I've been thinking about buying a bike, and I found this very nice looking Ninja 250.

It's been very well-maintained, and the current owner has explained everything thoroughly, with all the paperwork to back it up.

One thing that concerns me is the mileage. According to the odometer, this bike's been ridden for over 30,000km (in miles, that's just a little bit under 19,000). Is that normal, or is it too much?

How many kms/miles does a Ninja typically last, anyway?