Hi. I know I'm jumping in here but I and some others had a problem with the dnp freewheels fitted to some of the rear hub motors ebikes. For some reason (perhaps from heat from the hub), the grease solidifies around the freewheel pawls, resulting in loss of drive from the pedals. The cure in my (and others) case was to turn the bike on its side and pour plenty of light 3 in 1 oil into the freewheel,on the inside of the smaller 13t cog, behind the locking ring to get in via the freewheel bearing, working the pedals back and forward when doing this in order to soften the grease and get the pawls moving again.