Nice, thanks for the suggestion... so I might go that route then... also been eyeing the MAC motor too... and the Infinieon controller doesn't seem to bee too expensive either. The fact I don't know much about this kind of stuff doesn't make it any better... I don't even know what kind of chain this kit has... is it a #219? #50? any thoughts on that? The DD hub motor seems like a nice deal, 90% efficiency sounds great...
The worst I've managed to get my motor is just barely warm to the touch after 8 mile commute with hills. So not sure if this new Gen2 2015 motor is different than the older Gen2 motors? After taking this guy apart and inspecting I think you could oil cool this motor just fine; its nothing but an outrunner motor with a planetary gear...
Sooo
, turns out the motor can was not bent after all, just bad bearings; so I replaced the rear ball bearings and the motor is close to straight as an arrow now; and rotates quite smoother than even when new.
I am in joy and go for a test ride... all good... so,
when I thought my misfortune was about to end there, the shaft notch that holds the drive sprocket broke off while testing the bike.. At that moment (2 AM) I gave up and went to sleep. I managed to get 8 miles out of the straightened motor before the keyed shaft pin broke off and I did noticed around 15-20 watts less power consumption when unloaded. New it was about 87 watts unloaded (just sprocket, no chain) now it sits about 68 watts unloaded. I did notice the motor runs quieter as well... So it might be worth investing on ceramic bearings and a larger and thicker motor shaft for this guy.
Do you have an idea as to how to fix the groove where the motor sprocket holds onto when rotated? I am thinking of using the Dremel to make couple of grooves/channels and slide some chain pins to hold the sprocket in there. Surprising how bad the design on this motor is; everything just keeps breaking and needs replacement with higher grade parts. Motor shaft is definitively worthless on the 2015 Gen2s...
I am at a point in which I might have the local machine shop that fixed it and have them make me a harder, longer and splined 12mm shaft for the motor.
And the moral of this story is :drumroll: Don't be cheap like me... spend a few more bucks and get something better. So, with that said, my wife's future ebike will not be getting a GNG... no questions about that.
G.