{"product_id":"athena-102mm-big-bore-cylinder-kit-for-yamaha-yz450f-and-yz450fx-p400485100068","title":"Athena 102mm Big Bore Cylinder Kit for Yamaha YZ450F and YZ450FX, P400485100068","description":"\u003cp\u003eUpgrade the top-end performance of your Yamaha with the Athena P400485100068 Cylinder Kit. Designed with a 102mm big-bore cylinder and a 12.3:1 compression ratio, this kit is engineered to support improved engine output and dependable performance for motocross and off-road applications. Athena is recognized for precision-engineered engine components manufactured to meet demanding powersports requirements.\u003c\/p\u003e\u003cp\u003eThis cylinder kit is designed for direct fitment on 2018–2019 Yamaha YZ450F and 2018–2019 Yamaha YZ450FX models. The kit configuration supports a straightforward replacement or performance rebuild when paired with compatible components and proper installation procedures. Verify model-year compatibility and follow the manufacturer’s service specifications before installation.\u003c\/p\u003e\u003cp\u003eFeaturing a 102mm bore, the Athena kit provides an increased displacement option over the original cylinder configuration while maintaining a practical fit for the specified Yamaha engines. Its 12.3:1 compression ratio is intended for riders seeking responsive power delivery and strong engine performance. Install using appropriate tools, gaskets, fasteners, and torque specifications as required by the application.\u003c\/p\u003e\u003cp\u003eThe manufacturer part number is P400485100068, and the vendor part number is also P400485100068. Select this Athena cylinder kit for a precision-focused solution for rebuilding or enhancing the top end of compatible Yamaha YZ450F and YZ450FX motorcycles.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Athena\u003c\/li\u003e\n\u003cli\u003eManufacturer: Athena\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: P400485100068\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: P400485100068\u003c\/li\u003e\n\u003cli\u003eCylinder Bore: 102mm big bore design\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 12.3:1\u003c\/li\u003e\n\u003cli\u003eApplication: Engine cylinder kit for performance replacement or rebuild\u003c\/li\u003e\n\u003cli\u003eFitment: 2018–2019 Yamaha YZ450F\u003c\/li\u003e\n\u003cli\u003eFitment: 2018–2019 Yamaha YZ450FX\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2018 Yamaha YZ450F\u003cbr\u003e\n2018 Yamaha YZ450FX\u003cbr\u003e\n2019 Yamaha YZ450F\u003cbr\u003e\n2019 Yamaha YZ450FX","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":67549840146667,"sku":"68-4996","price":1134.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/1050-5ec2d79fdc5e6.jpg?v=1790696304","url":"https:\/\/ctracingservices.com\/products\/athena-102mm-big-bore-cylinder-kit-for-yamaha-yz450f-and-yz450fx-p400485100068","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}