complained a few days after buying bike about vibration. informed normal.. front tire cupped last fall. replaced both with orig factory bridgestone 701/702 tires Feb 2013. bike vibrates terrible. rear rim adjusted to .4mmRadial/.8mm lateral. Still vibrates badly. Told reason: beast of engine and is normal. It´s not comfortable. Bought from dealer. Differrent dealer said probable cause is the tires are not cruiser tires. Sidewalls are hard which is more likey the problem. Any suggestions? Warranty runs out Apr11, 2013.