for a 250cc engine they are super quick, of course they are geared low for a quick acceleration, riding one you have to do a lot more of shifting gears, they are light as a feather, perfectly balanced and react quickly to the riders movements, they are despicable to high wind blasts such as passing a semi truck.
The bike is a marvel of engineering excellence how it gets so much performance from a small engine, the 500 Ninja isn't much faster, just more torque, lower end power.
The 250 Ninja has a top speed of 105 with a 1/4 mile time of 12.92, not even a full size Harley can match those numbers