BETA RECTIFIER is the genuine Beta OEM ignition/charging component (part no. 037.40.054.00.00) for the RR 350 4T, RR 350 4T RACING, RR 390 4T, RR 390 4T RACING, RR 430 4T, RR 430 4T RACING and 2 more models (2020–2021). It keeps spark and charging reliable. Replace when you have weak spark or charging faults. Genuine OEM means exact fit, c
