Engine Vibration

[flynrider]

I was playing with the vibes today while going down the highway. I noticed that the bar vibes that I feel at highway speeds in 5th (~4,250 rpm) virtually disappear if I downshift and get the rpm above 5,000). I went back and forth numerous times between 4th and 5th at around 80 mph and it's really noticeable if you're paying attention to it.

I suspect this may be a reason why I often forget to shift into 5th at highway speed.