{"product_id":"namura-standard-bore-top-end-repair-kit-size-b-for-yamaha-yz450fx-2021-2023-97mm","title":"Namura Standard Bore Top End Repair Kit Size B for Yamaha YZ450FX 2021-2023 97mm","description":"\u003ch2\u003eStandard Bore Top End Repair Kit Size B for Yamaha YZ450FX 2021-2023\u003c\/h2\u003e\u003cp\u003eThe Standard Bore Top End Repair Kit Size B provides a complete set of piston, rings, and gaskets to restore compression and performance in 2021-2023 Yamaha YZ450FX engines, featuring a 97mm bore.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis top end repair kit is engineered for Yamaha YZ450FX models from 2021 to 2023, providing a precise 97mm bore and Size B piston for a reliable overhaul. The kit includes a piston, rings, wrist pin, circlips, and all necessary gaskets to complete the job. Whether rebuilding after hours of cross-country racing or performing preventative maintenance, this top end repair kit ensures the engine runs like new.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e97mm bore piston designed for standard cylinder dimensions\u003c\/li\u003e\n\u003cli\u003eSize B piston provides proper clearance for stock Yamaha YZ450FX cylinders\u003c\/li\u003e\n\u003cli\u003eComplete gasket set included for a hassle-free installation\u003c\/li\u003e\n\u003cli\u003eHeat-treated wrist pin and circlips ensure secure assembly\u003c\/li\u003e\n\u003cli\u003eMatching rings pre-gapped for quick installation\u003c\/li\u003e\n\u003cli\u003eAll components are precision-machined to Namura's quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ450FX 2021\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2022\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2023\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCross-country and GNCC racing requiring reliable top end performance\u003c\/li\u003e\n\u003cli\u003eEnduro and trail riding where engine longevity is critical\u003c\/li\u003e\n\u003cli\u003eComplete engine rebuild during off-season maintenance\u003c\/li\u003e\n\u003cli\u003eHigh-performance riding on tight, technical terrain\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\u003e97mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSize B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Wrist Pin, Circlips, Gaskets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha YZ450FX (2021-2023)\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 Does this kit include a new cylinder or only piston and gaskets? \u003cstrong\u003eA:\u003c\/strong\u003e This kit includes piston, rings, wrist pin, circlips, and a full gasket set; it does not include a new cylinder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the piston pre-installed on the rod? \u003cstrong\u003eA:\u003c\/strong\u003e No, the piston comes separately and must be assembled with the wrist pin and circlips during installation.\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":44949899935830,"sku":"SZ1F16107","price":373.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_5d476257-d1e7-42b5-ac5d-51822db4d62a.jpg?v=1781401175","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-top-end-repair-kit-size-b-for-yamaha-yz450fx-2021-2023-97mm","provider":"Solid Spare","version":"1.0","type":"link"}