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Ok I'll try contacting cortina. Probably best thing to do is to plug in a besst bafang diagnosis tool. But thanks for the advice. Moral of the story is to get a bosch ebike whenever possible :)

connected the 600c display again but unfortunately still got the same issue. Bike is not being used anymore anyways so we are not supermotivated to dig deeper into this. My guess is that the controller is at fault which might be coincidence as well; don't think removing the speed limit should...

Not sure what exactly happened, it is my brothers bike. Tomorrow I will install the other display and I will let you know if it solves the issue. My guess it is the controller but it is still worth a try.

Thanks for the quick reply. The Alibaba display was borrowed by a family member. We discovered that by plugging this display in the parameters of the motor are changed so there is no 25km/h speed limit anymore. After this tuning I did use the original display again for a while but I now got...

Dear forum members, I hope you can help me out with this issue :) Cortina bike with m420 bafang motor doesn't seem to turn on anymore without removing battery first. So when I turn the bike off I can only turn it on again by shortly unplugging the battery first (or by unplugging display cable...

Oké thanks for the reply, already had a suspicion the controller could be the culprit here. But for now I will leave it like this, too expensive/much of a hassle to fix this. 👍

Dear eBike forum members, I've got a Cortina bike with a bafang m420 mid drive motor "issue". When I turn on the motor when I'm already moving it apparently gets a bit confused and it then starts to behave really annoying with this intermittent on/off behaviour. I don't see any other error...