The BETA PISTON (OEM 037.34.130.00.00) is the original Beta Front Fork component for the RR 350 4T X-PRO, RR 390 4T X-PRO, RR 430 4T X-PRO, RR 480 4T X-PRO (2026–2027). It keeps your Beta performing exactly as the factory intended. Replace it as part of normal maintenance or after wear. Choosing OEM keeps fit, performance and resale value ...