{"product_id":"66-4mm-cylinder-piston-top-end-rebuild-kit-for-yamaha-yz250-yz-250-1999-2025","title":"66.4mm Cylinder Piston Top End Rebuild Kit for Yamaha YZ250 YZ 250 1999-2025","description":"\u003ch2\u003e66.4mm Cylinder Piston Top End Rebuild Kit for Yamaha YZ250 (1999-2025)\u003c\/h2\u003e\u003cp\u003eRestore the power and performance of your dirt bike with this comprehensive 66.4mm cylinder piston top end rebuild kit. Specially designed as a high-quality aftermarket solution for Yamaha YZ250 models from 1999 through 2025, this kit includes the essential components required for a successful top-end overhaul. This is an aftermarket replacement part engineered to provide reliable service and durability under demanding riding conditions, offering a perfect fit for your YZ 250 engine.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined 66.4mm bore cylinder for optimal compression and power delivery.\u003c\/li\u003e\n\u003cli\u003eComplete kit includes piston, rings, wrist pin, circlips, and top-end gaskets.\u003c\/li\u003e\n\u003cli\u003eConstructed from high-grade aluminum and alloys to withstand extreme heat and friction.\u003c\/li\u003e\n\u003cli\u003eDesigned for a direct-fit installation to reduce downtime in the garage.\u003c\/li\u003e\n\u003cli\u003eCost-effective aftermarket alternative to expensive OEM components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Models\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha YZ250 (1999-2025)\u003c\/li\u003e\n\u003cli\u003eYamaha YZ250X (2016-2025)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBore Size: 66.4mm\u003c\/li\u003e\n\u003cli\u003ePart Type: Top End Rebuild Kit\u003c\/li\u003e\n\u003cli\u003eComponent Type: Aftermarket Replacement\u003c\/li\u003e\n\u003cli\u003eEngine Type: 2-Stroke\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs this an OEM part?\u003c\/strong\u003e No, this is a premium aftermarket part designed to meet or exceed the performance of the original equipment, but it is not manufactured by the original equipment manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm compatibility?\u003c\/strong\u003e To ensure this kit fits your bike, please verify that your model is a Yamaha YZ250 or YZ250X manufactured between 1999 and 2025. It is also recommended to verify your current cylinder bore size is the standard 66.4mm before ordering.\u003c\/p\u003e\u003chr\u003e\u003cem\u003eImportant: This is a premium aftermarket part and is not manufactured by the original equipment manufacturer (OEM). Brand names and model numbers are used for reference purposes only. Compatibility may vary depending on the machine's serial number. Please verify fitment before purchase.\u003c\/em\u003e","brand":"Northline Parts","offers":[{"title":"Default Title","offer_id":42821496242247,"sku":"ZZ2S00882","price":809.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/7123\/5399\/files\/12_bc9dc0bd-5be6-4c3e-b061-0d99539def5e.jpg?v=1779800085","url":"https:\/\/www.northlineparts.com\/products\/66-4mm-cylinder-piston-top-end-rebuild-kit-for-yamaha-yz250-yz-250-1999-2025","provider":"Northline Parts","version":"1.0","type":"link"}