I was thinking you were a pretty good typist for being 1. Check out this topic:
http://www.kawasakimotorcycle.org/forum/viewtopic.php?t=905. But keep in mind that we don't condone speeding at this forum.
If you want to know if the 250R has balls, the answer is that it doesn't have as much as the 500, but it has more than you. It can get up and talk if you know how to ask it. There are very, very few riders that are limited by their bikes. Just about any bike is engineered to be a quite capable machine. The reason the bikes don't do more is because most riders (myself included) don't have the skill to really use what the bike can give. That takes years of practice and formal training. Note that I said, "and."
And as for top speed, it's 70mph. It's the same as a 500R, and the same as a 636, and the same as a 1200. That's the fastest anything can go in Minnesota, and my 250 handles it easily. I have very rarely done more than that, and the bike still has plenty of power. So what's the purpose of a bigger engine?
Is it to beat cars when the light turns green? My 250 can do that. My car is a Lexus LS400, and it can beat most cars on the road, but my 250 can beat the Lexus without even breaking a sweat.
Now if peer pressure is a problem for you, just get yourself a couple of stickers that say 600, and slap one on each side. The bike could pass for a 600 unless you're talking to someone who really knows his stuff. And if someone has to ask you the engine size when they're standing right beside the bike, it's because they don't know their stuff. It happens to me all the time.
Curt