Ian, thanks for the question. There is no visable vibration. In fact theres no movement while trying to wiggle it with your hand. The plate itself is 1/8" thick steel and is very rigid. Perhaps if it was vibrating like harley it'd be a different story..haha
And as far as the brackets holding up... I orginally did this modification in 2007 12,000 miles ago. I have cut front and rear springs on the hardest setting, and ride on some very turbulent roads. Ive never had a problem, especially at the bend point. Ive actually never even had a fender bolt come slightly loose either.
