250 watt motor and 18max current controller?

[RunForTheHills]

Torque arms are recommended. Grin torque arms are the gold standard. This is the torque arm they sell for the Bafang G311 motor that you have: https://ebikes.ca/shop/electric-bicycle-parts/torque-arms/torqarm-311.html

 

[harryS]

Self learning usually works. If you have a voltmeter, measure the throttle voltage to make sure it's increasing smoothly from about .70 v to a max around 4.3 V when you rotate it. Maybe it's jumping from 0 to 4V.

 

[PCeBiker]

Lithium grease for example right?

There's better grease to use.
I bought Corn Head grease, and Mobile 28 before I found out that Mobile SHC100 was better.

I used the Mobile 28.

Anything is better than nothing though.
Use bacon fat if that's all you've got.

The smell of bacon frying will let you know when your motor is too hot.

Re-greasing the Ultra motor...is it time?

The Ultra motor is my UC Pro is getting louder and louder, so I think it may be time to re-grease the gears. This is the first time I've done this, so any tips would be appreciated. I've watched a handful of videos on this topic, using Corn Head grease, and it looks to be a straightforward...

forums.electricbikereview.com

 

[PCeBiker]

See vid.

You may have actually had your phase wires correct and the controller knew that the wheel was over revving so it kept shutting down the power?

That's just a guess, but try revving up your wheel slowly and see if it pulses.

The wheel spinning in the air behaves differently than a wheel under load.

The controller may be trying to protect the motor?


Actually my parts car behaves the exact same way.
I wanted to see what would happen if I put it in neutral and hammered the gas.

The engine red-lines at 6000 rpms, and when it hit 7200 rpm it started pulsing the exact same way as your motor.

I was trying to toss a rod through the hood but it didn't happen.

 

[PCeBiker]

,.. Do you think it will do the job. I ordered the one called 10x14x5: https://www.aliexpress.com/item/100...o.order_list.order_list_main.5.21ef1802dBjObF

I bought two of these that I didn't end up using.
They've got a better design than your link, but the Grin version is only a few dollars more, and worth the extra money.


I just found this on AliExpress:
C$16.58 | M12/M14/M16 Electric Bike Torque Arm Accessory for Front Rear E-bike 250W-8000W Motor Ebike Torque Washers Motor Safety Parts

https://a.aliexpress.com/_m0tdKNB