Now... don't take offense when I say short.. as I'm short as well. I stand at 5'4 on the good days. Tremonte posted a good video with some insight and tips for the shorties like me. There's even a Z650 in the video as well Skip to 9:15 to see him get on the Z650, he's 5'3
Luckily, I'm tall enough to balance on both feet if needed. But the Z650's narrower seat does help shorter rider to comfortably and safely sit on the bike in traffic. His method is what I have to do on taller adventure bikes.