The motor is a 2750 watt 1.60 gas equivalent... I found a couple of the white shaft housings at work... they had 16 mm shaft with bronze bearing. The black shaft housing has a 1/2 inch shaft also has bronze bearings.
I have not bored the metric adapter yet. It was mostly to see if I could cut a thread that would fit the 30mm x 1mm freewheel.
Trying to fit an an 1.375 freewheel adapter into the bottom bracket shell. Not sure what thread it is but it is a tight fit that I didn't want to force.
Made this adapter to fit a 52 tooth chain ring to the disc brake mount. This ring was less than 10 bucks and was intended for the old 1 piece style crank arm that is still used on some bikes. this is a junker rim that had a disc brake hub on it. I'm using it to line up drive train until I get my new wheel.... which should be in the next day or two.