Over 15,000 miles on mine, and she runs like a top. Really, with modern sportbikes, you'll get as many miles out of it as you want, so long as you maintain it properly (oil changes, spark plugs when needed, etc). It's not at all uncommon to find bikes with well over 30,000 miles running like new, because they were maintained well.
'04 Blue ("Sara")
"The object of war is not to die for your country. It's to make the other poor bastard die for his." -- Gen. George S. Patton
If you maintain it properly I can easily see 100k. Look at all the touring and sport/touring bikes. They start running right at 30k. Like some said before, it's hard to say because everyone who has one total's it before the bike gives up on them.
I've read somewhere that the average life expectancy of a modern day sport bike is around 15,000 miles due to crashing.
However, if you can avoid a write-off, I don't see why you can't exceed 100,000 miles without a problem.
Memory can change the shape of a room; it can change the color of a car. And memories can be distorted. They're just an interpretation, they're not a record, and they're irrelevant if you have the facts.
Faith is being sure of what we hope for and certain of what we do not see.