Hi, have you checked fitment of sliding brake plate stop? I had a problem with this as brake plate would chatter as I applied rear brake ,Also as this is a recent rebuild I would also suggest running bike for a while to let everything settle into place,I reckon at least 1500 miles on a rebuild on any bike to sort out problems/settings before they feel right & reliable, All comes down to regular riding & servicing I would travel anywhere on my A10 with no worrys!! long term ownership & many a mile will always inspire confidence. all the best Dave.