Hi ...I have a 1934 Standard Scout. It has a top bracket mount, securing both heads to the frame tube above. Comparative with and without, and well, quite convincingly, the top mount eliminates much vibration, creating a more smoother experience. Mind you, the standard scout '45c.i. here, is configured in a Chief Frame, so I am unable to say, exactly, what your experience will be, in a Scout Frame, but, predictably, much better I presume.