Well - I know for a fact it depends on what tyre is fitted!. - Also whether you have overlength rear shocks and how the forks sit.
Saggy ORIGINAL ISSUE forks/shocks plus Darkside pumped up to 36psi and you can get an R3 to bounce on and off the kickstand. - will even roll away on its own on tickover if you do things just right.
But even on round tyres and the shocks longer so the bike is pushed over onto it - I'll bet it's not a lot.
I guess 30kg or less as it is way too easy to pull/push it forward to roll off the side stand in my experience. Would also depend on the thickness/height of the scale plate you used as you may have reduced the lean angle and hence the weight bearing down on it.
Assuming a wet weight of 366 kg, your 31.95 kg would be about 9% motor weight on the kick.
Would be interesting to know the lean angle provided by resting on the kick, height and angle of the down kick and fool with some trig . . .