Hey.
I think i know your problem.
My sportmaxx rarely did wheelies in the winter BECAUSE, The asphalt is always wet and icy. Today our asphalt dried up Completely, and just from wheelies, i ruined by body mount nubs.
wheelies are cool for about 10 seconds, and then they suck.
The only thing i am doing with wheelies is trying to keep the front end in the air and not flip over.
Also It may b e that you have not tuned the needles snce break in. check your manual for safe but preforrmance inhancing tuning suggestions.
Alos skymaxx, i agree w/ you completely.
You might be able to tune it for wheelies, but then you will lose control from the acceleration, and probably not get good top end because it is so lean. and for racing, WHEELIES BLOW.
Good luck!!