I am really glad this thread bubbled back up to the top: I am sure I looked silly the first time I tried to throw a leg over my RX3 with the box on back the same way I did my Ninja......it didn't work, my foot hit the box, I almost lost my balance, reminded my of getting kicks blocked in Karate back in the day :-). I was left wondering what the best practice was for the RX3.
I did get a center stand put on the bike, so now I just grab the handlebars, put my left leg on the left foot peg, and sort of sissor/fold my right leg over the bike. Getting off I always scruff the pad on the back of the box for the comfort of the mythical 2-up passenger after I put down the side stand, but I have managed mounts and dismounts without testing the crash bars (thus far, knock on wood
.
Happy riding (and mounting/dismounting)!