Met this couple in the Yukon at Carmacks. We were on the way to Alaska as they were but, they were on a much longer trip.
They had shipped the bikes from England to eastern Canada , ridden across and were going to Alaska then down through the U.S. , Mexico, Central America and to the southern tip of S.America.
He was a school teacher and very meticulous with prep and maintainance of the bikes. I followed their progress on H.U. and they did complete the trip.
I've not ridden the TTR 600 but, I rented an XT 600 for a few days in Costa Rica. I like the simplicity of a carburated -air cooled motor and am one of those that would like a kicker to back up the button. Like my ATK 605.