Hey mx- so you're still a fan of this motor after thrashing it about for a while? I'm considering buying a 12090 in a few months for the Hyper Explorer frame I recently bought.
By noise, can you describe specifically what it sounds like? Is it present at all rpms, does it change/increase with speed, growl, whine, etc? That U15 motor I have makes a bit of a shriek when winding it up, which is actually cool IMO.
There are 2 bearings on the 12070 correct, and they're roughly how far apart? They've held up well?
Do you, or does anyone know if they've gone back to the thinner steel laminations by now?
Will I be able to tune it in the latest vesc-tool without much trouble as opposed to the difficult U15? The 12090 has fewer stator teeth and magnets... and is it available with hall sensors and is that advisable instead of sensorless?
I believe it's a 12mm shaft. Anyone know a source for #219 front sprockets that are compatible? I'll go with 219 chain on this build as target is 15+kw and over 60mph.