Sprae,
I have a 44T (because it came on the bike) and installed a 4 stroke.... works just fine.... If i had my choice... I’d go larger... I have a few hills to climb, and 35MPH on a bicycle is kind of ridiculous (and awesome at the same time).... I’d be glad to sacrifice top speed to ensure i can conquer more hills....
...Also 4 strokes are pretty torquey and if you have the 4G you “could” destroy the 11T drive sprocket more easily.... I guess I’ll find out soon.... I don’t pretend to be a pro, but just want to help others learn lessons without doing it the hard way.... good luck man