I've been riding street bikes for 30 years.
In that time I've had to take a street bike down a dirt road many times.
Having only had my 1st Busa for a couple months, I recall the first dirt road I took on it and saying "holy cow!". The Busa really doesn't like dirt roads imho compared with even other street bikes.
I have no idea why that is, I only have a lasting impression from the few dirt roads I've been on with it. I used to avoid dirt roads on my street bikes, now i will actually seek out another route if at all possible.
Sean