Like Pigr said take it easy till the 500 when they put the synthetic in. then my modo is break it in like you are going to drive it. I've seen two twin bikes (mom's, step dads) broke in at the same time. Mom did the nice and easy like the book said. After 100 miles step dad rode his like he stole it.
After about 6 months two of there friends lined them up to race them and step dads smoked moms. So i believe after the 500 oil change ride hard as you want and don't look back, because you wont see anyone enyways.
The day I bought mine in July 2005 I drove up the pike at 125 m.p.h. and I did the same several dozen times since then. I just had the 500 mile service done yesterday at 4,500 miles. The service lady seemed unimpressed that I waited so long. I complained of a buzzing noise coming from my engine. Turns out the bolt that holds the front of the gas tank down was missing.
The only sign of trouble is that my tires are down "to the wear bar" on front and rear. They still appear to have plenty of tread in my opinion. At this point I consider it to be "broken in" and trouble free.
I did not see any wear bars, however, I think they were trying to reach the wear bars of my wallet. I was also contemplating front tire wear, 4500 miles hmmm, too many front wheel burnouts? Stoppies?
I don't know, the tires look fine to me.