The reason for the big bore bikes is because it is ADV riding and not single track off road, Dual Sport, or Enduro style riding. ADV bikes need to be capable of hitting the tarmac for long miles but also be capable of riding dirt roads, jeep roads, and simple single track while carrying everything you need to travel for days, and for some hard cores, months. Dirt bikes like KTM 250, 300, and even 500 EXC bikes have difficulty doing the higher extended speeds with the lower maintenance needs of the big bores. Not to mention that they will buzz your brains out. I have a 500 EXC That is a great, no, make that excellent Dual Sport bike, but it will not do a 6 1/2 hour ride on the highway packed for a week to Maine. There is no do it all motorcycle, but for me, if I had to own only 1 motorcycle for both commuting and fun, my choice would be an Adventure Bike.
P.S. My KTM 500EXC will be at The Gap this year, though it will be dressed in it's Super Moto garb
