Re: difference in a 4 stroke and 2 stroke motor
Four stroke BICYCLE engines have a better rep for reliability due to the china two stroke being so poorly made.
In the world of quality engines, the piston port two stroke RULES dependability due to fewer moving parts to fail.
It's a judgement call but until china two strokes improve (it is slowly happening) the four strokes are slightly more dependable.
That being said, I have always preferred two strokes for simplicity and ease of repair.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.