{"product_id":"namura-na-40000r-63-95mm-piston-rings-for-yamaha-namura-pistons","title":"Namura NA-40000R 63.95mm Piston Rings for Yamaha Namura Pistons","description":"\u003cp\u003eRestore proper compression and piston performance with Namura NA-40000R 63.95mm Piston Rings. Designed specifically for use with Namura pistons, this replacement ring set supports reliable sealing between the piston and cylinder wall, helping maintain combustion efficiency and consistent engine operation.\u003c\/p\u003e\u003cp\u003eThese piston rings are intended for compatible Yamaha applications using Namura pistons. Verify the piston size, engine model, and existing piston specifications before installation to ensure proper fitment. The 63.95mm size should match the corresponding Namura piston and cylinder assembly.\u003c\/p\u003e\u003cp\u003eManufactured for Namura, the NA-40000R is a direct replacement component for servicing compatible piston assemblies. Proper installation, ring orientation, cylinder preparation, and end-gap verification are essential for dependable results. Refer to the engine and piston manufacturer’s service instructions for installation procedures and fitment requirements.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 63.95mm piston ring set\u003c\/li\u003e\n\u003cli\u003eApplication: Designed for Yamaha applications with compatible Namura pistons\u003c\/li\u003e\n\u003cli\u003eBrand: Namura\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: NA-40000R\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 186-4000R\u003c\/li\u003e\n\u003cli\u003eFitment: For use with Namura pistons only; verify engine model and piston compatibility before installation\u003c\/li\u003e\n\u003cli\u003eFunction: Helps restore piston-to-cylinder sealing and engine compression\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67558472417515,"sku":"186-4000R","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/7863-5e94dd7d0957b.gif?v=1790762878","url":"https:\/\/ctracingservices.com\/products\/namura-na-40000r-63-95mm-piston-rings-for-yamaha-namura-pistons","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}