{"product_id":"spi-020-over-bore-piston-kit-for-yamaha-excel-v-540-xlv-540-1979-1990-73-5mm","title":"SPI .020 Over Bore Piston Kit for Yamaha Excel V 540 \u0026 XLV 540 1979-1990 73.5mm","description":"\u003ch2\u003eSPI .020 Over Bore Piston Kit for Yamaha\u003c\/h2\u003e\u003cp\u003eThis .020 over bore piston kit is designed for Yamaha Excel V 540 and XLV 540 snowmobile engines manufactured from 1979 through 1990, providing a fresh bore surface for worn cylinders.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe SPI .020 over bore piston kit is a direct replacement for Yamaha Excel V 540 and XLV 540 models requiring a 73.5mm bore after a .020 overbore. It includes the piston, rings, and wrist pin for a complete top-end rebuild. This kit is intended for snowmobile owners restoring the performance of 1979-1990 Yamaha two-stroke engines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCast from durable aluminum alloy with reinforced skirt for strength\u003c\/li\u003e\n\u003cli\u003ePrecision-ground rings provide consistent compression and oil control\u003c\/li\u003e\n\u003cli\u003e.020 over bore size allows restoring cylinder roundness\u003c\/li\u003e\n\u003cli\u003eIncludes new wrist pin and circlips for secure installation\u003c\/li\u003e\n\u003cli\u003eDesigned to match OEM specifications for reliable fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha Excel V 540 1979-1990\u003c\/li\u003e\n\u003cli\u003efor Yamaha XLV 540 1979-1990\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSnowmobile trail riding and backcountry exploration\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds after top-end failure or compression loss\u003c\/li\u003e\n\u003cli\u003eRestoration of vintage Yamaha snowmobile performance\u003c\/li\u003e\n\u003cli\u003eSeasonal maintenance for competitive or recreational use\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 Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e73.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020 over\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, circlips\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 or bore the cylinder to use this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the cylinder must be bored to 73.5mm to match this .020 over piston – it will not fit a standard 73.0mm bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this piston be used in other Yamaha 540 engines? \u003cstrong\u003eA:\u003c\/strong\u003e It is designed specifically for Excel V 540 and XLV 540 models; always confirm compatibility with your engine's specifications before installing.\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":44890489487446,"sku":"SZ1F11831","price":136.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_acd58a44-09de-42f2-bc68-bf23699cdf3c.jpg?v=1781140574","url":"https:\/\/www.solidspare.com\/products\/spi-020-over-bore-piston-kit-for-yamaha-excel-v-540-xlv-540-1979-1990-73-5mm","provider":"Solid Spare","version":"1.0","type":"link"}