my opinions
the bit of experience i have that applies here depends on: what
kind of drive?
friction/
direct NO to coaster is what i'd guess, there'd be a lot going on for a hub with no "true" freewheeling...
if it's a
centrifugal clutch setup, which is what i have most of my experience with, i can assure you with proper handling a coaster will do just fine.
only a guess and only an opinion..."build smart" is what i say
coaster input:
the basic steel-rim/105G/
shimano cb-e110 has proven itself dependable and an affordable
minimum standard across the entire spectrum of motorized bicycling, i've had or seen (in real-life, and/or on MBc) every kind of MB drive successfully combined with one. they go for around $50 + shipping...you maybe can find the "hi-stop" version for a few dollars less, don't do it.
MORE coaster input: never EVER use a coaster brake without a good front brake :helmet: