That middle pic looking over the tank,,,it is hard to see how steep and high the climb is,,,but the all wheel drive didn't slip hardly at all. I like climbing it on the KX500 too,,,about three years ago,,, as I was going up on the K5,,, a Mountain Goat ran in front of me,,,I had to go around it,,,they don't see well,,,don't know how they don't fall off the rocks.
This hard climbing reminds me of how nice the K5 power is,,,but the EFI on the KX450F is the bomb moving from about 6500 to 10,500 elevation not a sputter, choke, or cough.