Here's something some people with a little bit of knowledge that may find to be interesting...
I have two sets of handle bars, one is a low set of pro tapers, the other set are Flexx Bars with two risers, probably weigh 3lbs more than the other set. However, my bike hooks much harder with the Flexx bars and stays on the wheelie bar far better.
Precision Powersports figured out why that happens awhile back, if nobody noticed by the look of their bikes...