Most of the things you'll be looking at will be in the low 30s to high 40s, *maybe* low 50s if you pussy foot it. High mileage would be like a 250cc Ninja, I think they're in the 70s pretty easily, but with a feller your size, I really would NOT recommend something that small. Also keep in mind that standards, like my old Bandit ran happily on 87, any of the actual sport bikes have to have 91. Seriously, check out the SV-650 as at least part of your research if you're serious.
