Got any pictures of your set-up?Are you running a shock or strut?Dirt or asphault.It could be a number of things.The most common problems are the bar is too short,too high,or just built too stiff.Ive been through all of these.You should make it adjustable if you can.It'll help on different track conditions.I like to being able to adjut it from 3'' off the ground to about 6''.
May be a little hard to see,but I like the single bar on top and two on bottom.It mounts with heims to the carrier,and to the mount I welded to the subframe.The whole thing was built with 3/4 X .058 seamless mild steel.I am going to build all new wheelie bars this winter with chromoly.The mild steel doesnt have memory like the moly.So the bar I have now is actually bowed a bit.I have had no other problems with it.