Left side freewheel sprocket question
I'll be "rolling my own" ebike over the next few weeks. Planning to use a 400watt counter-clockwise motor to drive a left side crank sprocket. Rather than messing with a hard to find freewheel crank sprocket, it seems like it would be better to put a freewheel sprocket on the motor instead. It would need to freewheel the opposite direction of a right side sprocket. And it would need left had threads so the torque doesn't unscrew it.
Anyone know if a standard freewheel sprocket can be screwed on from it's outside, as in backwards?
If not, are there left side freewheel sprockets out there?