Is a 250cc Motorcycle too small?

[Roogarooga]

Hey there, I have never rode a motorcycle before but i really want to learn how to ride one. I was looking at a Ninja 250 because it seems to be not as powerful and cheap; i perfect starter bike =D But all of my friends tell me that a 250cc motorcycle is a bit small for someone 6' 245lb Do you think that bike would be fine for city and freeway riding or should i look for another? If so what would you recommend? Thanks =)