Yuba Spicy Curry motor cutoff

[rodneyg]

Hi Everyone! New proud owner of a Spicy Curry. We will probably do a custom build on our non-ebikes next year, but figured we should get a cargo bike first.

Anyways, does anyone know how to adjust or correct the motor cutoff speed? I ask this because I think my son accidentally kicked something (speedometer errored on the screen but I fixed it by making sure the magnets or sensor faced the correct way) and I can't find the speed cutoff or what ever sensor.

It used to work and I would be able to pedal over 20mpg with the motor carrying until it can't. But lately it has cutoff at 14mph reliably for this week. I am still within a window to get a free tuneup where I purchased the Yuba, but I want to learn as much as I can myself. I know it cuts off because it becomes very jerky when going on a slight incline and I can hear the motor whine. It is becoming very annoying.

Any help is appreciated. I looked everywhere for manuals, but cannot spot one. I'm hoping it is just something very simple that I missed.

 

[dogman dan]

First thing to look at is the battery, on any kind of troubleshoot. It may be that your battery is sagging and causing the cut off.

If the display goes dark during the cutoff, its the battery cutting it off, not the display. Find instructions for programming display features, likely on line somewhere.

Jerky operation is usually a poor connection to a motor cable. Check all cables and plugs for loose contacts, or cuts is the second thing to look at on any troubleshoot. once battery is ruled out, wire problems are 90% of all problems.

 

[rodneyg]

What does a sagging battery mean? Is it literally sagging? Or is it a non-technical term used in replacement to a technical term.

I'll go ahead and make sure all connections are tight.

 

[titusmc]

What does a sagging battery mean? Is it literally sagging? Or is it a non-technical term used in replacement to a technical term.

I'll go ahead and make sure all connections are tight.

A "sagging" battery just refers to the voltage dropping under load. All batteries will do this, but some exhibit greater voltage drop because they have higher internal resistance (laptop cells, for example). If the resting voltage of the pack is above the LVC, it can still cut out if applying the load causes the voltage to drop below LVC.