ohh.... getting rid of a perfectly ok bike and getting what ? Its actually a copy of my design from years back, but we used crmo tubing versus gas pipes ...
solve the problem of the seating position with an Aber hallo stem extender instead .
electrifying ... well lets start with the front fork ... I assume a cheap huddled together front wheel kit is in the plans ... for the Dahon you need a 74 mm old motor ..
But you really want to at least upgrad the fork for the additional stress .... Tern has a great fork with 100 mm old and disc brake mounts.. 150 bucks ...
you will need disc brakes 50 to 80
cables 10
most likely a front wheel ( 36 spokes )
50 bucks for a rim, 20 for spokes, ??? labour
at that time you still have a one speed bike ..
Thor