I understand that the thermostat straps the initial water volume so the block can heat UP to the proper temperature (which some people complain about [the water dribbling and not pissing fully] and some people mistake for a broken thermostat when they dont see the tell tale peeing hard enough).
I did some reading. And the census is that in the older 2-strokes it can 'be ok to do in tropical climates'. But 'the manufacturer put it there for a reason' so I'll stick with it.
Seems a cooler running engine can build up carbon faster and foul- but the older 2-stroke are rich engines to begin with so that's kinda moot there too. The block can also not heat up properly causing uneven piston wear, but the tolerances in a 2-stroke are also loose- so again - not a huge factor.