just because its bigger dont always mean better!
i know of his axles and they aren't any stronger than stock.
not saying he has bad product, just not any different from stock
first, check degree of axle
make sure its not in a bind from the start.
do you have a lift, if so make sure the shocks arent turned all the way up,also do you still have your sway bar still on because this could cause problems for this bike also
just a few things to check
if your still having these problems , feel free to give us a call and we would be glad to help with what we can