{"product_id":"namura-na-40002r-65-94-mm-piston-rings-for-yamaha-namura-pistons","title":"Namura NA-40002R 65.94 mm Piston Rings for Yamaha Namura Pistons","description":"\u003cp\u003eRestore proper piston performance with Namura NA-40002R piston rings, designed for use with compatible 65.94 mm Namura pistons in select Yamaha applications. These replacement rings help maintain compression, support efficient combustion, and control oil within the cylinder for dependable engine operation.\u003c\/p\u003e\u003cp\u003eManufactured by Namura and identified by manufacturer part number NA-40002R, this ring set is intended specifically for Namura pistons rather than universal installation. Confirm the piston size, engine model, and application before ordering to ensure correct fitment. The vendor part number is 186-4002R.\u003c\/p\u003e\u003cp\u003eNamura piston rings are a practical choice for engine rebuilding, top-end service, and replacement of worn or damaged rings. Proper installation and measurement are essential for achieving the required ring end gap and piston-to-cylinder compatibility. Follow the engine manufacturer’s service specifications during assembly.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 65.94 mm piston ring set\u003c\/li\u003e\n\u003cli\u003eFitment: Designed for compatible Yamaha applications using Namura pistons\u003c\/li\u003e\n\u003cli\u003eBrand: Namura\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: NA-40002R\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 186-4002R\u003c\/li\u003e\n\u003cli\u003eApplication: Replacement piston rings for engine rebuilding and top-end service\u003c\/li\u003e\n\u003cli\u003eCompatibility: For Namura pistons only; verify model and piston specifications before installation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67558451216619,"sku":"186-4002R","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/5a8b-5e94cdb26fff3.gif?v=1790762756","url":"https:\/\/ctracingservices.com\/products\/namura-na-40002r-65-94-mm-piston-rings-for-yamaha-namura-pistons","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}