Hmm, my A7 is much smoother than the A10, especially at high revs. But it IS vibrating obviously. You got two pistons, big ends and conrods oscillating, as opposed to only one in a single like the B40, so I wouldn't be surprised if it was vibrating more. But more than a 750 Bonnie with it's bigger pistons and high compression? I would indeed be worried about that!
Cheers, Markus