I'm amazed at how quiet and smooth this engine is! Vibration is amazingly light, it's very responsive and powerful. It shifts as slick as a Honda, Handling is superb, this is a very flickable bike! No problems or niggles at all with it, In my personal experience with bikes, this is the finest 500cc single I've ever thrown a leg over, and I've ridden several variety's of them. RE got it right with this one. I removed the rubber blocks from the fins and couldn't hear anything different, so out they stay and it looks much better. My riding Buddy's have nicknamed it the "Ol' Poop" surely some of you will remember the ol poop from cycletoons magazine back in the day. If you do remember you'll know why the name will stick with it. The UCE Rocks!