I finished side mounting the RotopaX fuel pack today. As I had suspected, the DRZ 's aluminum sub frame can't handle the offset weight without lots of sub frame twisting going on. I will not
be offering this as a mounting option.
Looks great, but it's a bad idea on the DRZ. It might work on a DR or KLR with their steel sub frames though.
Here is my mounting recommendation. Mounted this way, one of the bags that are designed to fit over a seat should work well.
With this type of bag over the fuel pack.