Hi Brett,
I stand by what I say, a 4 strokes power impulse is stronger due to the time is has extract energy, the ability to use higher compressions that convert more of the fuel into heat, less resistance not having a primary compression to deal with and least of all the calorific value fuel is higher not having to deal with oil. (And probably lighter pistons as their shorten length does not have to act as valves against the windows of ports.)
Evidence of this the fact that if one engine has half the net power impulses as the other then it should make half the power but it doesn't work out that way.
And I too follow motorcycle practice having ridden for about 50 years and my current bus is a Moto Guzzi - but none of this matters here.
So why chose a four stroke?
From a purists point of view, the mechanics of operation are far more tangible although using slightly more parts vs the extreme complications of two stroke physics and interdependency of their parts.
And (since both systems are heat exchange air pumps, the inherent use of supercharging in a two stroke will always give it the edge) the fact that the 4 stroke simply uses atmospheric pressure throughout its entire intake system.
The four stroke concept is easier to understand.
I realise that most will rail against a simple non piped two stroke as being labelled as supercharged but they all are.
The primary volume must be mechanically compressed in order for the charge to scavenge and its usually about 1.6:1 compression ratio in a model engine.
The entire history of two strokes is littered with how to better compress the primary and secondary volumes and give added charge to the fuel load.
Split singles, DKW Bekamo (
http://www.odd-bike.com/2014/02/dkw-supercharged-two-strokes-force-fed.html) pump engines and resonant pipes are all charging systems allowed in racing circles but when someone mentions mechanically charging for a four stroke above atmospheric it deemed as cheating and unfair - go figure!
Anyway, I could easily rave about this subject forever so I will leave it there, Cheers.
P.S. If you want to cite examples where you can use all the power you can get then look at Top Fuel Drag car engines, dominated by supercharged four strokes.
Lifted unashamedly straight from Wikipedia " The calculated power output of these engines is most likely somewhere between 6,340 and 7,460 kW (8,500 and 10,000 hp),[8] which is about twice as powerful as the engines installed on some modern diesel locomotives, with a torque output of approximately 10,000 newton metres (7,400 lbf·ft)[9] and a brake mean effective pressure of 8.0–10.0 MPa (1,160–1,450 psi).
In late 2015, tests using sensors developed by AVL Racing showed peak power of over 11,000 hp (8,200 kW).[10]"
Can't think of a two stroke anywhere near this in horsepower per litre and the power is increasing all the time and having to be ruled against for safety reasons.