Hi everyone!
I have a mid-motor bike from local brand with Bafang M400 36V 250W system installed. All components are stock ones.
Yesterday I finally got a few spare hours for bike maintaining. I replaced chain and both sprockets, front and back. Both new sprockets with same teeth numbers as old ones, but I didn't find replacement for stock full-steel front sprocket so I replaced it with aluminum spider + steel chainring.
After assembly I got a strange problem. When I'm pedaling the assistance work as it should, bike is speeding up. But when I'm stop pedaling than the motor doesn't turns off. If I remove legs from pedals they continues rotating and bike maintaining speed. I can turn the motor off by stopping pedals from rotating (like half-breaking) or by turning assistance off. There is no errors on display, speed displays correctly.
I checked all wires and connectors from controller, no result. I also noticed that if I overturn a bike, rotate pedals by hand and then rotaate pedals backwards for braking, there is a little resistance and whirling from motor (even with power off), and I don't remember that it was like this.
Does somebody had the same issue? Any ideas are welcome, because mine already ended. I just can't understand the nature of this. If there been a dead torque sensor, then the assistance wouldn't work at all. Could it be in some half-dead state? Or might be I overtightened something?
I have a mid-motor bike from local brand with Bafang M400 36V 250W system installed. All components are stock ones.
Yesterday I finally got a few spare hours for bike maintaining. I replaced chain and both sprockets, front and back. Both new sprockets with same teeth numbers as old ones, but I didn't find replacement for stock full-steel front sprocket so I replaced it with aluminum spider + steel chainring.
After assembly I got a strange problem. When I'm pedaling the assistance work as it should, bike is speeding up. But when I'm stop pedaling than the motor doesn't turns off. If I remove legs from pedals they continues rotating and bike maintaining speed. I can turn the motor off by stopping pedals from rotating (like half-breaking) or by turning assistance off. There is no errors on display, speed displays correctly.
I checked all wires and connectors from controller, no result. I also noticed that if I overturn a bike, rotate pedals by hand and then rotaate pedals backwards for braking, there is a little resistance and whirling from motor (even with power off), and I don't remember that it was like this.
Does somebody had the same issue? Any ideas are welcome, because mine already ended. I just can't understand the nature of this. If there been a dead torque sensor, then the assistance wouldn't work at all. Could it be in some half-dead state? Or might be I overtightened something?
