No, stock cables and routing will work fine. The euro bars, if anything, are lower than the bucks and the controls are closer to the front of the bike without that extreme pullback found on the bucks. If you end up needing to reroute anything it's a trivial job. Since the difference isn't massive often this just means tweaking the routing at or near the triple tree/forks.
If you do change the routing the most important thing is to test the bike before riding it. Move the bars from full lock left to full lock right and make sure nothing is tugging on the cables. Do this while the bike is running/idling but NOT moving. This way you can HEAR if the throttle cable is being tugged on. If routed poorly the cables could prevent you from turning or your cables could get engaged accidentally by being pull/stretched against the motorcycle body if they are too tight/kinked; this could lead to unintentional braking/acceleration/clutching.