Originally Posted by davel1971
mine has a sticker on bumper behind spare tire that states not to mount anything to bumper or will void frame warranty
Yep there are bumpers and there are bumpers (and frames) some are designed to carry weight and come with or have optional racks and some don't. As said here, keep within the rating of your specific bumper or rack AND you will be okay.
My 5er is SO heavy on the front (25%) by the time I get it loaded, it is helpful to have something on the rear behind the axles to keep the pin weight reasonable. Others can put nothing on the back and their bumpers and rear froames are not made to carry ANY weight.