My G5 Deluxe came with similar bar end weights with napoleon/stadium bar end mirrors bolted to them. I left them on the "Factory Wrist Torture Bars" when I sold them, after replacing them with Superbike brand Low Euro Bars. I have ridden British & Italian Singles for about 50 years, & never had any of the problems described in the Bar End Vibranator Weight Ad. Aside from thinking they are "snake Oil", I believe Our UCE Enfields all have a Counter Vibration Dampener built into the Crank/Flywheel Assembly. So they actually do not Vibrate anything like their ancestors.
IMHO/e it is the hands down #1 smoothest running of all non counter vibe weighted big bore factory singles out there.