[technocat]

I just bought a GZ250 today and rode it home 7 miles. I am 6'1" and I found it to be comfortable. That being said, I believe someone with your height should do fine. I definitely believe you don't want to be over 6'6" just because the seat is so low and you'd end up with your legs at an odd angle. But I was rather surprised when I sat on the bike and how comfortable it was compared to what I expected.

Bottom line is, you just have to try it. You may just be surprised how well it fits.