With the power you have I would try a 28" drag three or call Todd at hydromotive for his help. The quad 4 OT from Hydromotive always works well on the XB03's.
I have a 28" Drag 3 on my XB2002 with 225 Promax --- with raised limiter. Runs 99 to 100 GPS. Or plan "B" , send a used chopper to...