[RedDevil]

Yup.
When the revs go up beyond 4000 it is not misbehaving; the poor little thing is pulling its weight.

The engine can produce say 66 kW (on mine). It could theoretically climb 5 meters per second by that, if no power gets wasted to other things like air resistance and such.
On a hot day on the highway, thin mountain air, heavily loaded maybe 2 meter per second rise capacity remains. That is like a 7% incline at highway speed.
The climb rate is indifferent of speed (except for air resistance). At city speed you will still be able to climb at least 2 meter per second, a 15% incline. At jogging speed you could go straight up, if your tires are grippy enough. The CVT won' t budge.
You could climb Mount Everest in little over an hour at that rate. Honk when you reach the top