{"product_id":"spi-040-over-bore-piston-kit-for-ski-doo-mxz-670-ho-summit-x-670-ho-79mm","title":"SPI .040 Over Bore Piston Kit for Ski-Doo MXZ 670 HO \u0026 Summit X 670 HO 79mm","description":"\u003ch2\u003eSPI .040 Over Bore Piston Kit for Ski-Doo MXZ 670 HO \u0026amp; Summit X 670 HO\u003c\/h2\u003e\u003cp\u003eThis aftermarket piston kit provides a .040 over bore for Ski-Doo MXZ 670 HO and Summit X 670 HO snowmobiles, featuring a 79mm piston.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis SPI .040 over bore piston kit is built to refresh engine performance in Ski-Doo MXZ 670 HO and Summit X 670 HO models. It uses a 79mm bore to restore compression and power. Perfect for rebuilding high-output snowmobile engines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDurable aluminum alloy construction withstands high RPM\u003c\/li\u003e\n\u003cli\u003ePrecision-machined 79mm bore for exact fit\u003c\/li\u003e\n\u003cli\u003e.040 over sizing accommodates worn cylinders\u003c\/li\u003e\n\u003cli\u003eIncludes piston rings and wrist pin for complete installation\u003c\/li\u003e\n\u003cli\u003eEngineered for the 670 HO engine platform\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\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 in\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 Will this kit work on other Ski-Doo models with the 670 engine? \u003cstrong\u003eA:\u003c\/strong\u003e This piston kit is specifically designed for the MXZ 670 HO and Summit X 670 HO; other 670 models may have different bore specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is a cylinder hone necessary when installing this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the cylinder should be honed to the correct finish for the new piston rings to ensure proper break-in and compression.\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":44890931855446,"sku":"SZ1F13596","price":175.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_a9df0beb-342f-413a-9205-44e1a339a3e8.jpg?v=1781144329","url":"https:\/\/www.solidspare.com\/products\/spi-040-over-bore-piston-kit-for-ski-doo-mxz-670-ho-summit-x-670-ho-79mm","provider":"Solid Spare","version":"1.0","type":"link"}