Originally Posted by BikePilot
Yeah pretty much all bikes made except big crusiers and a few higher end mx bikes use 7/8" bars. Pick out whatever you like, aluminum is lighter and stronger. Either shave the nub off or drill a hole in the new bar.
The nub does a good job of holding the switchgear and so on in place, so when you shave it off, you lose the locating feature. The controls slip around on the bar more easily. After shaving off the plastic nub, put a layer of electrical tape on the bar where the control housing clamps down on the bar. That way the controls grab the bar real firmly without having to tighten them excessively.