I am looking to get back into riding and considering a 4stroke. I have ridden a few of the newer 2strokes and they seem to have more engine vibration than I remember on any of my bikes. It's enough that is kind of bothers me. The cr's really numb my arms after a while. It's tough getting old.. How much vibration do the 450s transmit to the bars and the peg's compared to a smoker? Also I like the lightness/flickability of the 2strokes. The 450 felt kind of heavy sitting on it. Do you notice it on the track? The yamaha 450 is the only 4stroke I am considering because I just don't have the time or money to be wrenching on these things that much.