Today I decided to give my Tahoe some rest and went to work on a bike. It is a 50 miles ride with about 20 miles on small roads and 30 miles on I-93 (NH and MA). It was the first time I took her on a slab. At 70-75 mph I had a feeling that this speed was above the abilities of this bike: vibration, noise, I don't know how to describe it, but that was my feeling. Nothing like that while riding below 55-60... Is it common for all the 500s or something may be wrong with this particular bike? BTW, I weigh 200, and I was riding alone if that matters.