cli\u003eComplete gasket set for a leak‑free seal\u003c\/li\u003e\n\u003cli\u003ePlated rings reduce break‑in time\u003c\/li\u003e\n\u003cli\u003eEngineered for consistent compression across operating temps\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Ski‑Doo 550 Fan Cooled (2003‑2020) 77mm bore\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn‑The‑Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSnowmobile engine rebuild after wear or seizure\u003c\/li\u003e\n\u003cli\u003ePerformance restoration for trail riding\u003c\/li\u003e\n\u003cli\u003eWinter utility use requiring reliable starting\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\u003e77mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOver Bore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 inches (1.016 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Engine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSki‑Doo 550 Fan Cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYears\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2003‑2020\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 Does this kit include a wrist pin and circlips? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit typically includes the wrist pin, circlips, and all necessary seals for a complete top end rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this .040 over bore kit be used on any 550 fan‑cooled engine? \u003cstrong\u003eA:\u003c\/strong\u003e It is specifically designed for the Ski‑Doo 550 fan‑cooled engine with a 77mm bore; confirm your engine stamping before ordering.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44949850783830,"sku":"SZ1F15966","price":351.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_0201511b-86c5-4392-aec8-44485851d53f.jpg?v=1781400983","url":"https:\/\/www.solidspare.com\/products\/spi-040-over-bore-top-end-repair-kit-for-ski-doo-550-fan-cooled-2003-2020-77mm","provider":"Solid Spare","version":"1.0","type":"link"}