I finally took my ebike for a test ride.

[PedalUma]

I did the 'Just get a burger' for 45-minutes with a MacFox today. I diagnosed it in seven seconds. It is a failed motor core. It stutters and grinds like hell before it dies.

Here is what happens when BB spacers are not used on a MTB, and the main-gear motor housing is cranked down against the wide chainstay. It worked for one ride. At the next attempt it broke on the driveway. For the price of a new right housing, chainring, and display, I have a new motor. It would be great for a cargo bike conversion.

 

[PCeBiker]

I had a hard time finding a UART BBS02B with 100mm BB spacing.

I couldn't find Any 500 Watt versions, and had to buy a 750 Watt motor to get the spacing I needed.

The BBS02B, especially a UART version, is almost extinct.

Here is what happens when BB spacers are not used on a MTB,

I got the spacing right, but I wanted to "cushion" the impact point between the motor housing and my downtube.

The motor was only making contact with about ¼" of the downtube, so I put a piece of urethane (cut from a piece of my skateboard truck "shock absorber" from 1978) between the housing and downtube, then "preloaded" it with a pry bar while I tightened up the BB nut/fastener.

Then I put hot glue on it to help keep it in place.
It is pinched in there pretty good, but it could loosen up I guess?

 

[PedalUma]

I used a rolled section of used tube for that. I cut an oval in the middle to fit the round of the down tube and levered it in hard while tightening the left side with tons of locktight.

An Apias bike is coming in for assembly. I wonder how they arrived at that name? Must have been inspired at the Baboon enclosure.