There are two problems that may come up when having the beads installed.
1. If the dealer puts in the wrong amount of beads for your preferred tire. (resovlved by checking on their balancer).
2. Some dealers when installing the tire on your rim will 'lube' up the rim in order to assist with the tire mounting process. If they put on too much lubricant and it seeps into the inside of the tire then the beads can get stuck in the lube. Thus making the tire off balance.
I've had beads put on my Kawasaki ZX12R front tire and didn't notice ANY issues with the ride. And I can assure you I was up over 200kmph without any further concerns. Best bang for your buck in my humble opinion.
Safe travels.
Paul