A Sportster puts out 60 HP (to the wheel), a Buell is pushing more then that. The Buell is not liked by HDC, they build them in hopes that kids will get off of a crotch rocket, and get on to a "real" bike. That explains why they are built like crap (you will gain HP just by rebuilding the engine to factory specs), and why the new bikes lack even more balls.
I ride (sorry, rode) my bike gently (relatively), I have only hit the rev limiter a few times, never topped out the bike, never done a wheelie, never done a burn out. I bout it with 6000 miles, I got 6 month worth of riding out of it (riding season never ends here IMO). I had a bike for 6 months, and I have to rebuild it? This is almost normal? Sad truth, it is. I know a guy who went through 3 engines in 20,000 miles, how do you explain that? He wasn't a 'hard' rider, but he doesn't ride slow either.
Buell has consistantly blamed the owners for thier engine failures. I refuse to go back to a company who blames me for thier POS bike breaking in 6 months.
HD's bikes have much higher quality control, but screw them. I will buy a Honda next (looing at the ST1300 right now). I want something I can ride, and not worry about what peices are going to fall of while going down the road. And if something goes wrong, I won't have to worry about Buell saying "Well, don't ride it like a sport bike".