{"product_id":"namura-040-over-bore-piston-kit-for-yamaha-yfz50-fits-2017-2026-40mm","title":"Namura .040 Over Bore Piston Kit for Yamaha YFZ50 fits 2017-2026 40mm","description":"\u003ch2\u003e.040 Over Bore Piston Kit for Yamaha YFZ50\u003c\/h2\u003e\u003cp\u003eThis .040 over bore piston kit for Yamaha YFZ50 includes a 40mm piston, rings, and wrist pin, designed to restore engine performance in 2017-2026 models.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis .040 over bore piston kit for Yamaha YFZ50 is a 40mm diameter piston assembly intended for use when cylinder wear requires oversizing. It fits Yamaha YFZ50 models from 2017 to 2026, providing a direct replacement that restores compression and power. The kit includes the piston, rings, and wrist pin for a complete installation.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOversized .040 inches (40mm) to accommodate worn cylinders\u003c\/li\u003e\n\u003cli\u003eIncludes piston, rings, and wrist pin\u003c\/li\u003e\n\u003cli\u003eManufactured from high-strength aluminum alloy\u003c\/li\u003e\n\u003cli\u003ePrecision-machined for accurate fit and minimal friction\u003c\/li\u003e\n\u003cli\u003eRings are designed for optimal sealing and oil control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha YFZ50 (2017-2026)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed during engine rebuilding when the cylinder requires overboring\u003c\/li\u003e\n\u003cli\u003eIdeal for restoring lost compression and power in high-hour YFZ50 ATVs\u003c\/li\u003e\n\u003cli\u003eSuitable for both recreational and competitive 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\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\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 Do I need to replace the cylinder when using this over bore piston? \u003cstrong\u003eA:\u003c\/strong\u003e The cylinder must be professionally bored to 40mm to match this piston; honing is also recommended for proper ring seating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this piston kit be used on other Yamaha models? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is designed specifically for Yamaha YFZ50 engines; it will not fit other models without modification.\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":44890440269910,"sku":"SZ1F11125","price":120.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_5a12ea39-f262-4927-823a-647f658f527d.jpg?v=1781139387","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-kit-for-yamaha-yfz50-fits-2017-2026-40mm","provider":"Solid Spare","version":"1.0","type":"link"}