It looks like givi rack will only allow 6kgs load, despite monkey boxes being advertised as 10kgs.
they always say that to try to mitigate against any claim if the subframe breaks - the Hayabusa aluminium subframe and early versions of the R1150GS had problems.
Personally, I just ignore it and have not had a problem on the VFR750, TDM850, R1150GS and XT1200Z which all had Givi topboxes fitted during the last 2 decades.

