{"product_id":"2-spi-040-over-bore-piston-kits-fits-ski-doo-mxz-670-ho-summit-x-670-ho-79mm","title":"2 SPI .040 Over Bore Piston Kits fits Ski-Doo MXZ 670 HO \u0026 Summit X 670 HO 79mm","description":"\u003ch2\u003eSPI .040 Over Bore Piston Kits for Ski-Doo\u003c\/h2\u003e\u003cp\u003eThese two SPI .040 over bore piston kits provide a high-performance replacement for Ski-Doo MXZ 670 HO and Summit X 670 HO snowmobiles, featuring a 79mm bore size for increased displacement and power.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThese SPI .040 over bore piston kits are designed to restore or enhance engine performance in compatible Ski-Doo two-stroke engines. Each kit includes two pistons with rings and wrist pins, allowing a precise .040 oversize fit for a fresh cylinder bore. They are ideal for rebuilding an MXZ 670 HO or Summit X 670 HO engine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eManufactured from high-strength aluminum alloy for durability\u003c\/li\u003e\n\u003cli\u003ePrecision-machined to .040 over bore specification for accurate fitment\u003c\/li\u003e\n\u003cli\u003eIncludes complete ring set for proper compression and oil control\u003c\/li\u003e\n\u003cli\u003eWrist pin and circlips included for straightforward installation\u003c\/li\u003e\n\u003cli\u003eBalanced to reduce vibration at high RPM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Ski-Doo MXZ 670 HO\u003c\/li\u003e\n\u003cli\u003efor Ski-Doo Summit X 670 HO\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSnowmobile engine rebuilds\u003c\/li\u003e\n\u003cli\u003ePerformance restoration for high-output two-stroke motors\u003c\/li\u003e\n\u003cli\u003eTrail riding and mountain riding applications\u003c\/li\u003e\n\u003cli\u003eCompetitive snowmobiling where power matters\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\u003e79mm (0.040 over)\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\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFits Engine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSki-Doo 670 HO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSPI .040 Over Bore\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 Can these piston kits be used in other Ski-Doo models? \u003cstrong\u003eA:\u003c\/strong\u003e They are specifically designed for the MXZ 670 HO and Summit X 670 HO; other models may require different bore sizes or piston configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do the kits come with everything needed for installation? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, each kit includes pistons, rings, wrist pins, and circlips, though you should also plan to replace gaskets and seals separately.\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":44949849112662,"sku":"SZ1F15915","price":340.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_effe719a-df42-46f0-af1b-797993f329ae.jpg?v=1781400915","url":"https:\/\/www.solidspare.com\/products\/2-spi-040-over-bore-piston-kits-fits-ski-doo-mxz-670-ho-summit-x-670-ho-79mm","provider":"Solid Spare","version":"1.0","type":"link"}