I've been searching for a mid-sized crusier and a few days ago I test drove a 2006 900 classic. It was very smooth up to 75, as fast I got. The same day I found a new 2010 classic at a dealer marked way down to clear stock. I figured may as well get a new one with warranty. It had never been gassed up. I bought it. However, this one is not smooth like the older one. Above 60 mph it really starts to vibrate, not smooth, rough. I've had a technician look at it and he said it's just the way these bike run. So, what's up with this? Now, the 2006 had 5500 miles on it. My new one has 300. Has anyone had any experience with these bikes getting better with age? I also see that being a V-Twin it has an engine counter balance. Could it be that some engines are just more balanced than others? I checked with the owner of the 2006 and he had not made any modifications except for new pipes. I know this topic has been covered more than once. I'm trying to figure out if it is the case that "not all 900 vulcan classics are created equal", or if there is anything I can do to make this bike pur like the 2006 I test drove.