{"product_id":"mgt1-pwb-53710-1129320003","title":"Beta RR 390 4 T Race [2025-2026] - Piston Kit","description":"\u003ch2\u003ePROX piston kit for Beta RR 390 4 T Race\u003c\/h2\u003e\u003cp\u003eThe PROX piston kit is designed as a coordinated piston solution for the Beta RR 390 4 T Race from the years 2025-2026. The forged aluminum piston combines the piston replacement components included in the kit into a common assembly.\u003c\/p\u003e\u003ch3\u003eFunction and execution\u003c\/h3\u003e\u003cp\u003eThe standard piston compression design supports a clear selection based on the specified engine data. The “Flat with hollow” specification describes the specific design of the piston. With the compression ratio of 12.5:1 and the marking “4T”, the component is clearly classified for the specified four-stroke application.\u003c\/p\u003e\u003ch3\u003eTechnical data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: PROX\u003c\/li\u003e\n\u003cli\u003eMaterial: aluminum\u003c\/li\u003e\n\u003cli\u003ePiston Type: Forged\u003c\/li\u003e\n\u003cli\u003ePiston compression: standard\u003c\/li\u003e\n\u003cli\u003eDiameter Ø: 87,980 mm\u003c\/li\u003e\n\u003cli\u003eLetter oversize: C\u003c\/li\u003e\n\u003cli\u003eOversize: +0.02\u003c\/li\u003e\n\u003cli\u003eCompression ratio: 12.5:1\u003c\/li\u003e\n\u003cli\u003eStroke: 4T\u003c\/li\u003e\n\u003cli\u003eSpecificity: Flat with hollow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle assignment\u003c\/h3\u003e\u003cp\u003eThe PROX piston kit fits the Beta RR 390 4 T Race, built between 2025 and 2026.\u003c\/p\u003e\u003ch3\u003eScope of delivery\u003c\/h3\u003e\u003cp\u003eThe kit contains the piston, piston rings, piston pin and circlips. The individual parts included are therefore combined for the intended piston assembly.\u003c\/p\u003e","brand":"PWB","offers":[{"title":"Default Title","offer_id":57270719250758,"sku":"MGT1-PWB-53710-1129320003","price":246.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/4616\/8646\/files\/1129320003-1_0d650c22-29b1-431b-ad3d-6bb1acceaf64.jpg?v=1788597412","url":"https:\/\/motorize-ireland.com\/products\/beta-rr-390-4-t-race-2025-2026-piston-kit-5","provider":"Motorize","version":"1.0","type":"link"}