I'm a new rider (late in life). Got a 2009 Boulevard C50. Saw some videos on drilling holes in the rear plate in the exhausts to give it some more throat to the sound. Before I do this, however, my shade tree auto background tells me that this will change the back pressure. Do I need to make any adjustments to the motor or am I good as is? My bike has a Linhan conversion on it as a trike and it could use a little more sound to match the look.