Re: best low end power
Four strokes have much more low speed torque and less hp (as mentioned above) but for trail riding a geared down 2 stroke would be lighter.
The engine in your link lacks a carb and would need a battery and wiring plus exhaust system. Suitable for an experienced fabricator/ mechanic.
By the way- there is no way a 2 stroke will last as long without re-building, as a 4 stroke will last.
The power strokes are double and the heat created is doubled.
One plus with the smoker is they are very easy to re-fresh.