Join Date: Jul 2005
Location: So. Dak. Sioux Falls
Thanked 2,976 Times in 2,177 Posts
I have run HD bars on three different bikes.
That indent is not "necessary". It's kind of a convienence for cables coming out of the switch boxes, but is not critical to the install.
Actually our switchboxes fit better without indents on the bars.
If you are using stock cables and stock wires, go with "non drilled" "non dimpled" bars.
I get mine from Flanders and am very happy with them.