With that amount of weight you need more than one 2" receiver.
Add one or two more 2" receivers and you can boost the weight capacity of single receiver racks. Some assembly required. Find out what your rear frame will support.
There used to be a company that made these for the back of RV's.
2010 KTM 690 Enduro R
2006 KTM 950 Adventure S
2002 KTM 400/453 EXC