So comming back to this bike with a bit of precautionary info, a friend has this Nel lusso that was motorized and so far the rear wheel has failed twice. The bearings I think he said failed the first time, and now again. This bike uses a coaster brake but that is being removed entirely for starters because the hub has failed again and I don't trust it, and it's kinda pointless once you have front and rear v brakes.. Here's a shot of the bearing failure on the coaster brake arm side.
Don't mind the fact that the sprocket isn't centered, the chain broke shortly beforehand, being that the bearings were out of whack and the wheel was litteraly jiggling in the dropout so that will screw stuff up.
Second part I would say is a safety concern is the major one which I discovered while working on rebuilding the wheel with a new hub, apparently the flanges on these hubs aren't part of the hub, but are a ring that's pressed in place on the outside of each end of the tube that makes the guff of the hub.
While I was removing spokes, which isn't a hard thing to do, requiring little muscle, the flange litteraly just lopped off!!
I sure that is the side that held the large drive sprocket, so I guess with all the extra force on the spokes (good thing they used 12 gauge spokes for stock I might add) must have pulled outward on the flange enough to make/stretch it slightly larger so it could simply come off.
Now I kind of have a problem with the fact that flange, which holds the wheel f***ing together, can be simply disconnected from the hub just by introducing a rag joint to the wheel...
As a standard, for now on when it comes to me personally building a bike, I would replace the rear wheel on this bike immediately before going further into motorizing it, and I'll also check other bike's hubs as well, if it looks like they are using a pressed on flange then it gets chucked if it's aluminum, and welded if it's steel, even then it's still probably best to chuck it regardless. That's a design that doesn't even require a motor to cause destruction, simply time can do that by putting tension on the flange.