I'm gonna guess I had ~400 hours on mine before I did my work. And I am going to say that is being conservative. I didn't have an hour meter on it, but I do now. Since last May, I have 96 hours on it. So, to use that as an average, we will say 100 hours/yr. It's an '07. I probably rode it more at the beginning as there were a couple of years I did some 29 Palms to Lake Havasu rides. 210 miles each way. Did that 2 years in a row. But we will conservatively stay with the 100 hours/yr. Mid 2008-mid 2013 is 5 years = 500 hours. But, I was injured and off the bike for a year, so say 400 hours. Still, I think this is kind of conservative.
It will be interesting now that I have an hour meter. I don't race, but I certainly don't baby the bike. It is dual sported but I don't put too many street or fire road miles on it. You have to do what you have to do in some of the organized dual sport rides.